... need to drill one hole, easy and efficient;4). Multi signal outputRS232, RS485, Voltage (0 ~ 5V), Current (4 ~ 20mA), ... GP6000, GP6000F1.GP4000 support fuel level sensor with analog signal output.2. GP6000 works with digital fuel level sensor (RS232,RS485), 3 ... station, oil storage, fuel tank, steamer fuel consumption, generator of petroleum drilling or construction machineries, ect… Each fuel sensor ...