Thursday, August 17, 2017

9 Pin Vacuum Feedthrough: UHV Compatible Technology Serving the Semiconductor Industry

Some of the most stringent tolerances and vacuum requirements exist in the ever-expanding semiconductor industry. Tight restrictions in vacuum ports, high temperature applications and exposure to high stress environments further add to the challenge of designing an electrical feedthrough that can be manufactured quickly and installed with ease. An American multinational manufacturer of chips and microprocessors approached BCE with these exact requirements in order to replace their existing vacuum feedthroughs incapable of providing an adequate performance in ultra-high vacuum environments. Furthermore, their existing supplier had long lead times and the procured feedthroughs needed to be replaced often as their contacts would fail due to oxidation formation on the conductive layer.

SCOPE
  • The feedthrough needed to satisfy the following requirements: 
  • Ultra-High Vacuum (UHV) compatibility up to 1 X 10-10 atm.cc/sec 
  • Remain operable at temperatures exceeding 250°C 
  • Pins preventing oxidation of conductive layer for longevity 
  • 9 pin feedthrough configuration 
  • Voltage requirement: 750 AC RMS 
  • Current requirement: 7 AMPS 
  • Quick-turnaround on feedthrough manufacturing 
  • Robust seal withstanding high stress environments 
  • Ease in installation, simple design 
  • Low cost for application 
OUTCOME

All customer requirements were exceeded by BCE’s 9 pin vacuum feedthrough. Not only did it meet all electrical and configuration specifications, it provided a vacuum compatibility twice as much as that required by the customer allowing them to expand their capabilities to higher vacuum thresholds. It also remained operable at higher temperatures, nearing maximums of 300°C. Furthermore, the gold plated pins proved to be ideal in the prevention of oxidative layers inhibiting current flow. Moreover, BCE’s proprietary ceramic seal achieved the desired robustness and allowed the feedthrough to remain operable under high stress conditions. Finally, the client was equally impressed by BCE’s quick-turnaround time and competitive pricing.

Sunday, August 13, 2017

Video: Flanged, Replaceable, Multi-Thermocouple Electrical Feedthrough



With most vacuum feedthroughs, troubleshooting can be difficult as well when multiple fixed elements are involved. If one element fails, generally the entire vacuum feedthrough is rendered useless. With BCE’s Multi-TC, Flanged Feedthrough, arduous troubleshooting procedures are a thing of the past. In fact, this feedthrough’s thermocouples are replaceable as they can be extracted from the compression fittings with great ease. This means that if thermocouples fail, they can be removed, tested and replaced within minutes. Thus, this no-hassle design allows for faster, more accurate and more cost-effective thermal data collection. Trust BCE’s Multi-TC, Flanged Feedthrough for your most complicated thermal detection needs. Contact BCE for more information.

Replaceable, Flanged, Multi-Thermocouple Vacuum Feedthroughs

Multi-Thermocouple Vacuum Feedthrough
(Click for larger view)
One of the biggest challenges facing the vacuum industry is to collect multiple readings from complex assemblies while being limited by the number of existing feedthrough ports in a vacuum chamber. With BCE’s Multi-TC, Flanged Feedthrough, companies no longer need to invest in adding more ports for a greater collection of temperatures from a vacuum environment as multiple thermocouples are embedded in just one feedthrough. The number, type and lengths of the thermocouples can be altered to match specific application requirements meeting each customers’ unique needs. As the thermocouples can be adapted to meet unique design constraints, so can this feedthrough’s flange. All sizes used are standard and are easily mountable with readily available hardware. No complicated assemblies are required for the most complicated of vacuum setups.

With most vacuum feedthroughs, troubleshooting can be difficult as well when multiple fixed elements are involved. If one element fails, generally the entire vacuum feedthrough is rendered useless. With BCE’s Multi-TC, Flanged Feedthrough, arduous troubleshooting procedures are a thing of the past. In fact, this feedthrough’s thermocouples are replaceable as they can be extracted from the compression fittings with great ease. This means that if thermocouples fail, they can be removed, tested and replaced within minutes. Thus, this no-hassle design allows for faster, more accurate and more cost-effective thermal data collection. Trust BCE’s Multi-TC, Flanged Feedthrough for your most complicated thermal detection needs.

Specifications
  • Replaceable thermocouple(s) design 
  • Vacuum Integrity: 10-8 atm.cc/sec 
  • Multiple types and lengths available for thermocouple(s) 
  • Multiple types and sizes available for flange(s) 
  • Multiple types and sizes available for lead wires (KAPTON available for minimal contaminant release) 
  • Compatible O-rings available for flange(s) 
  • Can be adapted to virtually any temperature range
For more information, visit http://www.belilove.com/feedthrough.

Monday, July 31, 2017

BCE’s Optic Cable Feedthru: The Source For Accurate Spectrometer Data Collection

Optic Cable Feedthru
BCE Optic Cable Feedthru
Collecting data from a spectrometer has always presented unique challenges. Now, couple that with data collection in an ultra-high vacuum environment and intermittent pressures. This is precisely what a leading national laboratory focusing on American defense asked BCE to supply. This client was concerned with data collection across an ultra-high vacuum chamber using a unique feedthrough that would be easy to install, prevent damage to expensive equipment, and maintain employee safety.

SCOPE


The feedthrough needed to meet the following specifications:
  • Ultra-high vacuum compatible to 1X10–9 cc/sec of He @ 1 ATM 
  • Ease of installation into vacuum chamber wall 
  • Offer a high coupling efficiency into spectrometer 
  • Compatible connection with computing devices 
  • Remain operable under 100 psi of static pressure 
  • Be able to sustain pressures ranging from 500 to 1000 psi 
  • Adapt quickly, within milliseconds, to varying pressures 
  • Fit easily into restricted spaces 
  • Prevent release of contaminants via outgassing 
OUTCOME
BCE proposed its Optic Cable feedthrough as the ultimate solution to this design conundrum. The flexible stainless steel conduit of the fiber optic cable along with its connectors coupled easily with the spectrometer and company devices. The CF flange of the feedthrough mounted effortlessly into the vacuum chamber wall and BCE’s proprietary epoxy seal meeting NASA ASTM E595 allowed for less than 0.1% of volatiles to emanate into the environment and with less than 1% of mass loss. Further testing of BCE’s optic cable feedthrough at the client facility revealed that it remained operable at varied, high pressures while ensuring an ultra-high vacuum seal.

Monday, July 24, 2017

BCE’s Mini-Clean Flow (MCF) Heater at the Core of 4D Entertainment

BCE Mini Clean Flow (MCF) Heater
BCE Mini Clean Flow (MCF) Heater
Picture this: a heater that can sustain elevated motion, high temperatures and pressures, and be compact enough to fit into a restricted assembly. BCE was approached by a worldwide provider of 4D cinematic experiences to help design a custom heating apparatus. This novel thermal assembly would be capable of creating a desired heat effect enhancing the viewing of attraction films around the globe.

SCOPE
The heater of the apparatus needed to be able to:
  • Generate internal temperatures exceeding 500°C 
  • Ramp to elevated temperatures within minutes 
  • Operate at low voltage: 24V 
  • Sustain pressures up to 80 psi 
  • Assemble easily to a control valve 
  • Remain operable at a motion of 10 g 
  • Allow for acute temperature control 
  • Have a low mass design for efficient heat transfer 
  • Be compact; allowing the assembly to remain within a 10” envelope 
OUTCOME

BCE’s MCF heater provided the optimal solution to this design challenge. During pre-heat with no air flow, the internal temperature of the MCF reached 320°C. After an 80 psi air burst and temperature drop, the low mass of the heater was able to achieve an internal temperature of 505°C in just under 90 s during the heat effect. This greatly surpassed customer expectations. Not only was its compactness an asset in maintaining the dimensional restrictions, its unique design with NPT fitting assembled easily to other components. Moreover, the built-in thermocouple type K offered precise temperature monitoring for this sensitive application. Finally, its robust design allowed for continuous operation under the most strenuous pressures and motion.

Tuesday, July 18, 2017

Welcome to BCE

BCE (Belilove Company-Engineers) has over 60 years experience as a California based manufacturer, value added component integrator, and distributor serving the analytical instrumentation, semiconductor, photovoltaic, medical equipment, plastics processing, foodservice equipment, packaging, and aerospace industries. 

BCE offers custom electrical heaters, sensors, controls and custom vacuum feedthroughs for sale. Supported by their wealth of knowledge and experience, BCE will assist you with your electric heating, vacuum feedthrough, and ceramic substrate needs.

http://www.belilove.com | (510) 274-1990

Sunday, July 9, 2017

Vacuum Technology and Vacuum Design Handbook for Accelerator Technicians

A handbook titled "Vacuum Technology and Vacuum Design Handbook for Accelerator Technicians" published in 2011 and downloaded from the Lawrence Berkeley National Laboratory website, is a compilation of information gathered from over 50 years of direct hands-on experience to applicable information widely available from the vacuum technology industry.
It seeks to address common and specific vacuum technology problems while clarifying the design standards and philosophies adopted for use in the ANSTO accelerator facilities.

Friday, June 30, 2017

Happy Fourth of July from BCE

"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, — That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness."

THOMAS JEFFERSON, Declaration of Independence

Wednesday, June 28, 2017

Thermal Solutions Designed for Aerospace

Advanced electric heating elements and thermal systems designed and manufactured for application-specific requirements in the harsh operating environment of outer space.

Experience, precision, and reliability. BCE.

http://heater.belilove.com | (510) 274-1990

Friday, June 23, 2017

Flow and Pressure Instrument Product Guide for Biopharmaceutical and Life Science Applications

Producing biopharmaceuticals is one of the world’s most demanding manufacturing processes. Brooks Instrument’s mass flow and pressure control technology helps maximize cell culture yields and control bioprocess costs.

Brooks flow and pressure controllers set global standards for reliability, repeatability and long-term stability.

Efficient and long-lasting process control

Bioreactors need accurate, stable gas control to maintain critical process parameters, combined with maximum uptime to reach target yields. Brooks Instrument mass  ow controllers (MFCs) are engineered to deliver both, with superior long-term drift stability and the best mean-time- between-failures (MTBF) in the industry.


Ensuring accurate results

Accurate control is essential to bioreactor reliability and ef cient operation. Brooks Instrument MFCs deliver the absolute best actual process gas measurement and control accuracy. This starts with a superior design that delivers industry-leading device linearity, repeatability and reproducibility. Then we calibrate our devices on systems traceable to international standards, as well as calibrating on multiple gases (including CO2) to ensure you get the best possible accuracy.

To see the entire Brooks Instrument Biopharmaceutical and Life Science Product Guide click on this link of read below.

Wednesday, June 21, 2017

9 Pin Vacuum Feedthrough

Nine pin circular feedthroughs (often called instrumentation feedthroughs) are commonly used for the transmission of low power electrical signals. They are designed for applications where typical Subminiature Type-D connections will not fit, or where there is little space. The circular geometry allows the installation of this feedthrough into very small vacuum flanges. They are often used in instrumentation applications such as semiconductor processing, electron microscopy, and a variety of analyzers.

Nine Berrylium-Copper alloy contacts, Gold plated per ASTM B488-01, are sealed and electrically insulated in a 304 stainless steel shell using the latest in ceramic bonding technology. Multiple contact configurations are available.

Specifications:
  • Leak Rate: 2X10 - 10  CC/Sec HE At One Atmosphere
  • Laser Welded Assembly
  • Hermetic Ceramic Seal for Contacts
  • Temperature Rating: -65°C To 300°C
  • Voltage: 750 AC RMS
  • Current: 7 Amps
  • Compact, Fits Easily into Complex Assemblies
  • Adapts to Different Signals
  • Mating UHV Connectors and Cables Available
For more information, visit http://www.belilove.com/feedthrough.

Monday, June 12, 2017

Rapid Infrared Heating Reduces Energy Use, Improves Material Properties in Aluminum Forging

Batch-type infrared (IR) furnace
Batch-type infrared (IR) furnace.

The preheating of metal billets prior to hot forging as an opportunity for significant energy savings in the U.S. forging industry. Aluminum billet preheating is traditionally slow, costly, and energy intensive. Rapid infrared heating offers a faster, cheaper, and less-energy-intensive alternative to the gas-fired convection ovens that traditionally preheat forgings to above 800°F.

In a Department of Energy sponsored project, a scaled up a laboratory based, batch-type infrared (IR) furnace (see image) to create an optimized, hybrid, continuous IR furnace for industrial forging.
Demonstration of this IR furnace reduced preheating times for aluminum forgings from 1-6 hours to 14-18 minutes. The infrared pretreatment was 75% more energy efficient than conventional ovens, and the system proved robust under industrial conditions. The IR furnace demonstrated a downtime of less than 5% over three years of use in preheating billets. 

For any questions or applications about industrial electric heating visit http://heaters.belilove.com or call (510) 274-1990.

Thursday, May 25, 2017

Custom Electric Heating Elements

BCE designs and manufactures custom engineered heating solutions for analytical instrumentation, semiconductor, photovoltaic (solar), medical equipment, plastics processing, foodservice equipment, packaging, aerospace and many other industries.

Visit http://heater.belilove.com or call (510) 274-1990.

Tuesday, May 23, 2017

Variable Area Flowmeters (aka Rotameters) - How They Work

variable area flowmeter
Variable area flowmeter
(courtesy of Brooks Instrument)
A rotameter is one particular type of variable area flowmeter that measures flow by varying the cross-
sectional area a fluid or gas travels through in a closed tube.

Advantages
  • Requires no external power. 
  • Is a simple device that can be easily manufactured out of inexpensive materials. 
  • Linear scale. 
  • The clear glass tube is resistant to thermal shock and chemical reaction. 
Disadvantages
  • Must be mounted vertically, with designated top and bottom, and with the fluid flowing from bottom to top. 
  • Graduations on a given rotameter are only accurate for a given substance at a given temperature. Separate rotameters must be used for fluids with different densities and viscosities, or multiple scales on the same rotameter must be used. 
  • Resolution is relatively poor and gets worse near the bottom of the scale. 
  • Oscillations of the float and parallax lend to reduced accuracy. 
  • Difficult to automate - primarily a manual / visual device.

Monday, May 15, 2017

Need a Custom Design Electric Heating Element? Call Your Local Heating Element Sales Rep

Your Local Heating Element Sales Rep is Your Friend
Your local heating element sales rep is your asset.
Many design engineers at original equipment manufacturers (OEMs) may overlook a huge asset when designing a new piece of equipment requiring an electric heater. The local heating element sales representative.

Custom heating element design is best completed and accomplished through the proper application of the right resources. The local heating element sales engineer is an access point to high level technical knowledge and assistance that can be easily tapped and brought to bear on your successful task or project completion.

Local heater and control distributors and representatives provide services that will help you save time and money, with a greater chance of achieving a better outcome for the entire project. 

Consider these points regarding what the heating element sale rep brings to your project:
Custom heating element design
Example of custom heating element
(ceramic airflow heater)
  • Product Knowledge: The heating element sales rep will be current on product offerings, proper application, and capabilities. They also have information regarding what products may be obsolete in the near future. This is an information source at a level not generally accessible to the public via the Internet. 
  • Application Experience: As a project engineer, you may be treading on fresh ground regarding some aspects of your current assignment. There can be real benefit in connecting to a source who has decades of designing electrical heating elements. 
  • Access: Through a heating element sales rep, you may be able to establish a connection to “behind the scenes” manufacturer contacts who will champion your project internally. The rep knows people, makes it his/her business to know the people that can provide answers, and can act as your projects ambassador with the manufacturer.
Certainly, any solutions proposed are likely to be based upon the products sold by the representative. That is where considering and evaluating the benefits of any proposed solutions become part of achieving the best project outcome.

Develop a professional, mutually beneficial relationship with a heating element sales rep. Their success is tied to your success and they are eager to help you.


Saturday, May 13, 2017

Swaged vs. Standard Cartridge Heater Design and Heater Life

Cartridge heaters provide localized heat to restricted work areas requiring close thermal control. Dies, platens and a variety of other types of processing equipment are efficiently heated. Closely controlled work temperatures up to 1400° F (760° C) are obtained by a combination of heater location and proper wattage output.

Heater Life

Cartridge heater life is determined by how efficiently the heat generated in the resistance wire can be conducted away from the wire and into the part being heated.  The efficiency of heat transfer is generally controlled by three factors:
  1. Resistance wire watt density
  2. Density of insulating material around the wire
  3. Fit of the heater into the heated part
There are two basic designs of cartridge heaters - swaged and standard. Although both type heaters look identical, the internal construction is very different.

Standard Cartridge Heater Design

Standard Cartridge Heater Design
Standard Cartridge Heater Design
Nichrome wire heating coils are inserted in holes formed in ceramic tubes. Pure magnesium oxide filler is vibrated into the holes housing the heating coils to allow maximum heat transfer to the stainless steel sheath. The heater then has a Heliarc welded end cap inserted on the bottom of the heater and insulated leads are installed. The MGO powder is not compacted and heat transfer is a function of the grain-to-grain thermal conductivity to the heater sheath, and then into the heated part. Because of this, the heater wire watt densities must be kept in the low to medium range.

Swaged Cartridge Heater Design
Swaged Cartridge Heater Design

Swaged Cartridge Heater Design

Swaged cartridge heaters wind Nichrome wire around a precision ceramic core and the carefully position the resistance wire and ceramic core uniformly inside the the heater sheath. Pure magnesium oxide (MgO) powder is then vibrated in and the heater is swaged to a specific diameter. Swaging is a process that mechanically forces the heater through a confining die to reduce its diameter and thus compact the powdered MgO to rock-like consistency for greater thermal conductivity. This compressed MGO transfers the heat from the resistance wire much more efficiently. The improved heat transfer allows for higher wire watt densities allowing swaged cartridge heaters to operate at higher temperatures.

Cartridge Heater Fit

The most common cause of cartridge heater failure is an improper fit in the hole into which it is inserted. If the heater is surrounded by air, an excellent thermal insulator, it cannot dissipate it's heat into the part with optimum efficiency. The result is much higher temperatures on the Nichrome wire and failure.  The goal to longer life with cartridge heaters is to accommodate the tightest fit practical for a given application.

In summary, if you want the longest life cartridge heater, choose a swaged heater and make sure you provide a machined, close tolerance fit between the outside diameter of the heater and the inside diameter of the hole.

Monday, May 8, 2017

Epoxy Feedthroughs A Better Option Than Glass-to-Metal for Under 200 Deg. C.

Epoxy Feedthrough
Multi-conductor Flanged Epoxy Feedthrough (BCE)
Vacuum and ultra-clean manufacturing applications have continuously challenged designers with the need for versatile and cost effective ways to get power, control signals, fiber optic, and pneumatic lines in and out of a vacuum.

Failures due to contamination, dust, or leaks can be devastatingly costly, in both money and time.

Historically, glass-to-metal (GTM) hermetic seals have been used, but their limited size, shape, pin options, and shielding limitations have frustrated designers. A more accommodating and cost effective feedthrough solution was badly needed.

Enter epoxy potted feedthroughs. While GTM has a distinct advantage in very high temperature applications, in low-to-medium temperature applications newer epoxy resins are quickly gaining ground. Ideally suited for use where continuous temperatures stay under 200 deg. C , the versatility and cost of epoxy feedthroughs make them a clearly better choice. Additionally, in many cases epoxy feedthroughs can be prototyped and small quantities can be provided much more quickly.

Ultimately, epoxy vacuum feedthrough’s greatest advantage is their design versatility and option flexibility. Flanges, threaded connections, circuit board mounts, 120 volt receptacles, thermocouples, pneumatic tubes, Sub D connectors, and fiber optic cables are all examples of options that are easily accommodated. No longer does a designer have to conform their design to a standard glass-to-metal specification. Epoxy vacuum feedthroughs give designers the freedom to have a feedthrough that exactly meets their needs.

Saturday, May 6, 2017

Why Cartridge Heaters Fail

By understanding the most common reasons cartridge heaters fail, users can take preventative steps in their applications to achieve optimum heater life and lower equipment ownership costs.

Improper Fit
The most common cause of cartridge heater failure is an improper fit in the hole into which it is inserted. If the heater cannot dissipate the heat being generated and produced by contact with the sheath, the temperature inside the heater will continue to rise until the heater fails.

Moisture and/or Impurities
The MGO used in cartridge heaters is hydroscopic. Every time power to electric heaters is eliminated, an internal vacuum occurs which draws in air from the surrounding area. If moisture or impurities (oil, gas, etc.) are present, they can be drawn in to the heater, and cause a short circuit resulting in a heater failure.

Watt Density is Too High
If the watts/square inch is excessive, the heater will not be able to dissipate the heat and the heater will fail.

Incorrect Voltage Applied
The wattage of any electric heater varies as the square of the voltage. If a 120 Volt heater is powered on 240 Volts, the wattage will be 4 times greater than that for the same 120 Volt heater. Under normal conditions, this may result in heater failure.

Frequent Temperature Cycling
Rapid cycling of heaters from very low to very high temperatures shortens their life considerably.


About BCE
BCE is a recognized leader in manufacturing and applying resistance heating elements in many industries, including medical, analytical, packaging, process, food equipment, and aerospace. BCE's extensive standard and custom product lines include:
  • Cartridge heaters
  • Immersion heaters - ideally suited for heating various liquids
  • Air process heaters - for providing hot air and gas up to 1,400 degrees
  • Stainless steel strip and thin strip heaters in various sizes
  • Self-contained one-piece assembly coil and rope heaters
  • Tubular and finned tubular heaters - specially built to resist impact, vibration corrosion and temperature extremes
  • Band heaters for a multitude of applications
  • Ceramic and crankcase heaters
For more information, visit http://heater.belilove.com or call (510) 274-1990.

Thursday, April 27, 2017

Lower Power Plant Operating Costs with Guided Wave Radar Technology

Guided Wave Radar Level Control in Power Plant
Guided wave radar level controls can lower
operating costs in power plant applications.
For most power plant operators, fuel expenditures account for seventy to eighty percent of production costs and millions of dollars per year. In fact improving heat rate one percent could generate five hundred thousand dollars an annual savings for five hundred megawatt power point.

To contain fuel costs, power plants must maximize the efficiency of their feed water heaters. That's why many companies today are focusing on improving heat rate as a way to use their feed water heaters more effectively, and significantly reduce their fuel costs.

Heat rate is a measure of how efficiently a power plant uses heat energy. You can measure heat rate by the number of BTU’s your plant requires to generate a kilowatt hour of energy. As you're heat rate goes up so do you're fuel costs.

wave radar
Guided wave radar
principle of operation.
The condenser is the beginning of the feed water heaters process, where condensed steam from the feed water heater drains, and HP, IP and LP turbines is routed through successive feed water heaters. At the same time, extractions steam from your turbines reaches the appropriate feed water heaters and the transfer of energy takes place.

Maintaining accurate and reliable level control throughout this cycle is critical to achieving the final feed water heater temperature that your process requires.

Let's take a closer look at how this works. Feed water heaters use the heat of condensation to preheat water to the correct temperature for the boiler. During this process, shell and tube heat exchangers allow feed water to pass through the tube side and extract steam from the turbine to the shell side.

The primary benefit of this process is that the feed water heater decreases the fuel costs by using recovered energy, rather than costly hot gas, to heat the water.

Achieving optimum water level in a feed water heater is a critical component of maximizing energy transfer and minimizing controllable losses.

There are normally six to seven stages of feed water heating. Making an investment in level control can help you achieve optimum heat transfer and improved terminal temperature difference to provide a significant return on investment.

Magnetrol Eclipse 706
Magnetrol Eclipse 706
Guided Wave Radar
Level Transmitter.
With a guided wave radar level control, you can optimize the condensing zone of your feed water heater to deliver accurate level control, maximize energy transfer, and minimize undue wear and tear. This can help you generate the savings needed to recover your investment.

Older level technologies, such as differential pressure, magnetostrictive, or RF capacitance and torque tubes are vulnerable to process conditions and induced instrument errors, such as shifts in specific gravity and mechanical or electronic drift.

In contrast, guided wave radar provides a truly reliable level measurement solution for feed water heaters. Guided wave radar performance is virtually unaffected by process variations and gives you a superior degree of accurate and reliable continuous level measurement without the need for calibration or gravity corrections.

With superior signal performance and advanced diagnostics, guided wave radar delivers premier level control for feed water heaters, as well as a broad range of challenging applications, such as condenser hot wells, de-aerators, and cooling tower basins.

Combining a magnetic level indicator with guided wave radar merges the operating systems of a conventional flowed base magnetic level indicator with a leading edge solution. This allows you to effectively measure low dielectric media, high temperature, and high pressure process conditions and media, with shifting specific gravity and dielectric values accurately and repeatedly. The result is a diverse and redundant level measurement solution in a single chamber design.

For more information contact:

Belilove Company-Engineers
21060 Corsair Blvd
Hayward, CA 94545
Phone: (510) 274-1990
Fax: (510) 274-1999
E-mail: sales@belilove.com

Monday, April 17, 2017

Need a Standard Electrical Outlet with Your Vacuum Feedthrough?

Sometimes you just need a fast and easy 120 volt socket available on the other side of the wall. These feedthroughs provide a standard 120V, 15 amp socket for a quick, reusable connection. Custom configurations are easily accommodated.


Specifications
  • 120V, 15A Electrical Feedthrough
  • Helium Leak Test: 10-7 Torr
  • Maximum Operating Temperature: 100°C
  • Options include: Adapter, Receptacle, Leads
For more information, visit http://www.belilove.com/feedthrough.

Tuesday, March 14, 2017

BCE Epoxy Vacuum Feedthrough for Liquids and Gas

Here is a brief introduction to a vacuum feedthrough designed for delivery of liquids and/or gas in to a vacuum chamber. The feedthrough has a maximum operating temperature of 150°C-200°C and includes (2) 316 SS tube socket weld unions and 1/4" OD tubing.

A wide variety of optional fittings, tube diameters, and epoxy sealing shapes available.


For more information, visit http://www.belilove.com/feedthrough or call (510) 274-1990.

Saturday, March 11, 2017

Fiber Optic Cable Epoxy Vacuum Feedthrough

Here is a short video outlining the design of a fiber optic vacuum feedthrough assembly.

Epoxy compounds now rival glass and ceramic in performance. BCE is at the forefront of this development and leverages modern epoxy's unique properties to solve your feedthrough challenges.

BCE's sixty years of high-tech design experience in semiconductor equipment, medical equipment and R&D yields innovative vacuum feedthrough solutions.




Call Today (510) 274-1990 or visit http:// www.belilove.com/feedthrough


Friday, February 17, 2017

Vacuum Feedthroughs

Epoxy sealed vacuum feedthrough
Epoxy sealed vacuum feedthrough
There exists a popular idiom which states, "Life does not exist in a vacuum." While the linguistic implications of the popular saying are still up for debate in terms of life in general, in high-tech industries an environment can, indeed, exist in a vacuum. Both creating and subsequently evaluating conditions relating to sub-atmospheric pressure environments has been a longstanding challenge of the science and research. The benchmark for failure is rather absolute due to the fact the conditions of the vacuum can be compromised thanks to the smallest amount of a complicating substance, potentially resulting in substantial monetary or productivity losses. Due to these facts, the monitoring and evaluation of vacuum conditions is paramount to researchers and engineers; the way engineers execute such a balancing act between preserving the environment and tracking the process relies on technologies known as vacuum feedthroughs, which enable the transference of signals to equipment or instrumentation located outside the vacuum environment from inside the vacuum environment.

PCB mounted epoxy sealed vacuum feedthrough
PCB mounted epoxy sealed vacuum feedthrough.
Glass or ceramic vacuum feedthroughs, sometimes known as bulkhead connectors, are commonly used to route power and data into isolated environments. Typically cylindrical, the fitting assemblies allow for connections to be established between the vacuum chamber interior and exterior in a manner that prevents leakage into the chamber. Applications needing quick connections or disconnections on one or both sides of the chamber wall require bulkhead connectors. High quality helps assure complications relating to loss of signal or seal leakage are avoided. With that said, while the bulkheads are able to fulfill the aforementioned requirements of the high-wire act, there are other options available for addressing the same challenge which are potentially more advantageous under different conditions.

For some applications, epoxy sealed vacuum feedthroughs, a comparatively newer technology, provides numerous practical and technical advantages over their glass or ceramic counterparts. In the case of a feedthrough which is going to remain sealed (such as a vacuum chamber utilized for space simulation) the hermetically sealed epoxy wire feedthrough provides a great range of flexibility in design. Additionally, despite their nature as a customized product, as opposed to a regular bulkhead, the installation cost of an epoxy sealed feedthrough on a permanent installation can be advantageous. Some feedthroughs designed to pass wires from atmospheric environments to high vacuum environments are engineered to function in temperatures from -40F to 200F while paired with the industry standard wires and cables. These devices can be a marquee choice for vacuum-oriented process control thanks to their design variance and durability, even under the most challenging of industrial conditions.

Depending on the situation, either bulkheads or epoxy sealed feedthroughs can help engineers and designers combat a longstanding challenge in working with vacuum environments.

For more information visit http://www.belilove.com/feedthroughs or call (510) 274-1990.

Friday, February 3, 2017

Cerawatt Ceramic Electric Heating Element by BCE

CeraWatt ceramic heating elements
CeraWatt ceramic heating elements
CeraWatt ceramic heating elements are composed of high temperature materials such as tungsten and alumina ceramic substrates. The metal heating resistance element is thickfilm technology. CeraWatt heaters provide excellent corrosion resistance, high operating temperature, long life, energy efficiency, uniform surface temperatures, and outstanding thermal conductivity.

Features
  • Fittings are available as NPT, SAE, BSP & VCR. 
  • Maximum Operating Temperature: 800°C. 
  • Operating voltages: 60V, 150W 
  • 90V, 350W 
  • 120V, 625W. 
  • Compact, durable & highly efficient heat exchange.

Friday, January 13, 2017

Continuous Liquid Level Measurement Technologies Used in Industry

continuous level measurement
Level measurement in Industry
Although continuous level measurement technologies have the ability to quantify applications for bulk solids, slurries, and granular materials, liquid level technologies stand out as being exceptionally crucial to the foundation of process control. Called transmitters, these continuous liquid level measurement devices employ technologies ranging from hydrostatics to magnetostriction, providing uninterrupted signals that indicate the level of liquid in a vessel, tank, or other container.

Hydrostatic devices focus on the equilibrium of dynamic and static liquids. There are three main types of hydrostatic transmitters: 1) displacer, 2) bubbler, and 3) differential pressure.

displacer transmitters
Displacer transmitters
The displacer transmitters utilize a float placed within the liquid container. With its buoyancy characterized to the liquid and the application, the float, a connecting stem, and a range spring or similar counterbalance represents the liquid level in terms of the movement of the displacer (float). The displacement, or movement, of the assembly is converted into an electric signal for use by the monitoring and control system.

Bubbler transmitters are used for processing vessels that operate at atmospheric pressure. This method introduces a purge gas or an inert gas, e.g. air or dry nitrogen, into a tube extending into the liquid vessel. Precise measurement of the pressure exerted on the gas in the dip tube by the liquid in the tank is used to determine the height of the liquid.

Differential pressure (DP) transmitters rely directly on, in a basic explanation, the pressure difference between the bottom and top of the container. Precise pressure measurement is used to determine the height of the liquid in the tank. One of the most advantageous aspects of DP transmitters is that they can be used in pressurized containers, whereas displacer and bubbler transmitters cannot.

Other examples of level transmitter technologies which are not hydrostatic devices are magnetostrictive, capacitance, ultrasonic, laser, and radar.

magnetostrictive level transmitters
Magnetostrictive level transmitters
In magnetostrictive level transmitters the measuring device, a float, has a series of magnets that create a magnetic field around a wire enclosed in a tube. Electrical pulses sent down the wire by the transmitter head product a torsional wave related to the position of the float, which moves with changes in liquid surface level. The transit time of the torsion wave back to the sensing head is measured and the depth of the liquid, as indicated by the float position, can be determined.

Capacitance transmitters are best applied to liquids that have high dielectric constants. Essentially, changes in the capacitance of the sensor / tank / liquid assembly will vary proportionately with the liquid level. The change in capacitance is measured and converted to an appropriate electrical signal.
Ultrasonic level transmitters
Ultrasonic level transmitters

Ultrasonic level transmitters emit ultrasonic energy from the top of the vessel toward the liquid. The emissions are reflected by the liquid surface and them time required for the signal to return to the source is used to determine the distance to the liquid surface.

Laser level transmitters operate similarly to an ultrasonic level transmitter. However, instead of using ultrasound signals, they use pulses of light.

Radar level transmitters
Radar level transmitters
Radar level transmitters involve microwaves emitting downward from the top of the container to the liquidís surface and back again; the measurement is the entire time-frame. One variable radar level measurement echoes capacitance measurements: they both involve dielectric contact of liquid.

The precise measurement of transmit time for a wave or pulse of energy is employed in several of the technologies, the measurement of pressure in others. Each technology has a set of attributes making it an advantageous selection for a particular range of applications. Share your liquid level measurement challenges with an application expert, combining you process knowledge with their product application expertise to develop effective solutions.

For more information on any industrial level application, visit Belilove.com or call (510) 274-1990.