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Fluke
- 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
- Optical (non-contact) measurement: 1 to 99999 revolutions/minute
- Contact measurement: 1 to 19999 revolutions/minute
- 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
The Fluke 931 tachometer is a handheld tachometer, which integrates the contact and non-contact speed measurement functions and can accurately measure the revolutions per minute (RPM) or surface speed and distance