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Specifications: Fluke 931 Contact and Non-Contact Dual-Purpose Tachometers
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
Specifications
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
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