Application: Hydrogen gas, Coal gas Detection range: 100 ~ 10000ppm Characteristics: Ppm hydrogen gas Sensitivity: R in air / r in typical gas ≥ 5 The sensitive resistance of the body: 1 K Ω ~ 20 K Ω in 1000 P PM hydrogen Response time ≤ 20 s Recovery time ≤ 40 s Heating resistance of 31 Ω ± 3. Heating current ≤ 180mA Heating voltage 5.0 V ± 0.2 V Heating power ≤ 900 mW Voltage measurement ≤ 24 V working Environment temperature: -20 ° C ~ + 55 ° C Humidity: ≤ 95% RH Environmental oxygen content: 21% Storage conditions Temperature: -20 ° C ~ + 70 ° C Humidity: ≤ 70% RH