# Temtop M2000 2nd Air Quality Monitor, PM2.5 PM10 CO2 HCHO

Source: https://www.ranked10.co.uk/home/best-air-quality-monitor/temtop-m2000-2nd
Ranked #2 in "Best Air Quality Monitor 2026: Fewer Numbers, Better Sensors": https://www.ranked10.co.uk/home/best-air-quality-monitor

- Price: £158.64 (checked on Amazon UK on 2026-09-11)
- Amazon rating: 4.2 from 266 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B07DHYG2VK?tag=ranked10-21

The Temtop M2000 2nd measures seven things — CO2, PM2.5, PM10, particle counts, formaldehyde, temperature and humidity — and unlike almost every listing in this category it names the sensor brands: SenseAir for CO2, Dart for formaldehyde, Sensirion for temperature and humidity, and a Temtop laser sensor for particles.

It takes second place for that transparency and for the sensor set, with 4.2 stars from 266 ratings. One published figure does not survive a second reading: ±0.1 µg/m³ for particles is the sensor's resolution rather than the instrument's accuracy, which no consumer monitor achieves.

## Specification

| Field | Value |
|---|---|
| What it measures | CO2, PM2.5, PM10, HCHO, temp, humidity |
| Sensors as listed | SenseAir NDIR, Dart, Sensirion, Temtop laser |
| Accuracy as listed | ±0.1 ug/m3 for particles, ±1 PPM CO2 |
| Extra features | Audio alarm with mute, CSV export |
| Ratings | 4.2 from 266 |
| Item weight | 1.02 kg |

## Questions people ask

**What does it measure?**

CO2, PM2.5, PM10, particle counts, formaldehyde (HCHO), temperature and humidity, with an audio alarm and CSV data export.

**Which sensors does it use?**

The listing names a Temtop laser particle sensor, a SenseAir NDIR CO2 sensor, a Dart electrochemical formaldehyde sensor and a Sensirion temperature and humidity sensor.

**Is the ±0.1 µg/m³ accuracy real?**

It is the particle sensor resolution rather than the instrument accuracy. Laboratory particle monitors quote around ±10 per cent, so treat the figure as a data sheet value.

**Does it need calibration?**

The listing describes pre-calibrated sensors. Follow the manual if readings drift, as with every electrochemical sensor.

**Is it portable?**

Not really: it weighs 1.02kg and stands 29cm tall, so it lives on a shelf. The Aranet4 is the portable option.

**How many ratings does it have?**

266 at the time of collection, averaging 4.2 stars, with 59 per cent five-star and 8 per cent one-star.