Measuring apparatus and instruments, namely, contact or contactless electrical transducers, pneumatic comparators and air plug ratio gauges, calorimeters and micro- calorimeter, spectrometers for measuring radiation other than for medical purposes, image scanners, dosimeters, apparatus and instruments for the purposes of metering, recording and measuring tactile or non-contact dimensional measurements, namely, flowmeters, micrometers, dimension or length measuring gauges, optical frequency me...