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Air Quality Monitors

CO2, PM2.5 and VOC readings at home

2 products · 1 guide

Guides

Buying guide

Indoor Humidity Levels and the Best Hygrometers to Measure Them

What a hygrometer measures, EPA's 30 to 50% indoor humidity range, and four hygrometers and air monitors compared on stated accuracy, logging and placement.

Updated November 2, 2026Read

All air quality monitors (2)

Airthings

Radon, PM2.5, CO2 (NDIR), VOC, temperature, humidity, air pressure

Airthings View Plus Radon and Air Quality Monitor

A seven-sensor home monitor (radon, PM2.5, NDIR CO2, VOCs, temperature, humidity and pressure) with an e-ink display, Wi-Fi, and either battery or USB-C power.

Comes in 4 versions: see which to buy

Home office
Wildfire smoke season
Bedrooms

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TempPro

Temperature, relative humidity

TempPro TP50 Digital Indoor Thermometer and Hygrometer

A basic battery-powered thermo-hygrometer (sold for years as the ThermoPro TP50) with an LCD showing high and low records, a comfort indicator and three ways to place it.

Comes in 3 versions: see which to buy

Budget
Bedrooms
Nursery

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