Product Description
MQ-137 Ammonia Gas NH3 Sensor Module
The MQ137 sensor is a gas sensor module is specially designed to detect and sense gases like ammonia (NH3) and carbon monoxide (CO). The MQ137 gas sensor module comes with digital pins that can be connected to a microcontroller like Arduino boards and come in handy when you are only trying to detect one particular gas.
Applications of MQ137 Gas Sensor
- Detector measure Gases like NH3 or CO
- Air quality monitor
- Gas leak alarm
- Safety standard maintenance
- Maintaining environmental standards in hospitals
How to detect gases with the MQ-137 gas sensor module?
- Power the gas sensor module with 5V and you should notice the power LED on the module glow.
- When no gas is detected the output LED will remain turned off meaning the digital output pin will be 0V.
- These sensors need pre-heating time before they can actually be used.
- Introduce the sensor to the gas you want to detect and you should see the output LED go high along with the digital pin, if not use the potentiometer until the output gets high.
Features:
- Wide detecting scope
- Fast response (less than 1s)
- High sensitivity( 3%)
- the circuit voltage: DC5V
- Stable and long life
- Analog output voltage: 0V to 5V
- Digital output voltage: 0V or 5V (TTL Logic)
- Can be used as a digital or analog sensor
- The sensitivity of digital output can be adjusted using an onboard potentiometer
- The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)
- The voltage of the analog output, the higher the concentration, the higher the voltage.
- Arduino compatible
Package Includes:
1 x MQ-137 Ammonia Gas NH3 Sensor Module
Datasheet:-
https://www.alldatasheet.com/datasheet-pdf/pdf/1307654/WINSEN/MQ137.html
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Read More →Technical Specifications
| Model | MQ-137 |
|---|---|
| SKU | AI2543 |
| Weight | 0.0 kg |
| Availability | In Stock |
Applications & Use Cases
The MQ-137 Ammonia Gas NH3 Sensor Module 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
