Measuring and testing machines and instruments, namely, digitizers, wearable activity trackers, temperature indicators, measuring instruments in the nature of gasometers, thermometers, not for medical purposes, water meters, precision balances, planimeters, derived-unit measuring machines and apparatus, pressure gauges, level indicators, acoustic meters, tachometers, accelerometers, refractometers, photometers, altimeters, hygrometers, illuminometers, vibration meters, noisemeters, speed indi...