Astech Electronics  
Rotary Telemetry Experts (+44) 1420 22689
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Tachometer Systems


Shaft tachometer systems for harsh environment, marine and other applications.  Custom design service is also available. 




  • ■ High reliability systems utilising reflective infra-red technique
  • ■ Ahead / Astern or shaft rotation direction indication and adjustable display brilliance for night running
  • ■ Accurate readings from less than 1 RPM with options to over 100,000 RPM
  • ■ Fully encapsulated sensors with sealed steel connectors and steel slotted shaft ring assembly combine simple installation with really rugged shaft hardware
  • ■ Shaft split-rings fabricated according to shaft diameter, range 25mm - 1 metre
  • ■ Royal Navy and NATO approved



(Click on thumbnails to enlarge)



Large multiple displays for bridge, flying bridge and engine room location.

Dual sensor infra-red pickup.

Shaft mounting slotted ring.











Tachometer display unit panel mounting version.

Tachometer display unit panel mounting version.

Tachometer display in IP66 enclosure.






















Miniature encapsulated version of infra-red tachometer sensor head.

Miniature encapsulated version of infra-red tachometer sensor head.

Very compact version of infra-red pickup for use in turbocharger.