ELECALL’s Side Mount Stainless Steel Float Level Switches are highly reliable, compact, and durable solutions for precise liquid level detection and control. Designed specifically for side installation, these switches are ideal for tanks where top mounting is restricted due to space limitations, agitators, or structural constraints.
The series includes two main configurations:
- Single Ball (ESC series: ESC7810 to ESC120010)
- Double Ball (ESC-2 series: ESC20010-2 to ESC90010-2)
Both versions are constructed from high-quality 304 stainless steel (316/316L optional for enhanced corrosion resistance), making them suitable for water, oils, weak chemicals, and many industrial liquids. With a wide operating temperature range of -30°C to +120°C, laser seamless welding, and robust epoxy + rubber sealing, these switches deliver excellent performance in humid, high-temperature, and mildly corrosive environments.
Working Principle
These side-mount float level switches operate using a magnetic reed switch principle. A magnetic float ball (or two balls in the double-ball version) moves along a stainless steel stem as the liquid level changes. When the magnet inside the float aligns with the reed switch sealed inside the stem, the contacts open or close, providing a reliable ON/OFF signal.
- Single Ball Version: Features a 10mm control stroke for precise single-point level detection (high or low level). The float can be rotated 180° during installation to switch between Normally Open (NO) and Normally Closed (NC) operation.
- Double Ball Version: Incorporates two floats on the same stem, enabling dual switching points (upper and lower level control). This design provides a wider control differential, making it more suitable for pump start/stop automation, preventing frequent cycling, and offering more stable control in systems with larger level variations.
Both models use high-quality reed switches with low contact resistance (≤100mΩ) and long service life.
Key Technical Specifications
| Parameter | Single Ball | Double Ball |
|---|---|---|
| Material | 304 Stainless Steel (316 optional) | 304 Stainless Steel (316L optional) |
| Operating Temperature | -30°C ~ +120°C | -30°C ~ +120°C |
| Contact Rating | 10VA (1A1) / 50VA (2A1) | 10W (1A1) / 50W (2A1) |
| Max Switching Voltage | 100V / 220V AC/DC | 100V / 220V AC/DC |
| Max Switching Current | 0.5A (1A1) / 1.5A (2A1) | 0.5A (1A1) / 1.5A (2A1) |
| Control Stroke / Differential | ~10mm (single point) | Wider differential (dual points) |
| Installation | Side mount with elbow pipe | Side mount with elbow pipe |
| Sealing | Thickened rubber gasket + epoxy resin | Thickened rubber gasket + epoxy resin |
| Customization | Rod length, thread size, NO/NC | Rod length, float spacing, thread |
Structural Advantages
- Robust Construction: Laser seamless welding ensures high strength and leak-proof performance.
- Excellent Sealing: Thickened rubber gasket combined with epoxy resin provides strong waterproof and anti-oxidation protection, ideal for humid environments.
- Compact Design: Small footprint makes it perfect for limited installation spaces.
- Flexible Installation: The elbow pipe design allows convenient side mounting on tank walls. Thread sizes and rod lengths are highly customizable.
- Durability: 304/316 stainless steel offers superior corrosion resistance and long service life.
Typical Applications
These side-mount stainless steel float level switches are widely used in:
- Water tanks, reservoirs, and storage containers
- Water heaters, solar water systems, and boilers
- Drinking water dispensers, water purifiers, and coffee machines
- Humidifiers, air conditioners, and small refrigeration equipment
- Industrial automation, wastewater treatment, and chemical storage tanks
- Agricultural irrigation systems and pump control
- Automotive and mechanical equipment requiring reliable level monitoring
The Single Ball version is preferred for precise single-point detection in compact spaces, while the Double Ball version excels in applications requiring upper/lower level control, such as automatic water supply/drainage systems and pump protection.
Why Choose ELECALL
Since 2008, Yueqing ELECALL Electric Co., Ltd. has been a trusted professional manufacturer specializing in OEM/ODM production of industrial instrumentation, including level switches, sensors, transmitters, and controllers for liquid level, pressure, flow, and temperature measurement.
Backed by a 15,000㎡ ISO-certified factory, advanced production equipment, and a complete in-house testing laboratory, ELECALL ensures consistent quality and performance. Our products are CE and ROHS certified and have been successfully exported to over 30 countries across Europe, Southeast Asia, the Middle East, and the Americas.
We offer strong customization capabilities (rod length, thread size, material grade, float configuration, cable length, etc.), flexible MOQ, and competitive factory-direct pricing, making us an ideal partner for both small manufacturers and large system integrators.
Conclusion
ELECALL’s Side Mount Stainless Steel Float Level Switches (Single Ball and Double Ball) combine compact design, reliable reed switch technology, excellent corrosion resistance, and flexible installation to meet diverse liquid level control requirements. Whether you need precise single-point detection or stable dual-level control, these high-quality stainless steel solutions deliver long-term reliability and cost-effectiveness.
For technical drawings, samples, or custom configurations, please contact ELECALL — your professional partner in process measurement and control.
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