| Price | $3 |
|---|---|
| Category | Sensors |
| Availability | In stock |
| Delivery | Shipped across Lebanon, or collect from the lab |
A tin-dioxide sensor for carbon monoxide, the odourless gas that comes off burning fuel, on the same 4-pin carrier as the rest of the MQ family. Its heated element falls in resistance as CO rises; the board gives an analog voltage on AO and a comparator output on DO that trips at a threshold set by the onboard trimmer. Runs from 5V and needs a warm-up before readings settle. Good for a garage CO warning, though it reports a trend rather than calibrated ppm.
Key features
- Detects carbon monoxide (CO)
- Analog output (AO) plus adjustable digital trigger (DO)
- 5V supply, heated sensing element
- Needs warm-up time before readings settle
- Reports a trend - calibrate it for real ppm figures
- Not a substitute for a certified CO alarm
Details
Specifications
| Model | MQ-7 |
|---|---|
| Detects | Carbon monoxide (CO) |
| Detection range | About 10-500 ppm |
| Operating voltage | 5V DC |
| Output | Analog (AO) plus digital threshold (DO), trimmer set |
| Pins | VCC, GND, DO, AO |
