MQ136

MQ136 Semiconductor Sensor for Sulfur Dioxide Sensitive material of MQ136 gas sensor is SnO2, which with lower conductivity in clean air. When the target SO2 gas exist, the sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration. MQ136 gas sensor has high sensitity to SO2, also could be used to detect other vapor which contains Sulfur. It has low sensitivity to normal combustible gases, which is with low cost and suitable for different application. Character * Good sensitivity to SO2 * Long life and low cost * Simple drive circuit Configuration Application * Domestic SO2 concentration detector * Industrial SO2 leakage detector * Portable SO2 detector Technical Data Basic test loop Model No. MQ136 Sensor Type Semiconductor Standard Encapsulation Bakelite (Black Bakelite) Detection Gas SO2 Concentration 1-200ppm (SO2) Circuit Loop Voltage Heater Voltage Load Resistance Vc VH RL ≤24V DC 5.0V±0.2V ACorDC Adjustable Heater Resistance RH 31Ω±3Ω（Room Tem.） Character Heater consumption Sensing Resistance PH Rs ≤900mW 2KΩ-20KΩ(in 50ppm SO2) Sensitivity S Rs(in air)/Rs(50ppm SO2)≥3 Slope α ≤0.6(R100ppm/R50ppm SO2) Tem. Humidity 20℃±2℃；65%±5%RH Condition Standard test circuit Vc: 5.0V±0.1V； VH: 5.0V±0.1V Preheat time Over 48 hours Power of Sensitivity body(Ps): Ps=Vc2×Rs/(Rs+RL)2 Vc VRL RL VH GND The above is basic ...