The Macromatic SFP240C250 is a pump seal failure relay. This 8 Pin plug-in relay has an input voltage of 240V. It is a dual channel relay designed to monitor for leaks in submersible pump seals and has two 5A SPNO outputs. The sensitivity is adjustable from 1K to 250K Ohms using the low profile adjustment knob. Dual channel indicates the relay is able to monitor two pumps. The SFP240C250 has LED indicators that are red when the unit senses a leak. If there is no leak, they stay green. It uses an 8 pin 70169-D octal socket. Note: Image is an approximation, actual part may differ

Specifications

Relay Function- Pump Seal Failure, Dual Channel
Input Voltage- 240V AC
Output- (2) 5A SPNO
Sensitivity Range- 1K to 250K 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- (2) 5A @ 240V AC / 5A @ 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)

Resistance is measured by a probe inserted in the pump seal cavity. In the event that a leak happens, contaminating fluid goes into the seal cavity, lowering the resistance between the probe and the common connection. The relay energizes when the resistance falls lower than the preset sensitivity point.

Macromatic SFP Series Relay Installation Instructions

SFP240C250 240V 1K - 250K Pump Seal Failure Relay