The Macromatic SFP120B100 is a pump seal failure relay. This 11 Pin plug-in relay has an input voltage of 120V. It is a single channel relay designed to monitor for leaks in submersible pump seals and has an output of 7A DPDT. The sensitivity is adjustable from 4.7K to 100K Ohms using the low profile adjustment knob. Single channel indicates that the relay detects leaks for one pump only. The SFP120B100 has an LED that glows red when the unit senses a leak. If there is no leak, it stays green. It uses an 11 pin 70170-D octal socket. Note: Image is an approximation, actual part may differ

Specifications

Relay Function- Pump Seal Failure, Single Channel
Input Voltage- 120V AC
Output- 7A DPDT
Sensitivity Range- 4.7K to 100K Ohm
Voltage Tolerance- +10/-15% of nominal
Load- 3VA
Probe Voltage- 5V DC Pulsed
Operating Temperature- -28 C to 65 C (-18 F to 149 F)
Storage Temperature- -40 C to 85 C (-40 F to 185 F)
Output Contacts- 7A @ 240V AC / 7A @ 28V DC, 1/4 HP @ 120V AC (N.O.)
Life- Mechanical: 10,000,000 Operations, Full Load: 100,000 Operations
Response Time- Pick up: 1 sec, Drop out: 1 sec
Dimensions- 2.4" Height x 1.7" Width x 3" Depth
Approvals- UL and CUL Recognized, CE, UL & CUL Listed (with Socket)

The resistance is measured by a probe inserted in the pump seal cavity. In case of a leak, resistance between the probe and the connection is lowered, caused by contaminating fluid going into the seal cavity. The relay energizes when the resistance drops below the preset sensitivity point.

Macromatic SFP Series Relay Installation Instructions

Macromatic SFP120B100 11 Pin Plug In Relay