Differential pressure sensor works with hydrogen
Engineers and system integrators can now safely measure the differential pressure of hydrogen and other gases while reducing the number of components necessary.
American Sensor Technologies, a New Jersey-based manufacturer of state-of-the-art, MEMS-based pressure sensing products, has added the Model 5000 wet/wet differential pressure sensor to its line of hydrogen-compatible pressure sensors.
Engineers and system integrators can now safely measure the differential pressure of hydrogen and other gases while reducing the number of components necessary.
Featuring AST's Krystal Bond technology, the Model 5000 does not contain internal O-rings or fluid-filled cavities, eliminating the chance of hydrogen permeation or system contamination from silicone oil.
The diaphragm is constructed of 316L stainless steel wetted materials that resists hydrogen embrittlement to ensure the highest reliability in today's hydrogen applications.
This design also provides excellent overrange and burst protection (5x rated line pressure or 138bar, whichever is less) ratings for system safety in the most extreme conditions.
"When pressure sensors with oil-filled and other thin diaphragms (less than 250um) encounter long-term exposure to hydrogen, it causes hydrogen embrittlement which reduces the mechanical properties of metal, leading to transducer failure", notes Karmjit Sidhu, Vice President, Business Development, American Sensor Technologies.
"Constructed of 316L stainless steel, the Model 5000 is highly resistant to hydrogen embrittlement which promotes the reliability needed for hydrogen systems".
Model 5000 wet/wet differential pressure sensors are CE EN61326 certified.
Units possess a high level (100V/m) of EMI/RFI protection and shock/vibration resistance to satisfy demanding performance requirements.
A stainless steel housing welded over the electronics maintains an IP-66 rating.
Female 1/8in-27 NPT threads simplify system integration.
Hydrogen-compatible packaging makes the Model 5000 pressure sensors ideal for hydrogen pipeline instrumentation, filling stations, compressors, PEM cells, and other hydrogen fuel cell applications.
Bidirectional and unidirectional pressure ranges are offered for applications with line pressures up to 69bar.
In the event that either pressure port is at full line pressure and the other at zero, no damage will be done to the pressure transducer.
Voltage and current outputs are available over a wide operating temperature range of -40 to +85C.
Accuracy specifications are better than 0.3% BFSL, including nonlinearity, hysteresis and nonrepeatability.
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