The unit can read up to 8 analog voltages and 4 digital channels and store data to an SD card or output it to RS-485 port. 4 current sources are provided to bias sensors connected to the datalogger. Data can be time-stamped with internal battery-backed clock. The FAT formatted card can also be read from RS-485, (RS-232) or USB port. Configuration can be stored on the card or transferred through RS-485. Various supply options are available including internal rechargeable battery.