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VR-21-C - Vibrating probe level sensor for hazardous locations


VR-21-X - Vibrating probe level sensor, 20 to 250V AC/DC, 7.37” insertion length, process temp to 176°F (80°C), triple thread screw-off cover, dual conduit entries, DPDT relay contacts, selectable fail-safe protection, FDA recognized powder coat finish, LED status indicator light; CSA C/US listed for Class ll, Groups E, F, & G.

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Standard length vibrating probe level sensor

Unique single-rod probe design with a sword-shaped blade to prevent buildup and bridging.

Looking for a point level sensor for light & fluffy or low dielectric materials?

The VR-21 piezoelectric vibration point level switch works even in carbon black, plastics, or fly ash

How it works:

The blade vibrates until the vibration is dampened when material covers it and triggers a relay indicating a covered condition.

VR-21 features you will love:

  • Unique blade probe design defies buildup to reduce false alarms
  • Works in low dielectric materials and light, fluffy materials with densities down to 1.25 lb./cu. ft.
  • 3 sensitivity settings and no calibration required for quick setup
  • Optional CSA hazardous location approvals to Class II, Division I, Groups E, F, and G
  • Universal power supply 20 to 250V AC/DC and switch selectable high/low fail-safe
  • Top or side mounting and a remote option to distance electronics from harsh environments

Overflow Prevention
High level alerts to avoid over-filling vessel


Material Outages
Low level alerts eliminate empty conditions


Plugged Chutes
Detect when chutes are clogged with material


Process Control
Switching relay to turn a process off or on


Conveyor Overload
Prevent jamming or damaging conveyors

More Information
Means of MeasurementVibrating Rod
Measurement TypePoint Level
Voltage 20 to 250 VAC/DC
OutputsRelay DPDT 10 Amp - 250 VAC max
Ambient Temperature-40°F to +150°F (-40°C to +65°C)
Process TemperatureUp to +300°F (148°C)
ApprovalsCSA Class II, Groups E, F & G
Enclosure TypeNEMA 4X, NEMA 5, NEMA 12
Enclosure MaterialDie cast aluminum
Mounting1.5" NPT
Conduit Entry0.75" NPT

Mount Plates

Learn all about the types of vibrating probes.

See vibrating probes and other point level sensors.

See all the sensors in the corporate overview.

Standard Vibrating Probe Brochures

Standard Vibrating Probe Manuals

Standard Vibrating Probe Spec Drawings

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