Lascar el usb 2 lcd data logger lascar el usb 2 lcd cal th this standalone data logger measures and stores up to 16 379 relative humidity and 16 379 temperature readings over 0 to 100rh and 35c to 80c 31f to 176f measurement ranges the user can easily set up the logger and view downloaded data by plugging the data logger into a pc39s usb port and using the supplied software relative humidity temperature and dew point the temperature at which water vapour present in the air