Extech CO250: Portable Indoor Air Quality CO2 Meter
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
Measurement ranges:
CO2: 0 to 5, 000ppm
Temperature: -14