Capable of working at a rather frigid -40 and all the way up to a nice and toasty 185°F, the Extech 42270 allows you to accurately record temperatures and humidity in environments that may not be fit for humans to work in. 42270: Temperature/Humidity Datalogger Temperature/Humidity Datalogger for 42275 kit and the 42276 Programmer/Printer Features: Wide operating temperature range: -40 to 185°F (-40 to 85°C) Humidity range: 0 to 100% RH Records up to 16,000 readings (8,000 readings for each parameter) Use in storage containers, shipping vans, freezers and more Logs data for days, weeks or months - up to 1 year battery life Programmable sampling rate from 1sec to 2hrs plus Hi/Lo limits with alarm indication LCD displays current temperature/humidity Requires 42275 docking station for programming and data download Specifications: 42270 Extech Infrared thermometer IR Thermometer ÍÔ¹¿Òàôà·ÍÃìâÁÁÔàµÍÃì à¤Ã×èͧÇÑ´ÍسËÀÙÁÔẺÍÔ¹¿Òàô