The Bi-Directional Shaft Speed Tachometer System consists of two proximity sensors, a Signal Conditioner (STC-207C) and a Digital Display (STC-DMT). The sensors detect the metallic target (mounted on the propeller shaft or other machinery shaft) and produce a frequency signal which is read by the Signal Conditioner. The Signal Conditioner will send data via a RS-485 data link to the digital display which shows the RPM readings.

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  • Highly accurate (accurate within 1 rpm)
  • Reliable operation
  • Speed range from 0 rpm up to 1500 rpm
  • Bi-directional operation (using a single target)
  • Wide air gap between pickup and target (<= 5mm)
  • Independent zero and span adjustments
  • High quality, illuminated digital meter (with RPM scale and digital RPM readout)
  • Panel Mountable Digital Meter (DIN Box)
  • Auto dimming LED display
  • Able to interface to more than 10 digital meters!
  • Able to work across long cabling distances (up to 300 meters)


Best suited for monitoring speed and direction of rotation of marine propeller shafts and other low to moderate speed machineries

Ordering Information (Part Numbers)

  • STC-207C: Digital Signal Conditioner Unit for STC-207 System
  • STC-DMT: Bi-Directional Digital RPM Meter
  • STC-PXS: Proximity Sensor with 2m cable and connector
  • STC-BKT: Bracket for STC-PXS (Proximity Sensors)
  • STC-TGT: Magnetic Target with Belt and Clip (attached around propeller shaft)
  • STC-207(SET1): Digital Bi-Directional Shaft Tachometer System consisting of 1 x STC-207C, 1 x STC-DMT, 2 x STC-PXS, 1 x STC-BKT, 1 x STC-TGT

Do you have any special request?

Don't hesitate to contact us!