Weber Sensors 4121.81MS141 flow-captor:

flow-captor type 4121.81MS141-flow unit with 6-pin Binder connector, separate connection cable 6 X 0.5mm (4923), 2 m length with Binder 6-pin female connector, supply voltage 90 to 170 VAC, Relay output-single pole double throw contact, Relay contact l…