Low Water Cut Out / Level Alarm Sensor

M-Tech’s Basin Heater Float Switch is an economical level switch available in polypropylene wetted materials allowing for wide compatibility with many aggressive liquids.

Our cooling tower float switches are distinguished by its repeatable response, compact size, and high capacity reed switch and is designed for installation into the sidewalls of tanks. The plastic float, containing a magnet, moves as the liquid level rises above or falls below the switch point. When the magnet moves close to the reed contact, the switch closes, completing the circuit.

The switch function may be changed from normally open to normally closed by merely rotating it 180°. A simple and functional design makes it virtually maintenance-free.


Key Benefits

  • Lowers costs—significantly less expensive than steel, or stainless-steel float switches.
  • Compact size —one of smallest footprints on the


Key Features

  • Water-tight NEMA 4X polycarbonate enclosure—ideal for use in wash down or rugged industrial applications. Covers additional enclosure types, such as NEMA 1, 12, 3R, and
  • Available in 24VDC. 24VAC and 120VAC
  • Normally open, or Normally closed contact depending on orientation.
  • cULus certified—UL File E164864

Float switch specifications:


Float: Polypropylene

Housing:                    Polypropylene

Connection Fitting:          1" NPT

Orientation:                    Horizontal ± 30°

Max. Temperature Polypropylene:            176 °F

Max. Pressure:                145 PSIG

Min. Liquid Density Polypropylene:          0.6 S.G.

Reed Switch

Max. Voltage:             230 VAC/VDC

Max. Current:             2 A

Max. Power:               40 VA

Relay electrical specifications:

UL / CUL Ratings

Load Type


2 Form C (DPDT)


General Purpose

277 VAC

250 VAC

28 VDC

10 A

12 A

12 A


125 VAC

250 VAC

1/2 HP

1/2 HP

Max. Switching Power

3,000 VA

336 W




AgCdO (Silver Cadmium Oxide)

Initial Contact Resistance

50 milliohms max @ 0.1 A, 6 VDC


Service Life


1 X 107 Operations


1 X 105 Operations



Operate Time

25 ms Max

Release Time

25 ms Max

Insulation Resistance

1,000 MΩ min (at 500 VDC)

Shock Resistance

100 m/s2 11 ms,

Power Consumption

1 & 2 Pole DC 0.9 W, AC 1.2 VA



Vibration Resistance

10 Hz - 55 Hz DA 1.5 mm

Terminal Strength

8N; 4N PC Type


260ºC for 5 seconds

Operating Temperature

-40 to 70 ºC

Relative Humidity

85% (at 30°C)


37 grams

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