In modern liquid level monitoring and automation systems, adjustable stainless steel float switches are widely favored for their reliability, corrosion resistance, and installation flexibility. ELECALL offers two popular configurations in this category: the Single Ball Adjustable Stainless Steel Float Switch and the Double Ball Adjustable Stainless Steel Float Switch. Both are designed for vertical installation with the unique advantage of adjustable control points, making them highly versatile for various tank sizes and application requirements.
Product Overview
ELECALL’s adjustable stainless steel float level switches use high-quality 304 or 316 stainless steel for the stem, mounting, and float components. They operate on the proven magnetic reed switch principle, providing stable and accurate point-level detection without requiring external power for the sensing element.
- Single Ball Adjustable Version (Models: ES10010 ~ ES100010) Features one magnetic float ball with an adjustable clamp or stopper on the stem. This allows users to freely adjust the switching position according to the desired liquid level.
- Double Ball Adjustable Version Equipped with two magnetic float balls on the same stainless steel stem. Both floats can be independently adjusted, enabling two separate switching points (typically high level and low level) on one device.
Both models support operating temperatures from -30°C to +120°C, making them suitable for a wide range of hot and cold liquid applications. They come with high-temperature resistant silicone waterproof cables and threaded mounting for easy installation.
Key Technical Specifications
| Parameter | Single Ball Adjustable | Double Ball Adjustable |
|---|---|---|
| Material | 304 / 316 Stainless Steel | 304 / 316 Stainless Steel |
| Float Ball | Single SU304 Stainless Steel Ball | Two SU304 Stainless Steel Balls |
| Operating Temperature | -30°C ~ +120°C | -30°C ~ +120°C |
| Contact Rating | 10VA (1A1) / 50VA (2A1) | 10VA (1A1) / 50VA (2A1) |
| Max Switching Voltage | 100V / 220V AC/DC | 100V / 220V AC/DC |
| Max Switching Current | 0.5A / 1.5A | 0.5A / 1.5A |
| Contact Resistance | ≤100mΩ | ≤100mΩ |
| Cable | High-temperature silicone waterproof | High-temperature silicone waterproof |
| Installation | Vertical with threaded connection | Vertical with threaded connection |
| Adjustment | Single point (adjustable) | Dual points (both floats independently adjustable) |
Note: These switches are signal-level devices. For controlling high-power pumps or valves, an intermediate relay is strongly recommended.
Detailed Comparison: Single Ball vs Double Ball
1. Control Points & Functionality
- Single Ball: Provides one switching point. It is ideal when you only need to monitor or control either a high level (alarm/overflow) or a low level (dry-run protection). The position of the float can be easily adjusted by moving the clamp or stopper along the stem.
- Double Ball: Provides two independent switching points. One float can be set for low level (e.g., to start a pump or trigger an alarm), while the other is set for high level (e.g., to stop the pump or prevent overflow). This creates a wider control hysteresis and more stable system operation.
2. Application Flexibility The Single Ball version is simpler, more compact, and lower in cost, making it perfect for basic level detection. The Double Ball version offers significantly greater functionality for automatic control systems, as it can manage both filling and emptying cycles with one device.
3. Installation & Adjustment Both models feature threaded mounting and adjustable floats. However, the Double Ball requires more careful positioning of the two floats to achieve the desired differential between high and low levels.
4. Control Stability Double Ball switches reduce frequent on/off cycling of pumps, which helps extend pump lifespan and improve energy efficiency compared to using two separate single-ball switches.
Typical Application Scenarios
Single Ball Adjustable Stainless Steel Float Switch is best suited for:
- Simple high-level or low-level alarm
- Water purifiers, drinking water dispensers, and coffee machines
- Solar water systems and water heaters
- Humidifiers, air conditioners, and small refrigeration equipment
- Breeding ponds, drainage pools, and garden irrigation systems
- Medical equipment and laboratory liquid monitoring
Double Ball Adjustable Stainless Steel Float Switch excels in more complex automation scenarios, such as:
- Automatic water supply and drainage systems (pump start/stop control)
- Household or industrial water towers requiring both upper and lower level protection
- Wastewater treatment and sewage lifting stations
- Cooling towers and circulation systems
- Agricultural irrigation systems with automatic water replenishment
- Industrial storage tanks needing dual-level control to prevent overflow and dry running
Both versions are widely used in environments involving water, weak acids/alkalis, oils, and other mildly corrosive liquids thanks to the excellent corrosion resistance of 304/316 stainless steel.
Why Choose ELECALL Adjustable Float Switches
Since 2008, Yueqing ELECALL Electric Co., Ltd. has specialized in the research, development, and OEM/ODM manufacturing of industrial instrumentation, including float level switches, sensors, and controllers for liquid level, pressure, flow, and temperature.
Our 15,000㎡ ISO-certified factory is equipped with advanced production lines and a professional in-house testing laboratory, ensuring consistent high quality. All products comply with CE and ROHS standards and are exported to more than 30 countries worldwide.
ELECALL’s adjustable stainless steel float switches stand out with their flexible adjustment design, robust construction, reliable reed switch performance, and competitive factory pricing. We also offer strong customization capabilities, including stem length, material grade (304/316L), cable length, and thread specifications.
Conclusion
ELECALL’s Single Ball Adjustable and Double Ball Adjustable Stainless Steel Float Level Switches provide flexible, reliable, and cost-effective solutions for precise liquid level control.
- Choose the Single Ball version for simple, economical single-point detection.
- Choose the Double Ball version for advanced dual-level automatic control with better system stability.
Whether for household appliances, water treatment, or industrial automation, these adjustable stainless steel float switches deliver long service life, easy installation, and excellent performance in demanding environments.
For technical drawings, samples, or custom configurations, feel free to contact ELECALL — your trusted partner in liquid level measurement and control.
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