# Temtop Air Quality Monitor LKC1000S+ 2nd, PM2.5 PM10 HCHO TVOC

Source: https://www.ranked10.co.uk/home/best-air-quality-monitor/temtop-lkc1000s-plus-2nd
Ranked #3 in "Best Air Quality Monitor 2026: Fewer Numbers, Better Sensors": https://www.ranked10.co.uk/home/best-air-quality-monitor

- Price: £129.99 (checked on Amazon UK on 2026-09-11)
- Amazon rating: 4.1 from 579 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B08DNJ8L55?tag=ranked10-21

Eight readings in one unit for £129.99: PM2.5, PM10, formaldehyde, TVOC, temperature, humidity and an AQI index, with a 12-hour particle graph and CSV export. The listing says the monitor is tested by the AQMD and that the formaldehyde channel uses a Dart electrochemical sensor, two claims specific enough to be worth something.

The reason it is third rather than higher is the record: 4.1 stars from 579 ratings, of which 11 per cent are one-star, the widest complaint spread among the mid-priced monitors here. Electrochemical sensors drift, and drift is what the complaints describe.

## Specification

| Field | Value |
|---|---|
| What it measures | PM2.5, PM10, HCHO, TVOC, AQI, temp, humidity |
| Testing as listed | Tested by the AQMD |
| Formaldehyde sensor | Dart electrochemical, pre-calibrated |
| Data | 12-hour PM2.5 graph, CSV export |
| Ratings | 4.1 from 579 |
| Item weight | 408 g |

## Questions people ask

**What does AQMD tested mean?**

The Air Quality Management District is a Californian regulator. The listing describes the unit as tested by it, which speaks to the design rather than to your individual unit.

**Does it measure CO2?**

No. This model covers particles, formaldehyde and VOCs plus temperature and humidity. The CO2 monitors here are the Aranet4, the Temtop C1 and the SONOFF.

**Why would it need recalibrating?**

Electrochemical formaldehyde sensors drift over months, which is what the one-star reviews usually describe. Follow the manual for the calibration routine.

**What is the AQI number?**

A derived index, not a measurement: the monitor converts the raw readings onto a 0-500 scale. The ug/m3 and ppm figures behind it are the ones to read.

**Can I export the data?**

Yes, the listing describes exporting seven indoor parameters to CSV for analysis.

**How many ratings does it have?**

579 at the time of collection, averaging 4.1 stars, with 63 per cent five-star and 11 per cent one-star.