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Extech Digital Thermometer

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Checks for carbon dioxide (CO2) concentrations
Calculates statistical weighted averages of TWA (8-hour time weighted average) and STEL (15-minute short term exposure limit)
Maintenance-free NDIR (non-dispersive infrared) CO2 sensor

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Portable indoor air quality CO2 meter measures carbon dioxide (C02), temperature, humidity, dew point, and wet bulb. Checks for carbon dioxide (CO2) concentrations and calculates statistical weighted averages of TWA (8 hour time weighted average) and STEL (15 minute short term exposure limit). User programmable audible alarm. Data acquisition software and cable included to record and document CO2, humidity and temperature data.

Checks for carbon dioxide (CO2) concentrations
Calculates statistical weighted averages of TWA (8-hour time weighted average) and STEL (15-minute short term exposure limit)
Maintenance-free NDIR (non-dispersive infrared) CO2 sensor
Humidity from 0.1 to 99.9% RH
CO2 from 0 to 5,000-PPM
Temperature from 14° to 140°F (-10° to 60°C)
User programmable audible alarm
Complete with software and cable, 4 AA batteries, and carrying case