This positive displacement flow sensor switch with display is designed for use in slighly viscous fluid like glue, honey or oil and specially to switch a valve and to establish a monitoring system or an OnOff control loop. The switching points can be programmed with the 3-key keypad under the display or optionally from an external source over a 4-20 mA loop. The 8072 is proposed with OnOff output, or with external setpoints andorprocess value outputs.