Extech 461891 Contact Tachometer

Features:

• Large 5 digit LCD display is easy to read
• Built-in memory recalls last MAX/MIN value stored
• Autoranging with 0.05% accuracy
• Contact measurements from 0.5 to 19,999 RPM 
• Linear surface speed measures in ft/min or m/min
• Simply contact rotating object with sensor tip and read
• Accessory wheels enable tachometer to measure linear surface speeds
• Complete with cone tip, flat tip and spare wheel for surface speed 
  measurements, four 1.5V AA batteries and case