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New lcd digital laser & mechanical contact tachometer


New LCD digital Laser & mechanical contact tachometer
DELUXE 2IN1 DIGITAL LASER PHOTO / CONTACT TACHOMETER
* Measures exact RPM with no guessing or errors
* LCD Display : 5 digits, 18mm
Laser photo tachometer : 2.5 to 99,999 RPM (r/min)
Contact Tachometer : 0.5 to 19,999 RPM (r/min)
Surface Speed : 0.05 to 1,999.9 (m/min)
Laser photo tachometer : 0.1 RPM (2.5 to 9999.9 RPM) ; 1RPM (over 1000RPM)
Contact Tachometer : 0.1 RPM (0.5 to 9999.9 RPM) ; 1RPM (over 1000RPM)
Surface Speed : 0.01 m/min. (0.05 to 99.99 m/min.) ; 0.1m/min. (over 100m/min.)
* Accuracy : +/- (0.05% + 1 digit)
* Memory : max value, min value and last value
* Time base : 6 MHz crystal oscillator
* Used 4 x 1.5V AAA batteries
* Time-base accuracy: 10 X10-6 (0 ~ 50 )
* Current work: the largest 45 mA
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New lcd digital laser & mechanical contact tachometer