NS210 Tuning Fork Level Switch

Product Overview

The NS210 Tuning Fork Level Switch is a universal point level sensor designed for reliable level detection of liquids and solid bulk materials in demanding industrial environments.

The tuning fork is continuously excited by a piezoelectric crystal, causing it to vibrate at a specific frequency. When the fork is immersed in a liquid or covered by solid material, the vibration frequency changes. This change is detected by the internal electronic circuit, allowing the sensor to accurately determine the presence or absence of material.

Unlike conventional level switches, the NS210 is not affected by the dielectric properties of the medium, turbulence, agitation, foam, vibration, or electrical parameters. With no moving mechanical parts, it requires virtually no maintenance and provides long-term reliable operation, making it an ideal solution for complex industrial level measurement applications.

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Operating Principle

The NS210 Tuning Fork Level Switch operates using the vibrating fork principle.

A built-in piezoelectric crystal continuously excites the stainless steel tuning fork, causing it to vibrate at its natural resonant frequency.

• When the tuning fork is exposed to air, it vibrates freely at a constant frequency.
• When the fork contacts a liquid or becomes covered by a solid material, the vibration frequency changes.
• The internal electronic circuit continuously monitors this frequency variation.
• Once the preset threshold is reached, the controller changes the relay output to indicate the material level.

This measurement method is highly stable and remains unaffected by process conditions such as turbulence, foam, bubbles, vibration, or changes in dielectric properties.

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Product Features

• Universal point level detection
• Suitable for both liquids and solid materials
• Vibrating tuning fork measurement technology
• No moving mechanical parts
• Maintenance-free operation
• High reliability under harsh industrial conditions
• Not affected by medium density or dielectric properties
• Resistant to turbulence, agitation, foam, and vibration
• Stainless steel wetted parts
• Relay output
• Normally Open (NO) / Normally Closed (NC) selectable
• AC or DC power supply options
• Compact electronic housing available
• Rugged industrial housing available
• Adjustable switching delay (rugged version)
• IP65 protection rating

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Product Applications

The NS210 Tuning Fork Level Switch is widely used in:

• Hydraulic systems
• Lubrication systems
• Pump protection
• Cooling systems
• Pulp and paper processing
• Water treatment
• Food and beverage processing
• Chemical industry
• Industrial storage tanks
• Process vessels
• Bulk material handling
• Powder and granule storage

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Product Advantages

The NS210 offers several advantages over traditional level switches:

• No mechanical wear due to the absence of moving parts
• Stable operation under complex process conditions
• Minimal maintenance requirements
• Suitable for both liquid and solid level detection
• Reliable switching performance
• Simple installation
• Long service life
• Excellent resistance to industrial interference

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Technical Specifications

Measurement Performance

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Electrical Specifications

DC Power Supply Version

AC Power Supply Version

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Output

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Temperature

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Materials

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Protection & Electrical Connection

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wiring Diagram

Dimensional drawing (mm)

 

Typical Applications

The NS210 Tuning Fork Level Switch is commonly installed in:

• Storage tanks
• Chemical process vessels
• Water treatment systems
• Hydraulic oil reservoirs
• Lubrication systems
• Pump protection systems
• Cooling circuits
• Food processing equipment
• Beverage production lines
• Powder silos
• Bulk material hoppers

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Frequently Asked Questions (FAQ)

What materials can the NS210 detect?

The NS210 is designed to detect both:

• Liquids
• Solid particles and bulk materials

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How does the tuning fork level switch work?

A piezoelectric crystal continuously excites the tuning fork. When the fork contacts a liquid or solid material, its vibration frequency changes. The electronics detect this change and activate the relay output.

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Is the NS210 affected by foam or turbulence?

No. The vibrating fork technology is designed to operate reliably even in environments with:

• Turbulence
• Agitation
• Foam
• Bubbles
• Mechanical vibration
• Changes in dielectric properties

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Does the NS210 require regular maintenance?

No. Since the sensor contains no moving mechanical parts, routine maintenance requirements are extremely low.

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Can the relay output be configured?

Yes. The relay output supports both:

• Normally Open (NO)
• Normally Closed (NC)

Users can configure the switching logic according to application requirements.

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Why Choose the NS210 Tuning Fork Level Switch?

The NS210 Tuning Fork Level Switch provides dependable point level detection for both liquids and solid materials using proven vibrating fork technology. With no moving parts, relay output, IP65 protection, selectable AC/DC power supplies, and resistance to turbulence, foam, vibration, and changing dielectric properties, it delivers reliable, maintenance-free performance for demanding industrial applications such as water treatment, hydraulic systems, chemical processing, food production, and bulk material handling.