The Macromatic SFP120A100 is a pump seal failure relay. This 8 Pin plug-in relay has an input voltage of 120V. This single channel relay is made to monitor for leaks in submersible pump seals and has an output of 10A SPDT. The sensitivity is adjustable and can be preset to meet the resistance level needed. The single channel feature means that the relay detects leaks for a single pump. The SFP120A100 features an LED that is red when the unit energizes and senses a leak. It stays green if there is no leak once the input voltage is introduced. It uses an 8 pin 70169-D octal socket.

Specifications

Relay Function- Pump Seal Failure, Single Channel
Input Voltage- 120V AC
Output- 10A SPDT
Sensitivity Range- 4.7K to 100KOhm
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- 10A @ 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 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.

Macromatic SFP Series Relay Installation Instructions

Pump Seal Failure Relay