... Sensor 4. Stable and Durable 5. Excellent Smoke Resistant Performance CA-386D Hydrogen detector with ValveFeatures:Detection Gas: manufactured gas (hydrogen), ... outputMaterial of Shell: ABS, electrostatic resistance surfaceSpecifications: Model:CA-386DAlarm Concentration:Hydrogen:125~750*10-6,Natural Gas:1 ... Time:≤20 SDimension:130X80X50 (mm)OEM, ODM are welcome CA-386D Hydrogen detector with Valve