The VSAN Vibrating Level Switch is a highly reliable point level detection instrument designed for accurate monitoring of liquids, powders, granules, fine bulk solids, and slurry materials in industrial storage tanks, silos, hoppers, pipelines, and process vessels. Based on the proven vibrating fork (tuning fork) technology, the switch provides dependable high-level, low-level, and demand-level detection for process control, overflow prevention, dry-run protection, and inventory management.
Unlike conventional float or mechanical level switches, the VSAN Vibrating Level Switch has no moving mechanical parts, ensuring exceptional reliability, long service life, and virtually maintenance-free operation. Its robust construction allows it to operate efficiently even in harsh industrial environments involving dust, foam, turbulence, vibration, sticky materials, or process agitation.
The sensing element consists of a precision-engineered vibrating tuning fork that is continuously excited at its natural resonant frequency using piezoelectric crystals. When the fork comes into contact with the process material, the vibration frequency changes significantly due to damping. The electronic circuitry detects this frequency change and immediately activates the output relay or electronic switching signal, providing fast and accurate level detection.
The VSAN Vibrating Level Switch is suitable for a wide variety of process media including water, wastewater, chemicals, acids, alkalis, diesel, furnace oil, lubricating oil, edible oil, milk, beverages, pharmaceutical liquids, solvents, slurries, cement, fly ash, sand, coal, plastic granules, grains, sugar, flour, powders, pellets, and other bulk solid materials.
Manufactured using premium-quality materials such as SS304, SS316, SS316L Stainless Steel, Hastelloy C, PTFE-coated forks, and corrosion-resistant engineering materials, the switch provides excellent resistance to corrosion, abrasion, pressure, temperature, and aggressive chemicals. Different process connections including Threaded, Flanged, Tri-Clamp (Sanitary), and Custom Mounting are available to suit various industrial installations.
The VSAN Vibrating Level Switch provides Relay (SPDT), PNP/NPN Transistor, NAMUR, and optional 4–20 mA diagnostic outputs, ensuring seamless integration with PLC, DCS, SCADA Systems, Alarm Panels, Pump Controllers, Solenoid Valves, and Industrial Automation Systems.
Advanced electronics incorporate automatic frequency tracking, self-diagnostic functions, LED status indication, fail-safe operation, EMI/RFI protection, temperature compensation, and programmable switching delay, ensuring stable and reliable operation even under challenging process conditions.
Designed for demanding industrial environments, the switch features a rugged IP66/IP67/IP68-rated weatherproof enclosure, with optional Explosion-Proof (Ex-proof) versions available for hazardous areas. Its compact design, simple installation, and low maintenance requirements make it an ideal choice for continuous industrial operation.
The VSAN Vibrating Level Switch is widely used in Oil & Gas Industries, Chemical Processing Plants, Petrochemical Industries, Water & Wastewater Treatment Plants, Food & Beverage Industries, Pharmaceutical Manufacturing, Power Plants, Cement Plants, Steel Industries, Mining Industries, Paper & Pulp Mills, Marine Applications, Storage Silos, OEM Equipment, and Industrial Automation Systems, where reliable point level detection is essential.
With its advanced vibrating fork technology, rugged construction, and intelligent electronics, the VSAN Vibrating Level Switch provides a dependable and maintenance-free solution for industrial level control applications.
The VSAN Vibrating Level Switch operates on the Vibrating Fork (Tuning Fork) Principle.
The sensing fork is continuously excited by piezoelectric elements, causing it to vibrate at its natural resonant frequency.
When the fork is surrounded by air, it vibrates freely at a constant frequency. As the process material reaches and covers the vibrating fork, the vibration is dampened, resulting in a measurable change in frequency and amplitude.
The internal electronic circuit continuously monitors these changes. Once the preset threshold is reached, the electronics activate the relay or electronic output signal.
This switching signal is transmitted to PLC, DCS, SCADA systems, pump controllers, alarm systems, or process control equipment, enabling applications such as high-level alarm, low-level alarm, overflow protection, dry-run protection, and automatic process control.
When the material level falls below the sensing fork, the fork returns to its original resonant frequency, automatically resetting the switch for continuous operation.
Since the switch has no moving mechanical components, it delivers excellent repeatability, fast response, and long-term reliability with minimal maintenance.
The VSAN Vibrating Level Switch is widely used for point level detection and process automation across various industrial sectors.
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