Time Mark Corp. Model 409-24VAC Liquid Level Controller for Conductive Liquids - SPDT, 20-30VAC


The Time Mark Model 409 is a compact, socket-mount device for level control of conductive liquids. The internal relay is energized when operating power is applied. When the liquid level reaches the probe, the relay de-energizes. When the level drops below the probe, the relay will reset.

A fixed, two-second time delay prevents oscillation due to wave action. Probe cables may be shielded or un-shielded. If the liquid container is made of a non-conductive material, a common electrode is required. Other features include an LED indicator to show the output relay status and an adjustable sensitivity setting. The Model 409 requires a standard 8-pin octal socket (sold separately).


  • 409-24VAC = 20-30VAC Operating Voltage
  • Automatic control of liquid level
  • Solid-state sensing circuit
  • Adjustable sensitivity
More Information
Features Liquid Level Controller
Manufacturer Time Mark Corporation
Power 120V AC
Type Liquid Level Controllers
Additional Skus 409-24, 409-24VAC, 40924, 40924VAC
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