Sensors & Modules
The MQ135-MQ2 Air Quality Sensor Module measures gas contaminants like ammonia, benzene, CO2, alcohol, and smoke using a tin oxide (SnO_2) sensing element. Operating at 5V DC, it features dual outputs: an analog 0–5V signal for concentration profiling and a digital TTL output with an onboard potentiometer threshold adjustment.
Specifications:
- Sensor Type: MQ-135 Air Quality Sensor Module
- Operating Voltage: 5V DC
- Target Gases: Ammonia (NH3), Hydrogen Sulfide (H2S), Benzene, Alcohol, CO2, and Smoke
- Signal Outputs: Dual output - 0-5V Analog (A0) and TTL Digital (D0 via onboard LM393 comparator)
- Sensitivity Control: Adjustable digital switching threshold via onboard 10k potentiometer
- Response & Warm-up Time: <10 seconds response time; ~20 seconds initial warm-up (up to 24h burn-in for baseline stability)
- Operating Temperature: -10°C to 50°C
- Hardware Integration: 4-pin header interface (VCC, GND, A0, D0) with onboard power and signal LEDs
Use the form to request the item, and we will check the availability and get back to you through email when we have processed your request.