Shaft Tachometers
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Shaft Speed Tachometer System




The bi-directional shaft tachometer system consists of two proximity sensors, a signal conditioner (STC-206C) and an analog meter (STC-AMT). The sensors detect the scanning target (mounted on the rotating shaft of the machinery) and produce a frequency signal which is converted into a linear output signal (by the signal conditioner) and fed into the analog meter.



  • Accurate and reliable
  • Speed range from 0 rpm up to 2000 rpm
  • Bi-directional operation (using a single target)
  • Wide air gap between pickup and target (<= 5mm)
  • Independent zero and span adjustments
  • High quality, illuminated panel meter
  • Able to drive two panel meters in parallel


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


Connection Diagram

Shaft Speed Tachometer Connection Diagram



Shaft Speed Tachometer Dimensions




Scale Type


Standard (200, 400, 500 or 600 rpm)Custom (Available on request)

Scale Range

250 deg Deflection, 0 to 2000 rpm (per direction)

Scale Illumination

LED Illuminated Dial
Operating Voltage: 24 VDC

Scale Calibration

Zero adjustment (electrical and mechanical),
Span Adjustment (electrical)

Scale Accuracy

+/- 1 % of full scale


2 x Proximity Switch (w/ bracket and scanning target)
Detection Distance <= 5mm

Input Voltage

24 VDC



Operating Temperature

-20 to 50 degC

Operating Relative Humidity

0 to 95% (non-condensing)


STC-AMT: Dust-Protected Plastic CaseSTC-206C: IP55 PVC Enclosure


STC-AMT: 500 g
STC-206C: 450 g


STC-AMT: 100(H) x 110(W) x 85(D)
STC-206C: 120(H) x 165(W) x 80(D)


1 Year


Ordering Information (Part Numbers)

  • STC-206C: Analog Signal Conditioner Unit for STC-206 System
  • STC-AMT: Bi-Directional Analog 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-206(SET1): Analog Bi-Directional Shaft Tachometer System consisting of 1 x STC-206C, 1 x STC-AMT, 2 x STC-PXS, 1 x STC-BKT, 1 x STC-TGT


Request for Quote / +65 68534245

Our Address:
10 Admiralty Street, 
#04-76, North Link Building, 
Singapore 757695
Hours of Operation:
Mon. to Fri.: 8.30am to 6.00pm
Weekends & Public Holidays: Closed

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