MQ137 Ammonia Gas Sensor
Sensitive material of MQ137 gas sensor is SnO2, which with lower conductivity in clean air. When NH3 gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
MQ137 gas sensor has high sensitivity to NH3 gas, also can monitor organic amine such as trimethylamine, cholamine well. It can detect kinds of gases including ammonia and is a kind of low-cost sensor for kinds of applications.
It is widely used in civil odor gas NH3 ammonia alarm, industrial NH3 hazardous gas leakage alarm, portable NH3 gas detector.
It has good sensitivity to NH3 gas in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
|Standard Encapsulation||Bakelite, Metal cap|
|Target Gas||Ammonia Gas(NH3)|
|Detection range||5～500ppm NH3|
|Standard Circuit Conditions||Loop Voltage||Vc||5.0V±0.1V DC|
|Heater Voltage||VH||5.0V±0.1V AC or DC|
|Sensor character under standard test conditions||Heater Resistance||RH||30Ω±3Ω (room temp.)|
|Output Voltage||△Vs||≥0.5V (in 50ppm NH3)|
|Standard test conditions||Tem. Humidity||20℃±2℃；55%±5%RH|
|Standard test circuit||Vc:5.0V±0.1V； VH: 5.0V±0.1V|
|Preheat time||Over 48 hours|
* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.
Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.
The sensors don't have sleeping mode. It can be set in program if needed.
All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.
The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.
15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.
Our sensors are certified with UL, CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.
Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.
Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to email@example.com
Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.
LEADING GAS SENSING SOLUTION SUPPLIER
ZW-RCl101 residual chlorine water quality sensor module
Low power consumption, high precision, linear output, easy calibration and good stability.VIEW MORE
Electrochemical HCHO Formaldehyde Sensor Module ZES10-CH2O
High sensitivity &resolution, Good stability,Low power consumption, Excellent Linear outputVIEW MORE
FR08-H0A Thermal Mass Gas Flow Sensor
MEMS thermal principle
Modular design, New generation of MEMS sensor chipVIEW MORE
MR007 CH4 Methane C3H8 Propane Gas Sensor
Increased stability, high accuracy, high sensitivity, great linearity and repeatabililtyVIEW MORE
Electrochemical Carbon Monoxide Gas Sensor Module ZE730-CO
High temperature resistance, fast response, low power consumption, high precision, long lifeVIEW MORE
Electrochemical HCHO Formaldehyde Sensor Module ZE08B-CH2O
High sensitivity &resolution, Low power consumptionVIEW MORE