The Macromatic SFF120C250 is a seal leak relay. This 8 Pin plug-in relay has an input voltage of 120V. It is a deadfront, inner door mounted, dual channel relay made to monitor for leaks in submersible pump seals and has two 5A SPNO outputs. The sensitivity is adjustable and LEDs on the top show the current status. The dual channel feature means that the relay can detect leaks for two pumps. Includes 8 pin OR08-PC back mounted socket. Note: Image is for reference, actual part may differ.
Specifications
The resistance is measured by a probe that is inserted in the pump seal cavity. In the event of a leak, resistance between the probe and the connection is lowered by contaminating fluid that goes into the seal cavity. The relay energizes when the resistance goes below the preset sensitivity point and the LED is red. Otherwise, the LED is green as long as the input voltage is present.
Macromatic SFF Series Relay Installation Instructions