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NigeriaEnglish Break through the 70MPa high-pressure hydrogen environmental monitoring problem and escort the safe development of the hydrogen energy industry
Hydrogen Energy Project Consulting Download Application Case Collection
Hydrogen energy hotline: +1 (314) 325-4420 | Email: info@doweston.com
According to the "China Hydrogen Energy Industry White Paper", the pressure demand of my country's hydrogen energy system will generally increase to 70MPa in 2025. Traditional pressure sensors face three major technical bottlenecks:
Hydrogen embrittlement effect:Penetration of hydrogen molecules causes embrittlement and rupture of the metal diaphragm
Micro leak detection:The diameter of hydrogen molecules is only 0.289nm, and conventional sealing fails.
Wide pressure range accuracy:Span measurement from 0.5MPa of hydrogen storage tank to 87.5MPa of hydrogen refueling station
| Parts | conventional model | PD310H hydrogen version | Performance improvements |
|---|---|---|---|
| Diaphragm material | stainless steel 316L | Hastelloy C276+PTFE coating | Hydrogen penetration resistance increased by 8 times |
| Sealed structure | Rubber O-ring | Metal bellows + graphite composite seal | Leak rate < 1x10⁻⁹ Pa·m³/s |
| Circuit protection | IP65 | IP68+Ex ia IIC T4 explosion-proof | Adapt to hazardous areas of hydrogen refueling stations |
Stack hydrogen supply pressure control:0.3-0.8MPa dynamic adjustment, response speed <10ms
Water and heat management monitoring:Integrated temperature compensation, -40°C cold start pressure drift <0.05%
Safety interlock:Trigger ECU shutdown within 0.5 seconds when pressure is abnormal
Hydrogen storage tank test:No plastic deformation for 2000 hours under 70MPa burst pressure
Hydrogenation gun monitoring:87.5MPa peak pressure sampling frequency 1000Hz
Pipeline leak detection:Accurate identification of pressure drop changes of 0.01MPa
Pain points:Vehicle bumps cause hydrogen leakage alarm in traditional sensor connector to be falsely triggered
Solution:PD310H-M12 shockproof type + vehicle CAN bus output
Results:The failure rate dropped by 92% and passed the GB/T 24549 fuel cell safety certification.
Q: What special certifications are required for pressure transmitters for hydrogen energy?
A: Three core certifications must be met: ①TSG 21-2016 Pressure Vessel Specification ②GB/T 35544-2017 Vehicle-mounted Hydrogen System Requirements ③ATEX Explosion Prevention Directive (Hydrogen Refueling Station Scenario)
Q: How to choose sensors for 70MPa and 35MPa systems?
A: Three key points are important: ① Diaphragm pressure margin (recommended ≥ 1.5 times working pressure) ② Long-term stability index ③ Whether it has hydrogen concentration compensation function (exclusive for PD310H)
Jointly developed the "High Pressure Hydrogen Sensor Testing Specifications" with the China Hydrogen Energy Alliance
Passed supply chain audits of leading companies such as Reshaping Technology and Guohong Hydrogen Energy
National Hydrogen Energy Quality Inspection Center Calibration Laboratory Authorization
Submit a request Download the hydrogen energy white paper
Technical consultation: info@doweston.com / +1 (314) 325-4420
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