TECHNICAL DATA MQ-4 GAS SENSOR - SparkFun Electronics

HANWEI ELECTRONICS MQ-4 www.hwsensor.comTECHNICAL DATA MQ-4 GAS SENSORFEATURES* High sensitivity to CH 4 ,Natural gas.* Small sensitivity to alcohol, smoke.* Fast response . * Stable and long life * Simple drive circuitAPPLICATIONThey are used in gas leakage detecting equipments in family and industry, are suitable for detecting ofCH 4 ,Natural gas.LNG, avoid the noise of alcohol and cooking fumes and cigarette smoke.SPECIFICATIONSA. Standard work conditionSymbol Parameter name Technical condition RemarksVc Circuit voltage 5V±0.1 AC OR DCV H Heating voltage 5V±0.1 ACOR DCP L Load resistance 20KΩR H Heater resistance 33Ω±5% Room TemP H Heating consumption less than 750mwB. Environment conditionSymbol Parameter name Technical condition RemarksTao Using Tem -10℃-50℃Tas Storage Tem -20℃-70℃R H Related humidity less than 95%RhO 2 Oxygen concentration 21%(standard condition)Oxygenconcentration can affect sensitivityC. Sensitivity characteristicminimum value isover 2%Symbol Parameter name Technical parameter Ramark 2Rs Sensing Resistance 10KΩ- 60KΩ(1000ppm CH 4 )α(1000ppm/ Concentration slope rate ≤0.65000ppm CH 4 )StandardTemp: 20℃±2℃ Vc:5V±0.1detectingconditionHumidity: 65%±5% Vh: 5V±0.1Preheat timeOver 24 hourD. Strucyure and configuration, basic measuring circuitDetecting concentrationscope:200-10000ppmCH 4 , natural gasParts Materials1 Gas sensing SnO 2layer2 Electrode Au3 Electrode line Pt4 Heater coil Ni-Cr alloy5 Tubular ceramic Al 2O 36 Anti-explosionnetworkStainless steel gauze(SUS316 100-mesh)7 Clamp ring Copper plating Ni8 Resin base Bakelite9 Tube Pin Copper plating NiFig. 1Fig.2Configuration AConfiguration BA 向A 向TEL:86-371-67169080 FAX: 86-371-67169090 E-mail: sales@hwsensor.com