Looking for Mq-131 Module? MQ-131 Ozone Gas Detector Sensor Module is available at Zbotic with fast shipping across India.
MQ-131 Ozone Gas Detector Sensor Module
The MQ131 gas sensor utilizes O3 SnO2 as its sensitive material, which exhibits lower conductivity in clean air. However, when ozone gas is present, the sensor’s conductivity increases proportionally with the concentration of the gas. By employing a simple electronic circuit, the change in conductivity can be converted into a corresponding output signal representing the gas concentration. The MQ131 gas sensor demonstrates high sensitivity to ozone and is also responsive to other gases such as O3, CL2, NO2, among others.
Features:
- Fast response characteristics
- Mounting holes to facilitate fixed installation.
- The probe can plug design for easy testing.
- Signal light indicates the output.
- Dual signal output (analog output, and TTL-level output)
- TTL output valid signal is low; (low output signal light, can be accessed by the microcontroller IO port)
- Analog output increases with the concentration, the higher the voltage the higher the concentration
- The ozone gas with high sensitivity (detection concentration range 10PPB-2PPM Ozone)
- Long life and reliable stability
Specification:
| Parameter | Value |
|---|---|
| Gas Detected | Ozone (O3) |
| Sensing Material | O3 SnO2 |
| Sensitivity | High |
| Operating Voltage | 5V DC |
| Heating Voltage | 5V DC |
| Load Resistance | Adjustable |
| Concentration Range | 10 to 1000 ppm (parts per million) |
| Operating Temperature | -10°C to 50°C |
| Dimensions | 32mm x 22mm x 20mm |
| Weight | Approximately 5g |
| Output Signal | Analog |
| Preheat Time | Approximately 48 hours |
| Response Time | <10 seconds |
| Recovery Time | <30 seconds |
| Lifespan | >5 years |
| Sensitivity Adjustment | Potentiometer |
| Circuit Compatibility | Analog and Digital |
| Application | Air quality monitoring, Ozone detection |
| Package | DIP (Dual Inline Package) |
Package Includes:
1 x MQ-131 Ozone Gas Detector Sensor Module
Datasheet:-
https://www.alldatasheet.com/datasheet-pdf/pdf/1307644/WINSEN/MQ131.html
MQ-131 Ozone Gas Detector Sensor Module Overview
The MQ-131 Ozone Gas Detector Sensor Module is a compact sensing board that detects ozone concentration by measuring changes in the conductivity of its O3-sensitive SnO2 element. It converts gas-induced conductivity shifts into both analog and TTL outputs, making it ideal for real-time air quality monitoring and safety alarm systems.
Key Features of MQ-131 Ozone Gas Detector Sensor Module
- Fast response characteristics for near-instant detection of ozone variations
- Dual signal output: analog voltage proportional to concentration, TTL-level digital signal
- TTL output valid signal is low; LED indicator lights when digital output is active
- Probe plug-in design simplifies sensor replacement and maintenance
- Mounting holes on PCB for secure, fixed installation in monitoring stations
- Genuine MQ-131 modules with fast shipping from Zbotic across India
Applications and Use Cases
- Indoor air quality monitors to track ozone levels in homes and offices
- Environmental sensing stations for urban ozone pollution studies
- Safety interlock in ozone sterilization equipment and generators
- Industrial process controls where ozone leaks must be detected
- Integration into HVAC systems for continuous ozone monitoring
- Educational and DIY electronics projects involving gas sensing
How to Use MQ-131 Ozone Gas Detector Sensor Module
Power the module with a clean DC supply (commonly 5 V), allow the sensor to preheat for a few minutes until readings stabilize, then connect the analog output to an ADC input and the TTL pin to a digital I/O on your microcontroller. Secure the board using the mounting holes, place the probe in the measurement zone, and monitor the LED indicator for real-time alert when ozone concentration exceeds threshold.
Why Buy from Zbotic?
- Genuine Products: All items sourced from authorized distributors
- Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
- Free Shipping: Free delivery on qualifying orders
- COD Available: Cash on Delivery, UPI, cards, net banking
- Technical Support: Expert help for setup and troubleshooting
- Easy Returns: Hassle-free replacement for defective products
Frequently Asked Questions
What gases can the MQ-131 detect besides ozone?
While optimized for O₃, the MQ-131’s SnO₂ sensing layer also shows sensitivity to chlorine (Cl₂) and nitrogen dioxide (NO₂), producing a conductivity change when these gases are present.
How do I interpret the TTL output signal?
The TTL output goes low when ozone concentration crosses the module’s detection threshold. During a valid low signal, the onboard LED illuminates, and you can read the low state directly with a microcontroller digital input.
How should I mount and maintain the sensor?
Use screws through the PCB’s mounting holes to secure the module in a well-ventilated area away from direct airflow. For consistent accuracy, replace the plug-in probe periodically and keep the sensing element free of dust.
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Read More →Technical Specifications
| Model | MQ-131 |
|---|---|
| SKU | AI2541 |
| Weight | 0.01 kg |
| Availability | In Stock |
Applications & Use Cases
The MQ-131 Ozone Gas Detector 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
