Under $50
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LYFDUW Indoor Air Quality Monitor for CO2 TVOC HCHO Temp Hum
Comprehensive indoor air quality monitor tracking CO2, VOCs, formaldehyde, temperature, and humidity.
YISPK Air Quality Monitor with CO2/HCHO/TVOC/Temperature/Humidity
A comprehensive air quality monitor that tracks CO2, formaldehyde, and more in real-time.
REFUNDONE 5-in-1 Air Quality Monitor CO2 Formaldehyde TVOC
5-in-1 air quality monitor for a comprehensive health snapshot at a glance.
$50 - $100
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PinoTec 5-in-1 Air Quality Monitor | CO2 Formaldehyde TVOC Humidity Temperature
A rare 5-in-1 monitor that detects both CO2 and formaldehyde for complete air quality insight.
Amazon Smart Air Quality Monitor
A compact, app-connected monitor that makes your home's invisible air quality easy to see and understand.
$100 - $200
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MORPTRA Air Quality Monitor with AQI and Alarms
A smart air monitor with real-time AQI alerts for your health.
Qxpztk E1 10-in-1 Air Quality Monitor CO2 PM2.5
10-in-1 air quality monitor for CO2, PM2.5, formaldehyde, and VOC detection.
WGRLIT Smart Air Quality Monitor PM2.5 Detector
A sensor without listed specs is a gamble, not a monitor—skip this until features are confirmed.
AirWhisper Air Quality Monitor with PM2.5, CO2, TVOC, HCHO, Temp & Humidity
Comprehensive air quality monitor tracking six key pollutants for total indoor health awareness.
AirWhisper Air Quality Monitor with AQI Detector
Air quality monitor with real-time AQI detection for your home's health.