Introduction:
The Compact Vibrating Fork Level Switch is a versatile and reliable device designed for detecting both solid and liquid materials in industrial applications. Featuring a fork-shaped sensor that vibrates at a specific frequency, the switch detects changes in vibration when it comes into contact with materials, signaling the presence or absence of the substance.
Applications
- All Liquids: Suitable for detecting levels of free-flowing liquids with viscosities up to 10,000 cP.
- Flow/No-Flow Detection: Effective in monitoring pipelines to determine the presence or absence of material flow.
- Side and Top Mounting: Adaptable for installation in various orientations to suit different tank or vessel configurations.
Key Features
- Compact Size: Allows for installation in tight spaces without compromising performance.
- Universal Power Supply: Operates on a wide range of industrial power supplies (15 to 80 VDC & 15 to 260 VAC).
- Low Power Consumption: Designed for energy efficiency, consuming minimal power during operation.
- No Calibration Required: Simplifies setup with a plug-and-play design that eliminates the need for calibration.
- Customizable Process Connections: Offers various threaded, flanged, or tri-clamp connections starting from ½” to accommodate different installation requirements.
- External Test Option: Features an external test capability using a magnet test key for easy functionality checks.
- Fail-Safe Operation: Provides selectable minimum and maximum fail-safe settings to enhance safety during operation.
- Temperature and Pressure Resilience: Handles process temperatures up to 150°C and pressures up to 15 bar, ensuring reliability in demanding conditions.
Working Principle
The switch operates by exciting piezo-electric crystals inside the tuning fork, causing the fork tines to vibrate at their natural resonance frequency in free air. When the fork tines are immersed in liquid, the frequency of vibration decreases due to the density of the liquid. This change in frequency is detected by the electronic circuit, which then signals the presence of the liquid.