Extech 461895 Combination Contact/Photo Tachometer with NIST

Item #:

EXT-461895-NIST

Brand:

Extech

Our tech experts are ready to help!

Share this product:

461895 Combination Contact/Photo Tachometer with NIST by Extech

Unique display where characters reverse direction depending on measurement mode you are in
Large 0.4" (5 digit) LCD display
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

General Specifications

Circuit	Custom one-chip LSI microprocessor circuit.
Time base	Quartz crystal
Display	5 digit, 10 mm (0.4") LCD display with function annunciation
Measurement	Photo Tachometer - 5 to 99,999 rpm Contact Tachometer - 0.5 to 19,999 rpm Surface Speed - 0.2 to 6,560 ft/min Surface Speed - 0.05 to 1,999 m/min
Memory	Last value, last max. reading, last min. reading
Sampling Time	Photo Tachometer - 1 sec. (over 60 rpm) Contact Tachometer - 1 sec. (over 6 rpm)
Detecting Distance - Photo Tachometer	50 to 150 mm (2 to 6 inches) depending on ambient light
Operating Temperature	32 °F to 122 °F (0 °C to 50 °C)
Power Supply	4x 1.5 V AA (UM 3) batteries
Weight	0.66 lbs. / 300g (including battery)
Size	8.5 x 2.6 x1.5" (215 x 65 x 38mm)
Accessories	Reflective tape (23"), cone and funnel rpm adaptor, surface speed test wheel, and carrying case

Electrical Specifications

Measurement	Range	Resolution	Accuracy (% rdg)
Photo Tachometer	5 to 99,999 rpm	0.1 rpm (0.5 to 999.9 rpm) 1 rpm (over 1000 rpm)	± (0.05% + 1 digit)
Contact Tachometer	0.05 to 19,999 rpm	0.1 rpm (0.5 to 999.9 rpm) 1 rpm (over 1000 rpm)	± (0.05% + 1 digit)
Surface Speed	0.2 to 6560 ft/min	0.1 ft/min (0.1 to 999.9 ft/min) 1 ft/min (over 1000 ft/min)	± (1% rdg + 1d)
Surface Speed	0.05 to 1999.9 m/min	0.01 m/min (0.05 to 99.99 m/min) 0.1 m/min (over 100 m/min)	± (1% rdg + 1d)