Level Diaphragm Pressure Switch

In metering technology, liquids must be stored, conveyed, refilled, mixed and metered in many different ways The filling level must be monitored and controlled in order to determine the exact quantity to prevent overflowing, to refill an empty tank or to protect the
pump from dry running.

A number of different systems have been developed to enable the optimum solution to be selected for all
possible operating cases and liquid properties. The essential criteria for a suitable system include, among other things, the conductivity of the liquid and adhesive or crystallizing properties.

The decision
may also be influenced by the control supply voltage available. For instance, small pumps can be
controlled in single-phase operation, or the main contactor of larger a.c. motors can be controlled
directly by means of a float switch, without a separate relay interface.

In addition to the designs discussed here, a large range of level probes, operating according to the
conductivity principle, with the float switch described on data sheet MB 1 22 01, is available.

The range
also includes easy-to-install combinations with the suction tube and foot valve and an integrated level
monitoring system. Special designs for solenoid metering pumps are also described on the same
sheet.