The differential pressure transmitter is a transmitter Precont® HE5409 for small and medium pressures. Due to the layout with different pressure sensors measuring ranges between 0 and 2,5 mbar, 0 and 5 mbar, 0 and 10 mbar, 0 and 25 can mbar, 0 to 50 mbar and performed 0 to 100 mbar. Two connecting cables are used for power supply. The supply current is the measurement signal of 4 … 20 mA. The state is indicated by an LED.