{"id":14045,"date":"2021-02-03T12:51:45","date_gmt":"2021-02-03T17:51:45","guid":{"rendered":"https:\/\/blog.wika.com\/us\/\/?p=14045"},"modified":"2023-10-02T23:20:41","modified_gmt":"2023-10-03T04:20:41","slug":"hydrogen-vehicles-pressure-sensors-key-safety-component","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/us\/products\/pressure-products\/hydrogen-vehicles-pressure-sensors-key-safety-component\/","title":{"rendered":"Hydrogen Vehicles\u2019 Pressure Sensors Are Key to Safety"},"content":{"rendered":"
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The hydrogen tanks of fuel cell electric vehicles are under very high pressure. For safety and reliability, the pressure sensors and pressure transmitters in FCEVs must be able to withstand corrosion, vibration and shock, and hydrogen permeation\/embrittlement.<\/span><\/b><\/span><\/p>\n<\/div>\n

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A key criterion when choosing a particular hydrogen system is the amount of space available: the more fuel cells in the vehicle, the greater the driving range. Tank pressure is another important factor: the higher the pressure, the more hydrogen the vehicle can carry, and the longer its range. <\/span><\/p>\n<\/div>\n

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A tank pressure of 700 bar (~10,150 psi) is standard for cars. It used to be that the majority of buses, trucks, and mobile machinery had tanks with half that pressure. But a rethink is currently taking place, and the car standard is increasingly being applied to trucks and buses so they can go longer between refueling.<\/span><\/p>\n<\/div>\n

The Role of Pressure Sensors in Hydrogen Vehicles<\/h2>\n
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As the compressed hydrogen must drop from more than 5,000 or 10,000 psi to atmospheric pressure (~15 psi), pressure sensors play an important role in FCEVs. Furthermore, it is not enough for the sensors to be certified as suitable for hydrogen; they must also be developed specifically for use in tough operating conditions: shock and vibration, pressure spikes, moisture, extreme temperatures, and electromagnetic radiation. For example, IEC 60068-2-27 and IEC 60068-6 outline requirements for shock and vibration resistance, respectively. Standard industrial transmitters do not meet these and other specifications.<\/span><\/p>\n<\/div>\n<\/div>\n

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WIKA\u2019s Pressure Sensor for Hydrogen EVs<\/span><\/h2>\n<\/div>\n

WIKA\u2019s MH-3-HY OEM pressure sensor<\/a> meets the stringent requirements for use in FCEVs:<\/p>\n