The Dry-Running Safety DS-01 is an electo-mechanical appliance which automatically switches off the electric pump when there is no liquid to pump,thus it protects the pump from damage caused by dry-running operation.It can be used in conjunction with all kinds of garden jet pumps,pressure booster system,and submersible pumps,which have been designed for private use around your house and grass-field.These pumps are predominantly used for operating watering equipment and systems in garden.