Model 7515 is a cost-effective meter for carbon dioxide (CO2) measurements. Models 7525 and 7545 simultaneously measure and data log multiple parameters. Model 7525 measures CO2, temperature, humidity, and calculates dew point, wet bulb temperature and % outside air. Model 7545 adds carbon monoxide (CO).

The TSI™ IAQ-Calc™ CO₂ Meter provides cost-effective CO₂ measurements. The sampling function records multiple point measurements.

What's included: NIST-traceable certificate, carrying case, manual, and four AA batteries.