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Home > Current Sensors & Transducers > Current Sensor - Autoset-VFD

Current Sensor - Autoset-VFD

  • Self-calibrating for proof of flow
  • 0.5-135A range
  • N.O. 30VAC/DC or 120VAC output
  • Optional command relay


  • Detecting belt loss, coupling shear, and mechanical failure on variable frequency drives


The AutoSet™ VFD line self-calibrates to detect belt loss on motors operated by a variable frequency drive. The C-2350VFD line’s microprocessors automatically set the proper threshold - no
false alarms with varying frequencies. Sensor will detect motor undercurrent conditions such as belt loss, coupling shear, and mechanical failure on fans and pumps while reducing installation

Product     Price   Quantity
C-2350VFD Current Switch, AutoSet, VFDSplit-core, 3.5-135A range   $ 147.00
C-2350VFD-L Current Switch, AutoSet, VFDSplit-core, 0.5-15A range   $ 168.00
C-2350VFD-HV Current Switch, AutoSet, VFDSplit-core, 3.5-135A range   $ 156.00
CR3-12 Command Relay, N.O., 12 VDCcoil   $ 25.50
CR3-24 Command Relay, N.O., 24 VAC/DCcoil   $ 25.50
CR4-12 Command Relay, N.C., 12 VDCcoil   $ 25.50
CR4-24 Command Relay, N.C., 24 VDCcoil   $ 25.50


List prices shown; trade pricing appears on orderpad for Senva Trade Accounts.
For qualified trade pricing, please contact us at 866-660-8864.
Oregon has no sales tax.

Self calibration for proof of floor on fans and pumps

  • Works without costly 'training' of sensor - our sensors are just plain smarter!
  • No need to open hot starter enclosures - save on labor as well as improve safety
  • Only VFD sensor line capable of functioning on VFDs to 0.5A
  • Sensor is always properly adjusted—no call backs
  • Push-button and LED interface:
    • Slow blink = normal operation
    • Fast blink = alarm
    • Fast learn mode (optional): Press/hold button 1 second, LED makes 2 fast blinks.
    • Go/No mode (optional) : Press/hold button 5 seconds, LED makes 3 fast blinks.

Split-core with optional command relay

  • Easy installation and provides stop/start/status in unitary device—saves component and installation space/cost

Maintenance-free—no call backs

  • Superior to differential pressure sensors
  • Industry leading 7 year warranty
Split Core Min (on) Max A Output* Sensor Power
C-2350VFD-L 0.5A 15 A 1.0A@30VAC/DC 12 to 30VDC/ 24VAC
C-2350VFD 3.5A 135A 1.0A@30VAC/DC Induced
C-2350VFDHV 3.5A 135A 0.2A@120VAC Induced
Command Relay Contact rating Coil
CR3-24 N.O. 10A@125VAC 24VAC/DC, 15mA nom.
CR4-24 N.C. 10A@125VAC 24VAC/DC, 15mA nom.
CR3-12 N.O. 10A@125VAC 9-12VDC, 30mA nom.
CR4-12 N.C. 10A@125VAC 9-12VDC, 30mA nom.
Standard Output Rating 1.0A@30VAC/DC
Line Voltage Output Rating 0.2A@120VAC (-HV MODEL ONLY)
Output Type NO, solid-state FET
Temperature Rating -15-60 ° C
Insulation Class 600V RMS. For use on insulated conductors only! Use minimum 75 ° C insulated conductor
Frequency Range 50/60Hz