Special Features | Calculates Time-Weighted Average (Twa) And Short-Term Exposure Limit (Stel), Data Hold, Max/Min And Average Functions, Low Battery Indicator And Auto Shut-Off, Low-Drift Ndir Co2 Sensor For Stable And Accurate Readings, Record Up To 32,000 Data Points And Keep Track With Internal Time And Date Stamp, Temperature And Relative Humidity Measurements Help Determine Thermal Comfort, Triple Lcd Display Simultaneously Monitors Carbon Dioxide (Co2), Temperature And Relative Humidity, User Adjustable Audible Alarm, User Selectable Sampling Rate From 1 To 60 Mins |