MQ131/136/137/138/139 Gas Sensor Kit O3 H2S NH3 CH2O Refrigerant for Arduino

High-concerned chemical：None Theory：Resistance Sensor Material：Mixture Type：Gas Sensor Output：Analog Sensor Brand Name：SZYTF Use：Gas Sensor Origin：Mainland China

High-concerned chemical: None Theory: Resistance Sensor Material: Mixture Type: Gas Sensor Output: Analog Sensor Brand Name: SZYTF Use: Gas Sensor Origin: Mainland China