9 Controlling, measuring and testing equipment for use in refrigeration and air conditioning applications, namely, electronic leak detectors for gases, electronic refrigerant gas analyzer, ultrasonic leak detectors for pressure and vacuum pumps, electronic charging and recovery scales for use in weighing refrigerant cylinders in HVAC systems before a charge is made, thermometer and anemometer, hygrometer, superheat calculator analyzers for use in measuring the superheat condition of HVAC systems, pyrometer, electronic and ultrasonic measuring apparatus for measuring distances, areas and volumes, electronic areas and volumes meter, temperature recorders, namely, temperature indicators, electronic temperature controllers for use in HVAC systems, electronic cold store alarm unit, namely, electronic alarms for use in detecting temperature changes in cold storage facilities; hermetic compressor analyzers for use in testing the electric current of hermectic compressors, electronic insulation tester and megohmmeter, capacitor amperage and voltage testers, digital clamp multimeter and voltage tester, calibratable pressure gauges, vacuum gauges, heat pump defrost timer and thermostat, thermostat for refrigerating cases and coils, solid state timers, fan delay timers, motor and compressor protector for voltage surge and/or circuit overload, video and electronic phase loss monitor for monitoring voltage loss, electronic time delay relays, electronic acid and moisture tester, tube adapter for charging and testing, namely, adapters used to connect electric charging and testing lines to hermetic compressors, automatic pressure control instruments and cooling tubes for heat exchangers in the nature of valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines, namely, voltage surge blowout protectors and coolant-temperature sensors; electronic change over switches for fan-coil systems; inspection mirrors for use in cleaning tubes