It includes a robust and accurate embedded differential pressure sensor, which can survive a pressure of up to 18 bars. Optionally an external mechanical DP sensor can be used.

The backflush process can be triggered by time, by DP or both. Programming is done easily with the Bluebits smartphone App. The App communicates with the controller using the embedded BLE (Bluetooth low energy) transmitter. This allows programing the FT1 & BT from up to 10 meters away. The standard power option for this controller is 4 X “C” type alkaline batteries (Which can be purchased anywhere).  It can also be powered by a 12V DC power supply or a small solar panel and a small rechargeable battery.

The controller has an external manual backflush button, to quickly start / stop a backflush process without even opening the box. If there is a problem of continuous backflush cycles, the controller will detect it and switch to backflush by time only. The controller also alerts in case of a low battery situation. The output can operate a 12V DC latch solenoid.