Aquacomputer G1/4" Flow Rate Sensor, MPS Flow 200 Flow sensor compatible with Aquacomputer Aquaero 5 MPS flow 200: Measuring range approx. 40 - 200 liters per hour G1/4" Ports Includes USB and aquabus interface Dimensions without fittings and connection cable: Approx. 55 x 34 x 21mm