Extech 461895 Combination Photo/Contact Tachometer

461895 Combines both contact (0. 5 to 19,999 RPM) and non-contact (5 to 99,999 RPM) models for use in virtually all tachometer applications. Uses visible light for non-contact measurements up to 6 in. (150 mm) from target. Comes with wheels for linear surface speed (0.2 to 6560 ft. /minute; 0.05 to 1999.9 m/minute) or RPM measurements, 4 AA batteries, 23 in. (0.6 m) reflective tape, carrying case, and user manual

• Unique display where characters reverse direction depending on measurement mode you are in
• Large 0.4" (5 digit) LCD display
• Uses visible light to read up to 6" (150mm) from target
• Memory/readings button holds last reading for 5 min and recalls min/max readings
• Microprocessor based with quartz crystal oscillator to maintain high accuracy
• Tachometer memory stores last, max and min readings
• Provides wide RPM (photo and contact) and Linear Surface Speed (contact) measurements
• Accurate to 0.05% with max resolution of 0.1rpm in either photo or contact mode
• Complete with tips and wheel for rpm or linear surface speed, four 1.5V AA batteries, reflective tape and carrying case

• Resolution: 0.1rpm (< 1,000 rpm)/1rpm (>1000rpm)
• Power: 4 AA batteries
• Dimensions: 8.5x2.6x1.5" (215 x 65 x 38 mm)
• Weight: 10.6 oz (300 g)