Amazon
Make contact measurements of rotating objects Measure linear surface speeds in ft/min or m/min using the three accessory wheels provided 0.05% accuracy Recalls Last/Max/Min values
Make contact measurements of rotating objects Measure linear surface speeds in ft/min or m/min using the three accessory wheels provided 0.05% accuracy Recalls Last/Max/Min values
Radwell UK
ACCURATE UP TO 0.05%, 0.1 RPM RESOLUTION, CONTACT TACHOMETER