Detect and indicate the relative amplitude of vibration of diesel engines, air compressors, turbines and other machinery rotating at high speed. Especially useful for comparing one set of readings to a subsequent set under different load conditions. Dial indicator is set in a heavy metal retaining ring, the bottom of which is fastened to a coiled spring and steel plate holding 3 soft rubber shoes. The dial indicator, which is set to zero by rotating its bezel, may be removed from the vibrometer for other shop uses.
