CWT5016 Support GPS/GSM/GPRS, with 4 Temperature sensor, 4 Ad inputs, 4 Digitial inputs, 4 Digital Outputs, gps tracking system. CWT5016 gps tracking ... . It combines 4 digital inputs, 4 drivable relay outputs, 4 analog inputs and 4 special temperature sensor inputs with embedded GPS and GSM ... positionAlert on low water/oil tank level gps tracking system (with temperature sensor, I/O controll)