Etokfoks Digital Air Quality Monitor 5 in. 1 Multi-Functional CO2 Detector MLSA01-1LT052 - The Home Depot

UEi Combustible Gas Leak Detector CD100A is engineered for both residential and commercial applications. The semiconductor sensor responds to all combustible gases, and provides accurate, consistent detection. A flexible 18 in. wand allows you to pinpoint the location of the combustible gas leak, and to check if the work you have completed was successful. Adjustable tic rate increases as the sensor wand nears the leak.

Uei CD100A - Combustible Gas Leak Detector

TRIPLETT CO2 Monitor GSM250 - The Home Depot

Etokfoks Digital Mini CO2 Meter Detector with Air Temperature Monitoring and Humidity Air Analyzer MLSA01-1LT053 - The Home Depot

With its inductive signal detection, the TEMPO Communications 501 Tracker II can be used on active or dead systems. Now you can trace the path and determine the depth of buried wires, cables and metallic pipes or conduit and find the ends of a cut cable without having to deactivate the systems. Trace over distances to 4,000 ft. (1.2 km) and depths to 7 ft. (2.2 m). Includes transmitter assembly, receiver assembly, inductive coupler (clamp), inductive antenna (built-in), two 8 ft.

Tempo 501 Underground Cable and Wire Locator

5 In1 Indoor Air Quality Monitor CO2 HCHO TVOC AQI Meter Detector Tester

The Triplett GSM250 Desktop Indoor Air Quality CO2 Meter can be used to monitor air quality in office buildings, schools, exhibition halls, shopping malls, meeting rooms, fitness centers, restaurants and other public places. It simultaneously displays CO2, Temperature and Relative Humidity. It can be used on the desktop or wall mounted and has a display with a light bar for easy reading from long distances. A 3-color light bar (green / yellow / red) changes color with CO2 concentration.

Triplett GSM400 Portable Indoor Air Quality CO2 Meter

Etokfoks Digital Mini CO2 Meter Detector with Air Temperature Monitoring and Humidity Air Analyzer MLSA01-1LT053 - The Home Depot

UEi Test Instruments Portable Wireless Carbon Monoxide Detector COA2 - The Home Depot

Etokfoks Digital Air Quality Monitor 5 in. 1 Multi-Functional CO2 Detector MLSA01-1LT052 - The Home Depot

Klein Tools Carbon Monoxide Tester ET110 - The Home Depot