Welcome: HC Electric

Float Switch

  • Float Switch HC-M15-4
  • Float Switch HC-M15-4
Float Switch HC-M15-4Float Switch HC-M15-4

Float Switch HC-M15-4

  • Model Type: HC-M15-4
  • Nominal Voltage: 250V-380V
  • Rated Current: 15(8)A 10(4)A
  • Temperature:From 0℃ to 80℃
  • Product description: Float Switch

Model Type


Nominal Voltage


Rated Current

15(8)A 10(4)A



Mechanical Life

≥300,000 Times

Electrical Life

≥100,000 Times

Protection Level


Current Switch

≥50 000(VD Special Standard)

Biggest Working Pressure

1 Pa

Protection Connection


Limit Breaking Capacity

250V 1KW Direct Current

What is Float Switch?

A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices.

One type of float switch uses a mercury switch inside a hinged float. Another common type is a float that raises a rod to actuates a microswitch. One pattern uses a reed switch mounted in a tube; a float, containing a magnet, surrounds the tube and is guided by it. When the float raises the magnet to the reed switch, it closes. Several reeds can be mounted in the tube for different level indications by one assembly.

A very common application is in sump pumps and condensate pumps where the switch detects the rising level of liquid in the sump or tank and energizes an electrical pump which then pumps liquid out until the level of the liquid has been substantially reduced, at which point the pump is switched off again. Float switches are often adjustable and can include substantial hysteresis. That is, the switch's "turn on" point may be much higher than the "shut off" point. This minimizes the on-off cycling of the associated pump


The HC Electric float switch is the world’s most versatile float switch. Unlike the other products on the market, the HC Electric float switch comes with a four-point level switch. The HC Electric float switch not only serves as an alarm system for a pre-determined liquid level but can also be used to control the filling and emptying of a tank. You can set the threshold values yourself easily, with no need for any additional devices. The HC Electric switch is available in several models, covering a wide variety of purposes and applications. We are also delighted to customise a float switch to meet your specific needs.

Reliable operation in all conditions

Thanks to its conical shape and low weight in relation to its size, the HC Electric float switch offers excellent buoyancy and problem-free operation in all conditions. In addition to wells, pumping solutions, and tanks, it is well suited to monitoring and controlling the level of wastewater, liquids generated in industrial processes, and liquids that cover a wide viscosity range. The large float casing houses several microswitches that control the various float-switch functions in accordance with the angle of the float. As the liquid level rises and falls, the microswitches open and close contacts to adjust the signal current.

Easy-to-adjust switch activation levels

The HC Electric float switch’s stop, start, and level-alarm functions are easy to control by adjusting the length of the cable and changing the position of the weight.

A wide range of standard models, plus bespoke solutions

We offer you more than 30 standard HC Electric float-switch models to choose from, with anywhere from one switch function to four: low and high level alarms and control functions for stopping and starting. We can also design a customised float switch to meet your specific needs, such as a greater switching differential or a higher maximum operation temperature than offered by our standard models.

Cables delivered on the basis of dimensions, application, and liquid

Instead of being standard solutions, the cables for HC Electric float switches are always delivered to match the liquid and the tank dimensions. This ensures a problem-free, long service life for the float switch, even when used with corrosive liquids. Using our databank, we can select the optimal cable type for each application.

1. PVC-coated cable for normal use

2. Rubber cable for low temperatures and applications causing mechanical strain

3. Thermoplastic polyurethane (TPU) cable for applications in which resistance to oil is required

4. Teflon (PTFE) cable for demanding chemical applications

5. Special cables, including halogen-free, silicone, and PUR cables

Why choose the HC Electric float switch?

1. A simple structure and reliable operation

2. Cost-efficiency

3. Several level switches in a single float

4. Easy-to-adjust switch operation levels

5. Suitability for demanding applications and the majority of liquids

6. A wide range of standard products, plus bespoke  solutions

7. Various cable options, available for a wide variety of applications and liquids

8. Cable lengths tailored to meet the client’s specific needs

9. Easy installation

10. An environmentally friendly solution without mercury or lead

11. Safe use also with hazardous liquids

12. No need for maintenance

13. A longer pump service life, as the pump is not switched on and off unnecessarily

14. A full operation test for all switches

15. Top-quality products created through experience spanning five decades