Liquid Level Control Relays

Single-Probe Plug-in

Single Probe Pump Up or Pump Down

Single Probe Pump Up or Pump Down

Features
  • Controls Level of Conductive Liquids in Pump Up (Fill) or Pump Down (Drain) Applications
  • Probe is Pulsed with DC Voltage to Prevent Electrolysis
  • Factory-Fixed Time Delay Prevents Rapid Cycling
  • Two Adjustable Sensitivity Ranges
  • Input Voltages of 24, 120 & 240VAC
  • LED Status Indication
Enclosure Style Plug-in case utilizing industry-standard 8 pin octal sockets
Configuration/
Contact Rating
  • SPDT
  • 10A @ 240V AC/7A @ 28V DC, 1/4HP @ 120V AC (N.O.)
Approvals Liquid Level ControlLiquid Level ControlUL File #E109466
Technical Documentation

Operation:

Pump Up (Fill): When the liquid level falls below the probe, a fixed time delay begins and the LED flashes Red.  This time delay prevents rapid cycling of the output relay and its load.  At the end of the time delay, the output relay energizes and the LED is Red ON. The pump is ON to fill the tank. The relay remains energized until the liquid level rises and touches the probe. The output relay de-energizes, turning off the pump, and remains de-energized and the LED is Green ON until the liquid level falls below the probe. 

Pump Down (Drain): When the liquid level rises and touches the probe, a fixed time delay begins and the LED fl ashes Red.  This time delay prevents rapid cycling of the output relay and its load.  At the end of the time delay, the output relay energizes and the LED is Red ON. The pump is ON to drain the tank. The relay remains energized until the liquid level falls below the probe level. The output relay de-energizes, turning off the pump, and remains de-energized and the LED is Green ON until the liquid level rises and touches the probe.

If the container is non-conductive or insulated, an additional probe must be installed as the COM connection where it will always be submerged.

 

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Single Probe Pump Up or Pump Down

Single Probe Pump Up or Pump Down

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