Overview
The side-mounted magnetic level gauge is a robust industrial instrument designed for accurate liquid level measurement in various process applications. Unlike top-mounted versions, this configuration offers space-saving installation on the side of tanks or vessels. Its operation relies on a magnetic float that rises/falls with the liquid level, causing magnetized indicator flags (flippers) to rotate, providing a clear visual indication. The design eliminates moving parts exposure to the process fluid, enhancing reliability.
Structure and Working Principle
The gauge consists of three main components: a measuring chamber (connected to the vessel), a magnetic float, and an indicator column with rotatable flags. The float contains permanent magnets that couple with the flags through the chamber wall. As liquid level changes, the float movement causes the bi-color flags to rotate 180°, creating a sharp color contrast (typically red/white) at the liquid interface. Some models incorporate auxiliary contacts or 4-20mA transmitters for remote monitoring.
Key Features
360° visibility allows reading from any angle, crucial for installations in confined spaces. The hermetically sealed design prevents fluid leakage and withstands pressures up to 6.4MPa in standard models. Corrosion-resistant materials like 304/316SS suit aggressive chemicals, while PTFE-lined versions handle highly corrosive media. Optional features include high-temperature designs (up to 400°C), explosion-proof certifications, and illuminated indicators for low-light conditions.
Application Areas
Predominantly used in chemical processing plants for acid/alkali storage tanks, where glass gauges would be hazardous. Petrochemical applications include hydrocarbon level monitoring in refineries. Power generation facilities employ them for boiler drum level indication, while water treatment plants use them for clarifier monitoring. Food/pharmaceutical versions meet sanitary standards with polished surfaces and FDA-approved materials.
Maintenance and Precautions
Routine maintenance involves checking flag movement smoothness and cleaning the indicator window. Magnetic strength degradation over 5-10 years may require float replacement. Avoid installing near strong electromagnetic fields that could disrupt magnetic coupling. For viscous fluids, select floats with higher buoyancy. Always verify compatibility between wetted materials and process chemicals before installation.
B2B Procurement Guide
Specify connection standards (flanged, threaded, or sanitary), with common sizes being DN20-DN150. Request material certificates for critical applications like ASME or PED compliance. For accurate quotations, provide fluid density (for float selection), specific gravity, and operating pressure/temperature. Lead times typically range 2-6 weeks for custom configurations. Bulk orders (10+ units) often attract 10-15% discounts from manufacturers.
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