Product Description

Photo/Contact type Digital Tachometer
Measuring Range: Photo tach 2.5 to *9,**9 RPM
                                  contact tach 0.5 to *9,**9RPM
                                  surface speed 0.*5 to ***9.9m/min
Resolutions: 
Photo tach 0.1RPM(2.5 to **9.9 RPM) 1RPM(over ***0RPM)
Contact tach 0.1RPM(0.5 to **9.9RPM) 1RPM(over ***0RPM)
Surface speed 0.*1m/min (0.*5to *9.*9m/min)
                          0.1m/min (over **0m/min)
Specification
Display: 5 digital, *8mm (0.7" yellow green backlight LCD)
Accuracy: ±(0.*5% + 1 digit)
Sampling time: 0.8sec.(over *0RPM)
Range Select: Auot-Range
Time Base: Quartz crystal
Detecting distance: *0mm~**0mm(photo)
Battery: 4*1.5v AAA
Power consumption: approx.*5mA