Level monitoring relay EMR4-N [t-head2]

The level monitoring relay EMR4-N is used mostly as dry running protection for pumps or for level regulation of liquids. It operates with sensors that measure conductivity. A sensor is required for the maximum and also a sensor for the minimum level. A third sensor is used for earth potential.

The 22.5 mm wide device EMR4-N100 is suitable for conductive liquids. It can be switched from level regulation to dry running protection. The safety is increased as in both cases the motor current principle is used.

The level monitoring relay EMR4-N500 has an increased sensitivity and is suitable for less conductive liquids. Due to an integrated rise and fall delay of between 0.1 and 10 s moving liquids can also be monitored.