{"product_id":"mq-137-ammonia-detection-sensor-nh3-gas-sensor","title":"[discontinued] MQ-137 Ammonia Detection Sensor NH3 Gas Sensor","description":"\u003cp\u003e\u003cspan style=\"color: #339ccc;\"\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eSensitive material of MQ137 gas sensor is SnO2, which with lower conductivity in clean air. When the target combustible 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.\u003cbr\u003eMQ137 gas sensor has high sensitity to Ammonia, also to other organic amine. The sensor could be used to detect different gas which contains Ammonia, it is with low cost and suitable for different application.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #339ccc;\"\u003e\u003cstrong\u003eSpecifications:  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eModel No.: MQ137\u003c\/li\u003e\n\u003cli\u003eSensor Type: Semiconductor\u003c\/li\u003e\n\u003cli\u003eStandard Encapsulation: Bakelite (Black Bakelite)\u003c\/li\u003e\n\u003cli\u003eDetection Gas: Ammonia\u003c\/li\u003e\n\u003cli\u003eConcentration: 5-500ppm (Ammonia)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan style=\"color: #339ccc;\"\u003e\u003cstrong\u003eCIRCUIT:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLoop Voltage(Vc): ≤24V DC\u003c\/li\u003e\n\u003cli\u003eHeater Voltage(VH): 5.0V±0.2V AC or DC\u003c\/li\u003e\n\u003cli\u003eLoad Resistance(RL): Adjustable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan style=\"color: #339ccc;\"\u003e\u003cstrong\u003eCHARACTER:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeater Resistance(RH): 31Ω±3Ω Room Temp\u003c\/li\u003e\n\u003cli\u003eHeater consumption(PH): ≤900mW\u003c\/li\u003e\n\u003cli\u003eSensing Resistance(Rs): 2KΩ-15KΩ(in 50ppm NH3)\u003c\/li\u003e\n\u003cli\u003eSensitivity(S): Rs(in air)\/Rs(5000ppm CH4)≥5\u003c\/li\u003e\n\u003cli\u003eSlope(α): ≤0.6(R100ppm\/R50ppm NH3)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan style=\"color: #339ccc;\"\u003e\u003cstrong\u003eCONDITION:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTem. Humidity: 20℃±2\u003cspan\u003e℃\u003c\/span\u003e;65%±5%RH\u003c\/li\u003e\n\u003cli\u003eStandard test circuit: Vc:5.0V±0.1V; VH: 5.0V±0.1V\u003c\/li\u003e\n\u003cli\u003ePreheat time: Over 48 hours\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan style=\"color: #339ccc;\"\u003e\u003cstrong\u003eDocuments:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/s3-ap-northeast-1.amazonaws.com\/sain-amzn\/20\/20-011-993\/MQ137.zip%20\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick to download the manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #339ccc;\"\u003e\u003cstrong\u003ePackage List:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x MQ137 Ammonia detection sensor\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SainSmart","offers":[{"title":"Default Title","offer_id":14669718028323,"sku":"101-60-124","price":44.02,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0029\/6838\/7619\/products\/4_27_1.jpg?v=1557255143","url":"https:\/\/de.sainsmart.com\/es\/products\/mq-137-ammonia-detection-sensor-nh3-gas-sensor","provider":"SainSmart Deutschland","version":"1.0","type":"link"}