Sensor Mq137 Tanpa Module Mq 137 Nh3 Ammonia Gas

Stock Silahkan Tanyakan dulu. Tidak menerima Dropshipping Deskripsi Produk: The gas sensing material used in the MQ137 gas sensor is tin dioxide (SnO2) with lower conductivity in clean air. When ammonia is present in the environment in which the sensor is located, the conductivity of the sensor increases as the concentration of ammonia in the air increases. The change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit. The MQ137 gas sensor is highly sensitive to ammonia and is ideal for monitoring other organic amines such as trimethylamine and ethanolamine. This sensor detects a wide range of ammonia-containing gases and is a low-cost sensor for a wide range of applications. Features: This product has good sensitivity to ammonia in a wide concentration range, and has the advantages of long life, low cost, and simple driving circuit. application: Widely used in household ammonia alarms, industrial ammonia leak alarms and portable ammonia detectors. Parameter: Product Type: Semiconductor Gas Sensor Standard package: bakelite, metal cover Detection gas: ammonia Detection concentration: 5 ~ 500ppm ammonia Loop voltage Vc: ≤24V DC Heating voltage VH : 5.0V ± 0.1V AC or DC Load resistance RL: adjustable Heating resistance RH : 29 Ω ± 3 Ω (room temperature) Heating power consumption PH : ≤900mW Sensitivity S : Rs (in air) / Rs (50ppm NH3) ≥ 2 Output voltage △Vs: ≥0.5V (in 50ppm NH3) Concentration slope α : ≤ 0.6 (R200ppm / R50ppm NH3) Temperature, humidity: 20 °C ± 2 °C; 55% ± 5% RH Standard test circuit: Vc: 5.0V ± 0.1V; VH: 5.0V ± 0.1V Warm-up time: no less than 48 hours Oxygen content: 21% (not less than 18%, (oxygen concentration will affect the initial value, sensitivity and repeatability of the sensor, please consult when using at low oxygen concentration) Life expectancy: 5 years