Lascar usb data logger temperature humidity and dew point lascar el usb 2 the lascar el usb 2 data logger can record up to 16 382 relative humidity and 16 382 temperature readings over the range of 0 to 100 rh and between 35degc to 80degc using the included purpose designed software the collected data can be easily downloaded via usb and then analysed via graphs printed or exported the data logger may also be set up via the software which will allow the user to set the logger n