Vibrating Rod Level Switch
The Vibrating Rod Level Switch is an economical and highly dependable point-level detection device designed for accurate monitoring of powders, granules, and bulk solids. It ensures reliable high or low-level indication in silos, hoppers, bins, and storage vessels, helping prevent overflow, material starvation, and process downtime.
Based on a piezoelectric vibration principle, the rod vibrates at its natural resonant frequency. When material contacts the probe, vibration damping occurs and the switch changes state instantly. The device is immune to variations in material density, moisture, dust, conductivity, or dielectric constant, ensuring stable performance even in harsh industrial environments.
Product Share on :Applications
- Level monitoring in silos, hoppers, bins, and storage vessels
- Grains, cereals, sugar, flour, milk powder, and animal feed
- Cement, fly ash, lime, chalk, silica, and construction materials
- Plastic granules, pellets, resins, and polymer powders
- Coal powder, carbon black, sawdust, wood chips, and light fibers
- Detergents, dyes, pigments, fertilizers, and chemical powders
Working Principle
The Vibrating Rod Level Switch operates using a piezoelectric crystal that excites the rod at a fixed resonant frequency. In free air, the rod vibrates continuously without obstruction.
When material covers the vibrating rod, the vibration is dampened due to the mass and resistance of the product. This change is sensed electronically and converted into a switching signal, activating or deactivating the output relay for alarm, conveyor control, or interlocking systems.
Construction
The instrument features a compact and rugged industrial design with a cast aluminum weatherproof enclosure offering IP65 / IP66 protection. The probe is manufactured from high-grade stainless steel (SS304 / SS316) to withstand abrasion, corrosion, and mechanical stress. Integral electronics ensure easy installation and long-term operational stability.
Installation
- Side or top mounting on silos, bins, hoppers, and process vessels
- Standard 1½” BSP male threaded or optional flanged connection
- Plug-and-play installation with no calibration required
- Field-selectable fail-safe mode for high or low-level protection
Technical Specifications
| System Type | Integral Type |
|---|---|
| Enclosure | Cast Aluminum, IP65 / IP66 |
| Probe Material | SS304 / SS316 |
| Supply Voltage | 24 VDC / 230 VAC (Factory Selectable) |
| Power Consumption | 3 VA Max |
| Output | DPDT Relay – 5A @ 230 VAC |
| Operating Temperature | -10°C to +180°C (With Standoff) |
| Operating Pressure | Up to 10 Bar |
| Process Connection | 1½” BSP Male / Flanged (Optional) |
Key Features
- Reliable vibration-based point level detection
- Unaffected by density, moisture, dust, or conductivity
- No moving parts for maintenance-free operation
- Compact design with integral electronics
- Field-selectable sensitivity and switching delay
- LED indicators for power, normal operation, and alarm
