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Waterline Controls

Water Level Controls & Sensors

WLC4500 – Fill with Low Alarm

WLC4500 – Fill with Low Alarm

Complete Kit Includes:

  • Sensor With 50 ft. Sensor Wire*
  • Controller
  • Mounting Assembly


  • Fill w/ Low Alarm
  • 2-Contact point system
  • 6-wire Dry contacts to BMS for measuring:
    • Fill “ON” time
    • Low Water Alarm
    • Fault conditions
  • Operates any 110VAC valve & 110VAC audible alarm (Not supplied in this kit)


This fill only and low alarm Controller is a highly reliable tool to perform the task of turing off a pump whenever the water is not recovering fast enough. Simple, dependable, and will outlast much of the rest of the system.


The system monitors for a low water level condition and has 3 outputs which will:

  1. Close a set of dry contacts for a BMS
  2. Operate a relay rated at 30AMPS for 250VAC
  3. Turn on an LED to indicate this sensor has tripped.

The Control Panel has visual displays indicating power to the level control panel, when the control panel is actively filling and the low water alarms. The Fill dry contacts can be used as a comparative to develop a baseline benchmark of water usage for the system.

*Custom Sensors lengths available upon request.

If you are a Reseller, Sales Organization, Distributor, Contractor or an OEM we want to talk with you to determine an SPA price program for your organization so please call us at 1(888) 905-1892 or contact us now.