Vibration Level Switch
Product Overview
A Vibration Level Switch is an industrial sensor used to detect the presence, absence, or level of solids or liquids in a vessel through vibration analysis. It provides simple, reliable, and non-contact level detection, commonly used in bins, hoppers, tanks, silos, and pipes.
These switches are especially useful where traditional float or ultrasonic level switches are impractical due to dust, turbulence, foam, or extreme temperatures.
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How it works (simple explanation)
A vibration level switch typically has a vibrating probe or tuning fork that oscillates at a fixed frequency.
- When the probe is not covered by material, it vibrates freely.
- When material (liquid or solid) contacts the probe, the vibration changes.
- An internal circuit detects this change and switches an output signal (ON/OFF) to indicate the presence of level.
Think of it like a tuning fork: when struck it vibrates — but if you cover it with material, the vibration changes, and the device senses that change.
What it measures
- The vibration level switch measures the presence or absence of material at a specific point, not continuous level like some sensors. Typical measurements include:
- High level alarm (material has reached a maximum point)
- Low level alarm (material has dropped below a minimum point)
- Point level detection (true/false at one set position)
- It does not provide continuous level data, but rather a point status.
Key advantages
- Simple and robust design – ideal for harsh industrial environments
- Insensitive to dust, foam, turbulence, pressure changes, or vibration
- No moving parts (in many models) → low maintenance
- Works with solids & liquids (fine powders to viscous media)
- Fast response time
- Wide temperature and pressure ranges
- Can be used in conveyors, silos, tanks, sumps
Applications
- Liquid Level Control
- Pump protection in sumps, tanks
- Overflow detection
- Interface level (light/heavy liquids)
- Solid Bulk Materials
- Hopper or silo full/empty detection
- Conveyor blockage
- Powder level detection in bins
- Industrial Processes
- Chemical, food & beverage, pharmaceuticals
- Cement, mining, aggregate, plastics
- Water/wastewater treatment
- Power plants
Installation
- Install at the desired detection point (e.g., high/low level)
- Mount vertically or horizontally per manufacturer instructions
- Ensure the probe is in direct contact with material at the set point
- Avoid mounting near agitators or turbulent zones
- Maintain proper clearance from walls or structures
- Follow device terminal markings (e.g., NO/NC, common)
- Connect power according to voltage rating
- Use proper shielding/grounding for signal stability
- Some models may require simple tuning or sensitivity adjustment
- Once installed and powered, verify the switch trips correctly with material present/absent
Technical Specifications
Parameter | Specification |
Switch Type | Vibration fork / Tuning fork / Vibrating rod |
Detection Point | Single point, fixed level |
Output Type | Relay, switch contact (NO/NC), transistor |
Power Supply | 12–24 VDC / 110–240 VAC (model-dependent) |
Process Temperature | −40°C to +250°C (−40°F to +482°F) |
Process Pressure | Vacuum to 40 bar (model-dependent) |
Enclosure Rating | IP65 / IP67 / IP68 options |
Materials of Construction | Stainless steel, Hastelloy, PTFE coating options |
Response Time | <1 sec (typical) |
Cable / Connector | M12, DIN, gland entry, armored cable |
Hazardous Area Approvals | ATEX, IECEx, FM (optional) |
Mounting Threads | ½″ NPT, ¾″ NPT, G1/2, flange (vary by model) |
Repeatability | High, typically <1 mm deviation |
Operating Frequency | ~100–400 Hz (probe dependent) |