The DT500 and DT600 range of general purpose data loggers are real-time, battery powered and able to measure inputs from most sensor types. 30 terminals enable connection of 30 single-ended or 10 differential channels (or 4-wire RTD's), along with 4 bi-directional digital channels and 3 counter channels. The data logger has an internal 6V 1.2Ahr battery that lasts between 10 hours and 3 months depending on set-up. The DT 500/600 data logger can transmit collected data directly via RS232 or the SMX/ GSM modem