With it’s non-dispersive infrared (NDIR) sensor measuring CO2, CO2 ventilation rate, temperature and humidity while ensuring long-term stability and durability, the Tenmars ST-501 CO2 / Temperature / RH Monitor is ideal for building HVAC monitoring, indoor air quality surveying or locating combustible fumes.

Providing a large easy-to-read display, internal CO2 alarm buzzer and inbuilt parameters capable of adjusting CO2 reading for altitude changes, the Tenmars ST-501 is suitable for use in most environments.

The Tenmars ST-501 also offers data logging of up to 50,000 records and fast USB download (under 10 seconds), with easy-to-use PC software perfect for data analysis.