Introduction
In demanding industrial and high-temperature environments, reliable liquid level control is essential. ELECALL’s EFQS-HM180 and EFQS-H high temperature cable float switches deliver robust, accurate performance for automatic water supply, drainage, and level monitoring.
These stainless steel cable float level switches feature durable 304/316 stainless steel construction, high-temperature resistant silicone cables, and IP68 waterproof sealing. They are ideal for boilers, hot water tanks, chemical storage, sewage systems, and other harsh conditions where ordinary plastic float switches would fail.
Whether you need the mercury switch type (EFQS-HM180) for superior high-temperature stability up to 180°C or the micro switch type (EFQS-H) for versatile general high-temperature applications, ELECALL provides professional-grade solutions.
Stainless steel high temperature cable float switch with silicone cable and counterweight – compact and durable design.
Working Principle
Both models operate on a simple yet reliable mechanical principle. As the liquid level rises or falls, the stainless steel float tilts at an angle of ±45°. This movement activates the internal switch — either a mercury switch (EFQS-HM180) or a high-sensitivity micro switch (EFQS-H) — to open or close the circuit, precisely controlling pumps, valves, or alarms.
The mercury switch version offers no mechanical wear and excellent stability in high-temperature conditions, while the micro switch version provides fast response and broad compatibility.
Key Features and Technical Specifications
- Material: 304/316 stainless steel housing and float for excellent corrosion resistance against water, oil, weak acids, alkalis, and sewage.
- High-Temperature Resistance:
- EFQS-HM180 (Mercury Switch): 0–180°C
- EFQS-H (Micro Switch): 0–100°C (with high-temperature cable support)
- Electrical Rating: ≤230V / 8A (resistive load)
- Cable: High-temperature resistant silicone cable (3x1mm²), flexible and anti-aging; lengths from 1m to 20m (customizable)
- Protection: IP68 waterproof and dustproof
- Control Range: >0.3m
- Working Pressure: <1MPa
- Service Life: ≥50,000 cycles
- Additional Advantages: Stainless steel counterweight for stable positioning, silver-plated contacts, low-resistance copper wiring, compact size for narrow spaces, and strong sealing.
EFQS series high temperature stainless steel float switch showing cable and float dimensions – suitable for tanks and boilers.
EFQS-HM180 vs EFQS-H: Which One to Choose?
- EFQS-HM180 (Mercury Switch Type): Best for extreme high-temperature applications (up to 180°C). The mercury switch ensures stable, wear-free operation in boilers, heating systems, and hot liquid environments. It excels in conditions with vibration or continuous high heat.
- EFQS-H (Micro Switch Type): Ideal for standard high-temperature water tanks, reservoirs, sewage treatment, and industrial drainage where temperatures reach up to 100°C+. It offers quick response and is widely used in water supply systems, pools, and aquariums.
Both models share the same robust stainless steel build and IP68 protection, making them highly reliable in humid, corrosive, or dirty liquids.
Wide Range of Applications
These high temperature cable float switches are widely used in:
- Boilers and heating systems
- High-temperature water tanks and hot water supply
- Industrial liquid level control (oil, weak chemicals)
- Sewage and wastewater treatment
- Water towers, reservoirs, and drainage systems
- Food processing, metallurgy, and petrochemical equipment
Their corrosion resistance and high sealing performance allow reliable operation even in polluted or aggressive liquids.
Why Stainless Steel Float Switches Excel in Harsh Settings — ACTSENSORS
Stainless steel float level switch designed for harsh and high-temperature industrial environments.
Why Choose ELECALL
Since 2008, Yueqing ELECALL Electric Co., Ltd. has specialized in OEM/ODM manufacturing of industrial instrumentation, including level switches, sensors, transmitters, and controllers for pressure, flow, temperature, and liquid level applications.
Backed by a 15,000㎡ ISO-certified factory, advanced production equipment, and a professional in-house testing laboratory, ELECALL ensures consistent high quality. All products meet CE, ROHS, ISO9001, and relevant explosion-proof standards. Our solutions are exported to over 30 countries across Europe, Southeast Asia, the Middle East, and the Americas.
We offer flexible MOQ (starting from 100 pieces), strong customization capabilities (cable length, material, wiring), and competitive pricing — serving small manufacturers to large system integrators worldwide.
Conclusion
The EFQS-HM180 and EFQS-H high temperature cable float switches from ELECALL provide a cost-effective, durable, and reliable solution for precise liquid level control in challenging environments. With stainless steel construction, IP68 protection, and excellent temperature resistance, they help reduce maintenance and improve system safety.
For reliable high temperature float level switches, trust ELECALL — your professional partner in process measurement and control.
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