Surveying instruments; counters, namely, Geiger counters, thread counters, and automatic pill counters and meters, namely, electric meters, water meters, gas meters, vibration meters, and pH meters; Detectors, namely, radon detectors, smoke detectors, motion detectors, and metal detectors; Measuring apparatus, namely, pressure measuring apparatus, hourglasses, rain gauges, and laser distance meters; Gauges, namely, level gauges, depth gauges, pressure gauges, and ring gauges; Surveying appara...