EFQS-HM180 High Temperature Cable Float Switch(Mercury Switch Type)
Mercury switch type (no mechanical wear)
High temperature resistance up to 180°C
Stainless steel float and housing
Silicone cable (heat resistant)
Suitable for harsh environments
Switching angle ±10° for more sensitivity
Long service life
Application
- High-temperature water tanks
- Boilers and heating systems
- Industrial liquid control systems
- Oil and chemical tanks
- Sewage and wastewater systems
- Water supply and drainage systems
Description
The EFQS-HM180 automatic float level switch is a high-temperature resistant liquid level controller designed for reliable operation in demanding environments. Compared to the standard micro switch version, this model adopts a mercury switch, allowing it to withstand temperatures up to 180°C while maintaining excellent stability and accuracy.
The device features a 304 stainless steel housing combined with a high-temperature resistant silicone cable, ensuring durability under extreme heat, humidity, and corrosive conditions. The built-in mercury contact provides precise and reliable switching without mechanical wear, making it ideal for long-term continuous operation.
Widely used in tanks, wells, and industrial systems, the EFQS-HM180 is suitable for water, oil, and weak chemical liquids, especially in high-temperature applications such as boilers and heating systems.
Features
- 304 stainless steel housing:corrosion resistant,impact resistant, and durable
- High-temperature silicone cable:flexible, anti-aging, and chemical resistant
- mercury switch type (up to 180°C)
- Strong sealing structure with waterproof protection (IP68)
- Built-in high-quality copper wire: low resistance and reduced heat generation
- Compact size suitable for narrow installation spaces
- Stainless steel counterweight for stable positioning
Technical Details
Product Type:
Cable Float Switch
Product Model:
EFQS-HM180
Material:
304/316 Stainless Steel (housing & float), Silicone cable
Size:
See attached drawing
Float Switch Type:
Mercury Switch Type
Operating Temperature:
0°C to +180°C
Working Voltage:
0~24V
Control Range:
Liquid level difference >30cm
Contact Switch:
Mercury Switch
Float Ball Density:
0.69g/cm³
Lead Length:
2m / 3m / 4m / 5m / 10m (customizable)
Core Material:
Tin-plated Copper
Wire Diameter Specification:
0.75mm²
Installation Type:
Cable Suspended Type
Accessories
What makes EFQS-H different from a standard float switch?
EFQS-H uses a 304 stainless steel housing combined with a sealed industrial-grade structure, offering better durability and suitability for both household and industrial liquid level control compared to basic plastic float switches.
Can this float switch work in dirty or sewage water?
Yes. The sealed structure and corrosion-resistant materials allow stable operation in sewage, wastewater, and slightly contaminated liquids.
How is the switching signal generated?
The internal switch is mechanically triggered by the float movement. As the liquid level rises or falls, the float tilts and activates the internal contact to switch the circuit.
What role does the counterweight play?
The stainless steel counterweight helps stabilize the cable position and ensures the float operates at a fixed switching point for more accurate level control.
Is the cable suitable for outdoor or humid environments?
Yes. The silicone cable is flexible, anti-aging, and resistant to moisture and chemical exposure, making it suitable for harsh environments.
What installation conditions should be considered?
The switch should be installed vertically or with free swing space to ensure the float can move naturally without obstruction.
Can it control both filling and draining systems?
Yes. It can be used for both filling control and drainage control systems, depending on the wiring configuration.
What type of maintenance does it require?
It is a low-maintenance device. Regular inspection for cable condition and float movement is usually sufficient.
Is it suitable for small tanks or limited space installations?
Yes. Its compact structure allows installation in small tanks and narrow spaces where traditional level switches may not fit.
What is the expected service life in real use?
Thanks to the mercury switch design without mechanical wear, it offers longer service life and stable performance in high-temperature environments.
How to choose between micro switch and mercury switch?
The micro switch type is suitable for general applications, while the mercury switch type is ideal for high-temperature environments and more stable switching performance.
Is installation complicated?
No, the installation is simple. The float switch can be installed directly using the cable and counterweight for positioning.
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The EDPS series differential pressure switch is a special type of control switch. It is a kind of switch that controls closing or opening based on the pressure difference between mutual components and relies on electrical signals for information transmission.
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