Standard 7-Inch Vibrating Rod

Model: VR-21

The VR-21 standard piezoelectric driven vibration point level switch has a unique single-rod probe design with a sword-shaped blade to prevent bridging of material by allowing material to easily flow by, protecting against buildup on the blade. Suitable for both top and side mount applications and ideal for a wide variety of dry and bulk powder materials, the VR-21 has optional hazardous location approvals to CSA standards for Class II, Division I, Groups E, F, and G in the US and Canada. It features three sensitivity adjustments–high for light and fluffy materials, medium, and low for heavier materials or materials that may tend to cling to the vibrating rod.

  • Suitable for high and low level indication, or plugged chute detection
  • Detects extremely light, fluffy materials and materials with low dielectric constants
  • Materials densities from 1.25 lb./cu. ft.
  • Carbon black, plastics, fly ash, feed, seed, grain, food, chemicals, and other materials
  • Unique “blade” probe design reduces false alarms caused by buildup
  • No calibration required
  • Wear and maintenance free
  • No moving parts
  • Three sensitivity adjustments
  • Universal power supply
  • Self-cleaning sensor
  • Remote electronics available
  • Switch selectable high/low fail-safe

Power Requirements: Wide range 20-250V AC/DC

Relay: DPDT 

Time Delay: 1 second from stop of vibration, 2 to 5 seconds for start of vibration

Ambient Temp: -4°F to +140°F (-20°C to +60°C)

Process Temp: To 176°F standard (80°C); to 284°F high temp (140°C)

Pressure: 145 psi

Enclosure: Die cast aluminum, NEMA 4, 5 & 12

Probe: 304 stainless steel, 7.37” insertion length

Mounting: 1-1/2” NPT

Material Densities: From 1.25 lb./cu. ft.

Approvals: CSA hazardous location approvals for Class II, Groups E, F & G (optional)