Fluke 931 ESP Contact and Non-Contact Dual-Purpose Tachometer


Key Features:

  • 6-digit backlight display reads the data clearly
  • Signal detection reminder avoids invalid detection actions
  • Maximum/minimum/average value and final readings
  • Setting/Turning off the automatic power-off function
  • Small size and easy to hold
  • Easy switching of the contact and non-contact measurement modes
  • Different speed measuring heads and rotational speeds adapt to different measurement occasions
  • 1-year warranty
Product Options:

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The Fluke 931 ESP contact / non-contact handheld tachometer is able to measure the revolutions per minute (RPM) or surface speed and distance accurately.

Rotation speed measurement
Range Optical (non-contact) measurement: 1 to 99999 revolutions/minute
Contact measurement: 1 to 19999 revolutions/minute (Fluke 931 only)
Precision ±0.02%RD+1
Sensing distance (optical) 500 mm


Battery type (2) 1.5V LR6 (alkaline) AA battery
Battery life About 40 hours
Operating temperature 0°C to 50°C
Storage temperature -20°C to 70°C
Weight 250 g
Dimensions 175 × 60 × 28 mm
Warranty period 1 year
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  • • Heavy manufacturing environments, e.g. automotive, textile, pulp and paper, metalwork
  • • Water purification plants
  • • Machining and chemical manufacturing plants
  • • HVAC compressors for industrial systems