How Reliable is a Magnetic Float Ball Level Switch for Liquid Level Control

When precision and durability are non-negotiable in liquid level monitoring, the magnetic float ball level switch stands out as a cornerstone technology. Its reputation for reliability is well-earned, hinging on a simple yet robust operating principle. At Sanlo, we engineer these switches to deliver unwavering performance in demanding environments, from industrial water tanks to chemical processing. The heart of its reliability lies in its sealed, non-contact magnetic actuation. A steel float ball, containing a permanent magnet, moves with the liquid level. This magnet triggers a hermetically sealed reed switch within the central stem, making or breaking the electrical circuit without any mechanical linkage to the exterior. This isolation from the process media is what guarantees long-term, fail-safe operation, preventing leaks and switch failure.

The consistent performance of a Sanlo magnetic float switch is defined by its precise engineering and high-quality specifications. Below are the key parameters that contribute to its dependable function.

Core Product Parameters & Features:

• Construction Material: The float and stem are crafted from 316 Stainless Steel, offering superior corrosion resistance against water, oils, mild chemicals, and high-pressure steam.

• Operating Principle: Utilizes a permanent magnet inside the float ball and a hermetically sealed reed switch for contactless, wear-free switching.

• Electrical Specifications: Standard models are rated for 70W (250V max) switching power. Options for low-power or high-current applications are available.

• Process Connections: Versatile mounting with choices like 1" NPT, G1", or flange adapters to suit various tank designs.

• Float Options: Standard Steel Float Ball for most liquids; optional Teflon-coated or entirely PP/PVDF floats for aggressive chemicals.

• Temperature & Pressure Range: Designed to operate reliably from -10°C to 120°C and withstand pressures up to 30 bar, depending on the model.

Steel Float Ball Level Switch FAQ

Q: Can the switch point (ON/OFF level) be adjusted after installation?
A: Yes, a key feature of Sanlo switches is adjustability. For single-level models, the float ball position on the stem can often be recalibrated. Multi-level switches with fixed reed switches in the stem provide predefined set points.

Q: How does it handle viscous or dirty liquids that might cause the float to stick?
A: For mildly viscous fluids, selecting a larger float ball size and ensuring proper clearance between the float and stem is crucial. For environments with heavy sludge or buildup, Sanlo recommends regular inspection or exploring alternative level technologies suited for extreme fouling.

Q: What is the main difference between a single-point and multi-point magnetic float switch?
A: A single-point Steel Float Ball Level Switch controls one specific liquid level (e.g., pump ON at low level). A multi-point version has several reed switches embedded along the stem length, allowing control at multiple levels (e.g., low alarm, pump start, high alarm) using a single float ball.

In summary, the reliability of a magnetic float ball level switch for liquid level control is exceptional, provided it is correctly specified for the application. With their robust Stainless Steel construction, contactless switching, and straightforward design, Sanlo switches are built to deliver years of trouble-free service. For a solution that balances proven mechanics with dependable performance, look no further.

Ready to specify the right level switch for your system? Contact us today to discuss your application requirements with our technical experts and receive a tailored recommendation from the Sanlo portfolio.