SFP Series Seal Leakage Relays are designed to monitor the shaft seals of submersible pumps for leakage. LED status indication and low-profile sensitivity knob are on top for easy setup and troubleshooting. These products utilize a plug-in enclosure for panel or DIN-rail mounting with a socket.

Three output configurations are offered: an 8 pin SPDT single channel relay and an 11 pin DPDT single channel relay to monitor a single pump, and an 8 pin dual channel relay (with 2 SPNO contacts) to monitor two pumps. Probes are pulsed with a DC voltage to prevent electroplating issues.

Operation:
Two wires from the relay are connected to a resistance-sensing probe in the pump seal cavity and the grounded motor housing or across two probes to monitor for seal leakage using a low-voltage DC signal. If the seal starts to leak, contaminating fluid enters the seal cavity. This lowers the resistance between the internal probe and the common connection.

When the resistance drops below the user-adjustable sensitivity set-point of the relay, the output relay energizes and the LED turns Red ON. The relay output can be used to give an alarm indication of a leaking seal.

 

Features

• Monitors Submersible Pump Seals for Leakage
• Works with Pumps using Resistance Sensing Leakage Detection
• Single or Dual Channel for Monitoring 1 or 2 Pumps
• Two Adjustable Sensitivity Ranges
• Full Status Indication on Top of Unit for Easy Troubleshooting
• Low-Profile Adjustment Knob
• Uses Industry-Standard 8 & 11 Pin Octal Sockets

 

Downloads

Document	File Type	File Size	Download
SFP Series Datasheet	PDF	535 KB