Contact Tachometer with NIST Certificate, Large 5 digit LCD display is easy to read, Built-in memory recalls last MAX/MIN value stored, Contact measurements from 0.5 to 19,999rpm plus linear surface speed measures in ft/min or m/min, Autoranging with 0.05% accuracy, 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.

• 0.05% basic accuracy
• Make contact measurements of rotating objects
• Measure linear surface speeds in ft/min or m/min using three accessory wheels provided
• Recalls Last/MAX/MIN values
• Large 5 digit LCD display is easy to read
• Accessory wheels enable tachometer to measure linear surface speeds
• NIST Certification