Apex Flow sensor 1/2″suitable for pipe diameters of 20 mm measures the water flow in combination with the Apex system
This flow sensor is placed in the pipe for which you want to measure the flow speed. Connect the sensor to the FMM (not included).
The flow sensor itself uses British Standard Parallel Pipe (BSPP) thread. With a 20mm x 1/2″ PVC wire sock you can place the sensor in a 20mm pipe. (Wire socks are not included)
The FS-50 (1/2″sensor) can measure flow rates of 110-950 liters per hour