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Stainless steel side-mount liquid level switch with 1/2 inch NPT fitting and float

Madison

Madison M3827-2NO SPST Tank Liquid Level Switch

SKU CH-FM22-B4HBJ

Side-mount liquid level switch closes on rise with 316 stainless steel float and stem rated for 240 VAC and 50 psi

  • TypeLight Switch
  • Close-on-rise SPST contact simplifies tank-level control
  • 240 VAC, 0.28 A rating handles standard industrial circuits
  • 316 stainless steel float and stem resist corrosion in harsh fluids
  • 50 psi pressure limit suits pressurised tank installations
  • 392 °F max temperature extends service in high-heat applications

Tank Liquid Level Switch

The Madison M3827-2NO is a side-mounted SPST switch designed to close on liquid rise for tank level monitoring. It suits industrial or commercial systems requiring 316 stainless steel construction and a 1/2 inch NPT tank connection for direct installation.

Build and Mounting

The body, stem and float are all 316 stainless steel, with the stem measuring 3.8 inches and the float 1.54 inches in diameter by 1 inch long. A 1/2 inch conduit fitting protects wiring, while the side-mount design allows horizontal tank penetration without top access.

Electrical Limits

Rated for 240 VAC maximum and 0.28 A maximum current, the switch carries a 30 VA rating suitable for pilot-duty control circuits. Operating temperature reaches 392 degrees Fahrenheit and pressure is limited to 50 psi, restricting use to compatible fluid and environmental conditions.

Highlights

  • Close-on-rise SPST contact simplifies tank-level control
  • 240 VAC, 0.28 A rating handles standard industrial circuits
  • 316 stainless steel float and stem resist corrosion in harsh fluids
  • 50 psi pressure limit suits pressurised tank installations
  • 392 °F max temperature extends service in high-heat applications

Specifications

BrandMadison
TypeLight Switch

Questions about this item

How much voltage and current can the SPST contact handle?

The SPST contact is rated for a maximum of 240 VAC and 0.28 A, with a 30 VA rating that caps the switching capacity in practice.

What tank opening and stem length are required for side mounting?

It needs a 1/2 in NPT tank connection for side mounting, and the 316 stainless steel stem extends 3.8 in into the tank.

How do I wire the conduit entry without damaging the float?

Connect the 1/2 in conduit to the switch housing first, then lower the assembly so the 1.54 in diameter float clears the tank wall before tightening the NPT fitting.

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