Pressure switches HD 505 are intended to regulate the levels of water in the washing machines, dishwashers and other electrical appliances. Operation is based on pressure variation as a result of different water level. Pressure variation is actuating the switching mechanism through the rubber membrane. It is designed so that allows the regulation of very low levels being a small component. Different versions regulate one or two levels with the possibility of spill over and heater protection.

Basic technical characteristics of pressure switches are:

 -          operating: through air connecting tube diameter 5.5 mm
 -          mounting: with self-tapping screw 3,5 x 9,5 mm or with
            adapter for quick mounting on the cover of pressure
            switch
 -          connectors: 6,3 x 0,8 mm, R5, R2,5
 -          switch capacity and minimal life endurance of switch:
                           *  set contact 10(4)A / 250V~ ;
                               30 000 cycles
                           *  reset contact 16(4)A / 250V~ ;
                               30 000 cycles
                           *  spill over contact 1(2)A / 250V~ ;
                               10 000 cycles
 -          distance between contacts: less than 3 mm
 -          operating temperature: T 85
 -          levels: factory adjusted between 40 and 350 mm H2O
 -          standard tolerances: + - 7,5 mm H2O; spill over level
            + - 30 mm H2O

Other possibilities of pressure switch versions:

 -          pressure switches according to the number of levels:
            single level, double level
 -          possibility of additional spill over protection
 -          position of the air connector: by customer requirement
 -          type of electrical connection:
                          *   double level pressure switches have
                               individual connectors
                          *   single level pressure switch have individual
                               connectors or connector R5 and R 2,5

Pressure switches are VDE and UL approved.