AST2000H2 sensor measures hydrogen-pressure
An
American Sensor Technologies product story
Edited by the Engineeringtalk editorial team
Sep 3, 2009
American Sensor Technologies (AST) has released the AST2000H2 pressure sensor/transducer for hydrogen-pressure measurement applications.
The AST2000H2 is packaged with an SAE-3 or SAE-4 pressure port, 0.5-4.5V Ratiometric output signal, Packard Metripack 150 electrical connection and optional one per cent total error band.
It is designed for applications including PEM fuel cells, onboard vehicle-cylinder pressure measurement, hydrogen-regulator pressure measurement, hydrogen filling stations, hydrogen-storage containers and test-stand equipment.
The AST2000H2 features AST's Krystal Bond technology pressure-sensing element.
The thread, hex and diaphragm are all machined from one piece of 316L SS, eliminating the risks associated with other sensor technologies including media compatibility, weld failures and contamination through an oil-filled cavity.
The AST2000H2 was tested to the TUV compatibility standard created by the EIHP (European Integration Hydrogen Program) for Compressed Hydrogen Gas (CGH2) components for onboard vehicle storage systems.
The pressure sensors passed all tests including media compatibility, aging, corrosion resistance, endurance testing, pressure cycling, leakage testing, isolation, noise compatibility and hydraulic strength.
The thick diaphragm of the 900-bar (13,053.4 PSI) pressure sensors held the 1,800-bar burst pressure test and continued to operate above 2,400-bar until the O-ring extruded.
The AST2000H2 is constructed to meet the environmental conditions associated with hydrogen-pressure measurements.
The product was also tested and approved by Detroit Testing Laboratories to an environmental test for approval on the Hydrogen Hyway 2/3.
Each sensor is packaged with a welded stainless-steel housing and sealed Packard Metripack 150 electrical connection.
The test batch of 60 pressure sensors was subjected to various shock, vibration, and environmental tests and withstood thermal, mechanical and drop tests.
Environmental testing included humidity storage and cycling, chemical testing, water spray, salt fog, storage temperature and dust.
The AST2000H2 passed separate electrical environmental tests conducted by Underwriters Laboratories to the Ford ES-XW7T-1A278-AC and Daimler Chrysler DC-10614 EMC (Electro-Magnetic Compatibility) specifications to 300V/m of interference.
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