The dry-running sensor may only be used with garden irrigation systems and pond pumps or similar. It must not be used in liquid food handling installations (drinking water or drinks).

Note:

Pumps designed for pumping liquids cannot prime air for a prolonged period: the pumped liquid provides – similar to the oil in an automobile engine – lubrication and cooling. If the liquid is absent the pump can be damaged. 

The Hydrostop dry-running sensor prevents a pump priming air. It is installed in the pump’s discharge line. As long as there is water in the line, the water pressure is sensed by a pressure-sensing switch, closing the circuit supplying the power to the pump, and the pump runs. If no liquid is pumped, the spring- actuated pressure-sensing switch opens the supply circuit, and the pump stops. 

Operating controls

1.Plug

2.Tee fitting, threaded

3.Sensor enclosure

4.Female connector

5.Push-button

Hydrostop

2.2