CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels $27 at Amazon

$27 $55

New price low. Amazon has the CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels on sale for $27 with free shipping on $35+ or with Prime. Includes alarm if CO2 level exceeds 1880ppm. Measures humidity, temperature, HCHO, and TVOC. Also displays date & time. 

$27 retail: $55
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swreynolds
swreynolds
Ben's cred: 1311
Posted 11/30/2025 at 12:03 PM PT
Posted 11/30/2025 at 12:03 PM PT
20% one star reviews. Apparently its readings are inconsistent. But if you want a clock and temperature reading...
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CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 12/04/2025 in Heating & Cooling
Amazon

CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 12/02/2025 in Heating & Cooling
Amazon

CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 12/01/2025 in Heating & Cooling
Amazon

CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 11/30/2025 in Heating & Cooling
Amazon

CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 11/25/2025 in Heating & Cooling
Amazon

CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 11/21/2025 in Heating & Cooling
Amazon

CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 10/17/2025 in Heating & Cooling
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CIS 7-in-1 Indoor Air Quality Monitor w/ CO2 Levels at Amazon

Posted 09/26/2025 in Heating & Cooling