This monitoring relay from the WatchDog series offers even more functions in a new housing. Both the external and internal design are innovative, user-friendly, compact and compliant with international standards. The narrow 22.5 mm unit is quick and easy to install, has convenient terminals, a wealth of controls and indicators, and a consistent relay position philosophy (the relay is active if everything is correct) and presentation. The relays are powered by the optional power modules (AC 24 - 400 V) or by the monitored voltage. These functions ensure a perfect fit with the application and facilitate commissioning. 2 functions: filling or emptying. Switching threshold for adjustable sensitivity (0.25 - 100 kâ¦). Pick up and drop off delay separately adjustable.