Flow Sensor Measurement range, with adapter: 0.4...4.0 L/min Measuring range: 2...20.0 L/min Operating temperature: 0...+100 °C Output frequency: 25...225 Hz Connection: G1/4" Electrical connection: Cable, 60 cm Housing Material: Brass (CuZn) Output: 0...4.5...24 VDC rectangular pulse, constant voltage, frequency dependent on flow rate Operating voltage: 4.5...24 VDC