Hydrogen pressure sensor

The generation and storage of hydrogen poses challenges in the types of pressure sensors that can be used safely and accurately in hydrogen applications. The AST2000H2 pressure sensor, from American Sensor Technologies is a digitally compensated pressure sensor that is designed to have the accuracy and construction to meet the demands of the hydrogen pressure measurement market.

This sensor can be used in many hydrogen pressure measurement applications, such as in PEM fuel cells, onboard vehicle cylinder pressure measurement, hydrogen regulator pressure measurement, hydrogen filling stations, hydrogen storage containers and test stand equipment.

The thread, hex and diaphragm are machined from one piece of 316 L stainless steel, eliminating the risks associated with media compatibility, weld failures and contamination through an oil-filled cavity. The pressure transducer is packaged with an SAE-3 or SAE-4 pressure port, 0.5-4.5 V ratiometric output signal and Packard Metripack 150 electrical connection.

This hydrogen pressure sensor has been tested to a variety of hydrogen and automotive standards, including the TÜV compatibility standard created by the EIHP for compressed hydrogen gas components for onboard vehicle storage systems. The pressure sensor has passed all tests including media compatibility, ageing, corrosion resistance, endurance testing, pressure cycling, leakage testing, isolation, noise compatibility and hydraulic strength.

The AST2000H2 has an accuracy of ±0.5% FS and stability (1 year) of ±0.25% FS.