Temperature sensors and seals for the Fuel Cell Industry

At the forefront of innovation

Customized solutions

For over 70 years, Conax Technologies has been a leader in the design and manufacture of high-quality compression seal fittings, temperature sensors and cable and harness assemblies for a wide range of industries, including fuel cells.

Fuel cell technology plays a vital role in helping to build a cleaner and more sustainable world for future generations. Conax Technologies is dedicated to supporting the rapidly advancing fuel cell industry with effective and reliable means of temperature measurement and pressure/vacuum sealing.

Conax high-performance solutions are used both within the fuel cell stack and in the balance of the plant, including energy storage systems, to improve efficiency and profitability. And fuel cell developers rely on Conax solutions to help get their products to market faster.

As a key component supplier to the power industry, we understand your need for accurate temperature measurement in energy production. We offer standard and customized thermocouples, RTDs and thermistors designed to meet your precise needs and withstand challenging environments, such as corrosive gases and acidic electrolyte.

Conax also manufactures a complete line of pressure/vacuum sealing devices that feature the “soft sealant” technology pioneered by Conax. We remain the leading manufacturer of this type of sealing device for wires, electrodes and probes, providing solutions that maintain the containment barrier and provide environmental protection for workers, equipment and the environment.

Our engineers welcome the opportunity to discuss and develop solutions to your most challenging applications.


Temperature measurement devices for critical applications

Accurate temperature measurement is critical to effective fuel cell operation, whether for testing and validation in development stages or in active production. Conax RTD and thermocouple sensor assemblies ensure accurate measurement in temperatures needed for maximum operating efficiency.

We provide a wide range of sensors from small diameter probes that fit tight spaces between plates to assemblies with exotic materials that resist environmental challenges. Our temperature sensor assemblies are accurate in temperatures ranging from subzero to 4200° F (2315° C) and can be used to monitor:

  • Air discharge passage
  • Fuel cell stack
  • Air manifold heater
  • Oxidizer exhaust
  • Anode exhaust
  • Cathode air inlet
  • Cathode discharge
  • Reformer water inlet
  • ATO air inlet
  • Outdoor air
  • Power terminals

Fittings and feedthroughs for vacuum and pressure sealing

Conax feedthroughs are used whenever probes, electrodes, wires or sensors pass through a pressure or environmental boundary. They serve as mounting devices and/or environmental seals. The compression of the soft sealant creates a seal on the element, restraining it from moving under pressure or vacuum and barring movement of gas or liquids along the element. In most cases, the sealants are replaceable and the seal fitting can be loosened and retorqued to allow adjustment in immersion length. Compression seal fitting assemblies can be customized with special mountings, threads and materials of construction to meet your unique needs.

Conax’s broad range of feedthroughs and sealing devices with soft sealant technology are used throughout the fuel cell as terminals, power lead feedthroughs and bulkhead seals on:

  • Cathode electrodes
  • Anode electrodes
  • Cathode Conductors
  • Anode conductors
  • Instrument wires
  • Humidity sensor lead seals
  • Thermocouple or RTD lead seals
  • Thermocouple or RTD sheath seals

ISO/IEC 17025:2017 accredited and AMS 2750 compliant calibration lab

With a calibration laboratory that is ISO/IEC 17025:2017 accredited and ILAC MRA certified, Conax is fully capable of producing calibration data that’s compliant with the latest AMS 2750F standards. ISO/IEC 17025:2017 sets the national standard of excellence for the competence of testing and calibration laboratories and recognizes Conax as fully competent to produce valid and reliable results.

Conax Technologies’ commitment to quality

Quality fuel cells rely on quality component parts. Conax Technologies is committed to providing the fuel cell industry with the highest quality products, fast turnaround and on-time delivery. Here are a few reasons why industry leaders rely on Conax products:

• AS9100D with ISO 9001:2015

• Metrology laboratory to NIST standards

• Pressure test capabilities to 100,000 psi

• Leak test by helium mass spectrometer

• Vibration test – Unholtz Dickie

Bring us your unique challenges.

We know that innovative ideas come from collaboration. By taking the time to understand your unique challenges, we develop the ideal solutions that help you—and your customers—succeed.

Our commitment to providing quality, innovative products on time and at a competitive cost continue to make us an indispensable partner for every customer we serve.

Customer loyalty

Customer satisfaction and loyalty fuels everything we do. Conax is proud to maintain a Net Promoter Score that is consistently in the 99th percentile.

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