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

Split Core |
Min (on) |
Max A |
Output* |
Sensor Power |
C-2350VFD |
0.5A |
135A |
1.0A@30VAC/DC |
Induced |
Command Relay |
Contact rating |
Coil |
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CR3-24 |
N.O. 10A@125VAC |
24VAC/DC, 15mA nom. |
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CR4-24 |
N.C. 10A@125VAC |
24VAC/DC, 15mA nom. |
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CR3-12 |
N.O. 10A@125VAC |
9-12VDC, 30mA nom. |
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CR4-12 |
N.C. 10A@125VAC |
9-12VDC, 30mA nom. |
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Specifications |
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Standard Output Rating |
1.0A@30VAC/DC |
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Output Type |
NO, solid-state FET |
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Turn-On Amperage |
1A(30Hz min), 1.5A(20Hz min), 2.5A(10Hz min) |
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Environmental Rating |
5-140 °F (-15-60 ° C) |
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Insulation Class |
600V RMS. For use on insulated conductors only! Use minimum 75 ° C insulated conductor |
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Frequency Range |
10 -120Hz; proof of flow loss alarm at 40Hz+ |
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Dimensions (LxWxH) |
2.51"x 2.23"x 0.82" (1.4"H with optional relay module) |
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Sensor Aperture |
0.75" |