Fluke Contact and Non-Contact Dual-Purpose 931 ESP

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

Includes:

• 0.1 m wheel
• Conical speed measuring head
• Inner cone speed measuring head
• Lengthening rod
• 10 reflective stripes