Pump Options And Variants; Diaphragm Leakage Sensor - Grundfos DMX 221 Installations- Und Bedienungsanleitung

11. Pump options and variants

11.1 Diaphragm leakage sensor

Pumps prepared for diaphragm leakage sensor have a special dosing head flange with an optical
sensor. The sensor contains an infrared transmitter and an infrared receiver.
In case of a diaphragm leakage, dosing medium will seep out into the dosing head flange and the
light refraction in the optical sensor will change. The sensor produces a signal that can trigger an
alarm device or switch off the pump via one of the following devices:
•
•
Diaphragm leakage sensor with AR control unit
AR control unit
electronic unit for optical sensor.
Observe the installation and operating instructions for the AR control unit.
DMX 221 | | 50