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AutoSet Series

Self-calibrating Current Switch
Higher Reliability, Faster Installation, Superior Accuracy | Sense the Difference

 Autoset-VFD Current Switch

Self-calibrates to detect proof of flow. Optional CR-XX command relay for stop/start/status in one labor saving device. Low turn-on of 0.5A for proof of flow status on VFDs. No calibration typically required. Never clibrate in live enclosures again. Redicing risk of an arc flash. Proven 1/2 hour savings per install over manually calibrated devices. Utilizes a algorithm to detect belt loss on motors operated by variable frequency drives Buy American Act Certified

Self-calibrating for proof of flow
Works flawlessly on VFDs and constant volume applcations
0.5-135A range
N.O. 30VAC/DC output
Optional command relay with LED

  • Self-calibration for proof of flow on both VFD and contstant volume (CV) fans and pump applications
  • Works without costly 'training' of sensor - our sensors are just plain smarter!
  • No need to open energized enclosures - save on labor as well as improves safety
  • Only sensor line capable of functioning on VFDs to 0.5A
  • Sensor is always properly adjusted—no call backs
  • Push-button and LED for fast learn and go/no modes
  • Optional command relay for stop/start/status in unitary device—saves component and installation space/cost
  • Solid-state-more reliable than mechanical pressure switches for proof of flow
  • Quality backed by 7 year limited warranty!


The AutoSet™ VFD self-calibrates to detect proof of flow on both variable frequency driven and constant volume motors on fans or pumps. The C-2350VFD automatically sets the proper threshold, eliminating false alarms associated with varying frequencies. Detects motor undercurrent conditions such as belt loss, coupling shear, and mechanical failure on fans and pumps while reducing installation time. New super-low 0.5A turn-on--totally self-powered!


  • Detecting belt loss, coupling shear, and mechanical failure on variable frequency drives and constant volume fans and pumps.
  • Great for data center current switch sensing
Product Price Quantity
C-2350VFD Current Switch, AutoSet, VFD Split-core, 0.5-135A range
$155.82 /


CR3-12 Command Relay, N.O., 12 VDC coil
$26.20 /


CR3-24 Command Relay, N.O., 24 VAC/DC coil
$26.20 /


CR4-12 Command Relay, N.C., 12 VDC coil
$26.20 /


CR4-24 Command Relay, N.C., 24 VAC/DC coil
$26.20 /


All prices shown are excluding tax unless otherwise specified.