TSI IAQ-Calc 7545 Indoor Air Quality Monitor
Low-drift NDIR CO2 sensor for stable, accurate readings. Measures CO, CO2, temperature, humidity. Calculates percent outside air, dewpoint, and wet bulb temperature. Logs up to 26900 data points with time and date stamp. Continuous logging for full-cycle monitoring and trend analysis. Statistics function displays average, maximum, and minimum values, and the number of recorded samples.
More information: http://www.raecorents.com/acatalog/Rent-TSI-IAQ-Calc-7545.html