20pcs MP-4 Gas Sensor Methane Sensor Detecting Combustible Methane Gas at Semiconductor Combustible DIY for Safety Detec

Overview The MP 4 methane sensor uses a multi layer thick film manufacturing process to fabricate aand a metal oxide semiconductor gas sensing layer on both sides of aAl2O3 ceramic substrate which are packaged in a metal case The conductivity of the sensor changes when there is a detected gas in the ambient The higher the concentration of the gas the higher the conductivity of the sensor This change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit Characteristics The sensor has good sensitivity to methane in a wide concentration and has the advantages of strong anti interference ability low power consumption quickly response recovery good stability long life low cost and simple driving circuit Application Combustible gas leak monitoring device for home factory commercial use fire safety detection system Combustible gas leak alarm gas leak detector   Note The above figure shows the basic test circuit of the MP 4 sensor The sensor requires two voltages to be applied voltage VH and test voltage VC The VH is used to provide a specific operating temperature for the sensor either DC or AC The VRL is the voltage across the load resistor RL of the sensor in series VC is the voltage for testing the load resistor RL and requires a DC power supply Package Included 20 x MP 4 Gas Sensor Methane Sensor Detecting Combustible Methane Gas