Temtop M2000 2nd

At a glance

• In its favour
• Plain fact
• Worth knowing
• Not stated by the maker

• Plain fact: Type the night’s high each morning
• Plain fact: Plug it in overnight (battery lasts 6 to 8 hours)
• Not stated by the maker: Self-calibration not stated by the maker
• Not stated by the maker: Altitude correction not stated

With HouseExhale

The app looks at your bedroom’s CO₂ across the night and checks it against the 800 ppm goal. Here’s how this monitor’s nights get in.

Finding last night’s high

Open its 24-hour curve each morning and look at last night’s CO₂ history. Note the highest point while people were asleep, and type it in the app.

Where to put it: about head height, at least 2 ft from anyone’s face, away from windows, doors and vents, and in the same spot every night. More on placement

Calibrating it

• Not stated by the maker: Self-calibration not stated by the makerNot stated by the maker

Retailers say it has a calibration function for the CO₂ and formaldehyde sensors; no steps found

Outdoor air is about 425 ppm. Outside in the shade, a good monitor settles between about 400 and 450 within 15 to 30 minutes. Many monitors treat fresh air as 400, so 400 to 420 is normal. Can I trust my monitor?

Specs

Sensor and accuracy

True CO₂ (NDIR, S8-series), ±(50 ppm + 5%), plus particles. Temtop’s own page also lists ±(40 ppm + 3%), so its accuracy is unsettled

Self-calibration

Not stated by the maker

Corrects for altitude

Not stated by the maker

Also measures

PM2.5, PM10, formaldehyde (HCHO), temperature and humidity; another retailer adds particle count

CO₂ range

0–5,000 ppm, per a retailer

How often it updates

Not stated by the maker

Power

Battery lasts 6 to 8 hours, so plug it in overnight

Screen

Color screen with a 24-hour curve

History

Downloads to a computer over USB

App

Its 24-hour curve

Exports a CSV

No

Connects by

No wireless connection found. Data exports as a CSV file to a computer over USB.

Alarm

An audio alarm (buzzer or indicator) when levels get too high; retailers don’t give the default level or how to set it

Smart home

Not stated by the maker

Size

223.5 × 73.5 × 37.5 mm (8.8 × 2.8 × 1.4 in), per a retailer

Weight

0.9 kg (1.98 lb), per a retailer. That seems high for a handheld, and no maker figure was found to check it.

Works in

0–50 °C and 0–90% humidity, at normal air pressure, per a retailer

In the box

The monitor, a USB cable and a user manual, per a retailer

Warranty

1 year, per a retailer in the UAE

Specs from the maker’s own pages, checked October 12 and October 17, 2026. “Not stated by the maker” means no maker page we could open says.

Turning ventilation up

It has no wireless connection, so it is for measuring. To have an HRV or ERV turn itself up on CO₂, the usual way is a CO₂ control wired to the unit; your monitor then checks that it works.

CO₂ controls · Make the system you have turn up by itself

Before you buy

• Plain fact: About $190–$210 before tax and shipping$209.99 at Temtop’s US store; $189.99 at Elitech, sold out.

About $190–$210, checked October 2026. Prices change often; we checked at the maker’s store and large US retailers. Any monitor that measures true CO₂ works with HouseExhale, and one is enough: move it between rooms.

Compare it

The monitors closest to it in price.

• 

  Aranet4 HOME

  About $150–$190

  Keeps the night in its own memory, so the Android app reads it in the morning. Two AA batteries last years.

• 

  AirGradient ONE

  About $230

  Sends readings over Wi-Fi to a dashboard that exports a CSV, so nothing depends on your phone. Needs a plug.

Compare the three side by side