Test instruments and accessories for heating, ventilating, and air conditioning repair and appliance repair, namely, vacuum and pressure gauges, digital multimeters and current probes, temperature and humidity testers and thermostats, temperature alarms and controls, electronic data loggers, strip chart and circular chart recorders for temperature, humidity, pressure, voltage and current readings, thermometers, calculators, scales, water alarms, voltage detectors, electrical wire terminals, e...