Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Sensor Type | Semiconductor Gas Sensor |
| Operating Voltage | 5V DC |
| Output Signal | Analog & Digital (TTL) |
| Detection Gases | CO2, NH3, NOx, Alcohol, Benzene, Smoke |
| Preheat Time | 24-48 Hours (Initial) |
| Operating Temperature | -10°C to 50°C |
| Operating Humidity | 10% to 90% RH |
| Module Dimensions | 32mm x 20mm x 22mm |
| Pin Interface | 4-Pin (VCC, GND, DO, AO) |
| Microcontroller Compatibility | Arduino, ESP32, Raspberry Pi, STM32 |
Anonymous
Mar 17, 2026
Rating: 3/5
Needs warm-up time
Didn't work right out of the box. Had to let it preheat for a day as stated. Works fine after that.
Anonymous
Mar 08, 2026
Rating: 5/5
Excellent value
Perfect for basic air quality monitoring. Not medical grade but great for hobbyist alerts.
Anonymous
Feb 07, 2026
Rating: 5/5
Great for Arduino Projects
Works perfectly with my Arduino Uno. Needed some calibration but readings are stable now.
Anonymous
Jan 24, 2026
Rating: 4/5
Good sensitivity
Detects smoke well. The potentiometer for sensitivity adjustment is useful. Just wish the documentation was clearer.
Anonymous
Jan 18, 2026
Rating: 5/5
Reliable Sensor Module
Bought five for our workshop. All functioning correctly. Good build quality for the price.
Q: Can this connect directly to 3.3V logic?
A: The module operates at 5V, but the analog output can be read by 3.3V boards with a voltage divider.
Q: Is this suitable for outdoor weatherproofing?
A: The module itself is not waterproof. You need an enclosure for outdoor use.
Q: How do I calibrate the sensor?
A: Use the onboard potentiometer to adjust the digital threshold. For analog values, calibration requires clean air baseline coding.
Q: What is the lifespan of the sensor?
A: Typically 1-2 years depending on usage environment and exposure to contaminants.
Q: Does it detect carbon monoxide specifically?
A: It detects CO among other combustible gases, but it is not specific to CO alone.
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