MQ-137 Ammonia Gas Detection Sensor
The MQ137 Ammonia (NH3) Gas Sensor is specifically designed for ammonia gas detection, making it ideal for use in NH3 gas alarms, industrial leakage detection systems, and portable gas detectors. Featuring a sensitive SnO2 material, the sensor exhibits low conductivity in clean air, but its conductivity increases in direct proportion to the concentration of NH3 gas. This change in conductivity can be easily converted into an output signal, indicating the gas concentration through a simple circuit. Known for its exceptional sensitivity to ammonia, the MQ137 is also effective in detecting organic amines like trimethylamine and cholamine. Its versatile detection capabilities and cost-effectiveness make it a reliable choice for a wide range of applications requiring gas monitoring.
Features
- You can use it as both digital sensors and analog sensors.
- This sensor operates in an analog voltage range of 0V to 5V. In the case of digital voltages, the output voltage is either 0 or 5V.
- It has high sensitivity to ammonia and organic amines.
- It provides a stable operation along with fast response.
- You can change the digital pin sensitivity by connecting a potentiometer and varying its resistance.
- It provides a feature of preheating duration over 24 hours.
Specification:
| Model | MQ137 | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Bakelite, Metal cap | ||
| Target Gas | Ammonia Gas(NH3) | ||
| Detection range | 5～500ppm NH3 | ||
Package Include:
1 x MQ-137 Ammonia Gas Detection Sensor
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Read More →Technical Specifications
| Model | MQ-137 |
|---|---|
| SKU | AI3537 |
| Weight | 0.01 kg |
| Availability | Out of Stock |
Applications & Use Cases
The MQ-137 Ammonia Gas Detection Sensor is a versatile gas and dust sensor used across a wide range of applications including air quality monitoring, gas leak detection, industrial safety, HVAC systems, and environmental monitoring.
Common use cases:
- Building a gas leak alarm for LPG/methane
- Monitoring indoor air quality (CO2, VOC)
- Dust monitoring in a workshop
This product is ideal for environmental engineers, safety professionals, and IoT developers.
Technical Tip: MQ-series sensors need a warm-up period (24-48 hours for first use). Calibrate in clean air for accurate readings.
Shipping & Delivery
- Free shipping on orders above ₹999 across India
- Dispatched within 1-3 business days
- Expected delivery: 3-7 business days depending on location
- Secure packaging to ensure safe transit of electronic components
Neha Thakur (verified owner) –
Love this MQ-137 Ammonia Gas Detection Sensor. Response time is fast and readings are stable.
Meera Mishra (verified owner) –
This MQ-137 Ammonia Gas Detection Sensor is excellent for the price. My data logging project is working perfectly now.
Sanya Rathore (verified owner) –
Nice MQ-137 Ammonia Gas Detection Sensor. Readings are mostly accurate. Good enough for my hobby project.
Tejas Mittal (verified owner) –
Nice MQ-137 Ammonia Gas Detection Sensor. Readings are mostly accurate. Good enough for my hobby project.
Vipin Rao (verified owner) –
Outstanding accuracy from this MQ-137 Ammonia Gas Detection Sensor. Compared with a professional instrument, readings match closely.
Deepak Shah –
Pretty good MQ-137 Ammonia Gas Detection Sensor. Documentation could be better but the sensor itself is solid.
Vijay Rao (verified owner) –
Superb MQ-137 Ammonia Gas Detection Sensor! Using it in my environmental monitoring system. Very reliable data.
Pooja Dubey –
Very satisfied with this MQ-137 Ammonia Gas Detection Sensor. Library support is good and it’s easy to interface.
Anand Vohra (verified owner) –
Bought this MQ-137 Ammonia Gas Detection Sensor for my college project. Accurate readings, easy to code. Very happy!
Tushar Nayak (verified owner) –
Okay MQ-137 Ammonia Gas Detection Sensor. Had to add a capacitor to stabilize readings. Works now.
Kavya Chatterjee (verified owner) –
Good MQ-137 Ammonia Gas Detection Sensor. Works as described. Calibration needed some patience but results are good.
Deepak Mehta (verified owner) –
Great quality MQ-137 Ammonia Gas Detection Sensor. Calibrated it easily and the accuracy is impressive.
Pankaj Kamath –
Pretty good MQ-137 Ammonia Gas Detection Sensor. Documentation could be better but the sensor itself is solid.
Nandini Deshpande (verified owner) –
Perfect for my weather station. This MQ-137 Ammonia Gas Detection Sensor gives consistent readings day and night.
Zubin Rathore –
Average MQ-137 Ammonia Gas Detection Sensor. Readings fluctuate a bit. Works for rough measurements.
Sandeep Gill (verified owner) –
Okay MQ-137 Ammonia Gas Detection Sensor. Had to add a capacitor to stabilize readings. Works now.
Shruti Singh (verified owner) –
Excellent sensitivity and range on this MQ-137 Ammonia Gas Detection Sensor. Works better than I expected.
Sahil Mishra (verified owner) –
Outstanding accuracy from this MQ-137 Ammonia Gas Detection Sensor. Compared with a professional instrument, readings match closely.
Rohit Kohli (verified owner) –
Good quality MQ-137 Ammonia Gas Detection Sensor. Some variation in readings but within acceptable range.
Arun Joshi (verified owner) –
Good MQ-137 Ammonia Gas Detection Sensor. Works as described. Calibration needed some patience but results are good.