Used for detecting methane and natural gas, using a multi-layer thick film manufacturing process, heaters and metal oxide semiconductor gas sensing layers are made on both sides of the micro ceramic substrate, and packaged in a metal shell. It has the characteristics of strong anti-interference ability, good stability, high sensitivity, and fast response recovery. Using a simple driving circuit can output signals, with a small size and easy integration. Can be applied to gas detection, gas alarms, safety fire detection, etc.

Gas type：Methane, natural gas

Sensing range：1-25% LEL

Sensing principle：semiconductor

Detection method：Free diffusion type

Sensitive body resistance：5 k Ω~20 k Ω (in 5000 ppm methane)

Sensitivity：RS (in air)/RS (in 5000 ppm methane) ≥ 5

Concentration slope：≤ 0.5 (R5000 ppm/R1000 ppm methane)

response time：T90 ≤ 20 s

Loop voltage：VC ≤ 24 V

Heating voltage：5.0 V ± 0.1 V AC or DC

Heating resistance75 Ω ± 5 Ω

Heating power consumption：PH ≤ 350 mW

Load resistance：Adjustable

working temperature：-10 ℃~50 ℃

Working humidity：20% RH~90% RH

Preheating time：Not less than 48 hours

Oxygen concentration：21% (not less than 18%)