Scientific, surveying, optical, weighing, measuring, signaling, and checking apparatus and instruments, namely, fiber optic meters, fiber optic instruments, namely, fiber optic light sources for use with fiber optic test meters, optically isolated adapter for printers and remote control devices, optically isolated external trigger probes for use with electronic measures; electronic test and measuring instruments and devices and electronic test tools, namely, local area network electronic meters, electronic cable mapping units, digital troubleshooting systems comprised of computer hardware and software used to diagnose and analyze electronic devices and computer hardware, electronic meters for testing automotive electrical systems, cable testers, cable identification modules for use with cable testers, protective holsters for electronic meters, computer software and hardware for use in testing and isolating faults in digital circuitry, electric apparatus for measuring the insulation of wires, cables, transformers and electrical motors, frequency counters, high frequency probes, frequency synthesizers, frequency comparators; apparatus and instruments for regulating, analyzing, and controlling electricity, temperature, humidity, and power, namely, current measuring clamps; electronic monitors and measuring devices, namely, electronic meters for analyzing the quality of electrical power, signal tracers for tracing and identifying electrical signals in electrical circuits and ultrasonic leak detectors; temperature profiling systems comprised of thermocouples and computer software for analyzing temperatures and logging data in the fields of electronics manufacturing, finishing, and food processing; measuring apparatus for temperature and humidity levels in gases and solid substances; thermocouples; thermometer readout devices comprised of thermometers not for medical purposes and digital readout units; thermometer calibrators; temperature and humidity meters not for medical use; electrical measuring and testing devices with electrical standards settings, namely, voltmeters, ammeters, and ohmmeters; portable oscilloscope devices, namely, integrated oscilloscope, digital multimeter, and paperless electronic data recorders sold as a unit; diagnostic equipment, namely, an optical source and power meter for measuring optical loss in fiber optic cabling systems; measuring and calibrating instruments, namely, fluid flow calibrators and meters; electronic circuit parts and accessories, namely, digital circuit adaptors, digital circuit connectors and digital circuit cables; test leads, in the nature of probes to connect electric test equipment to electronic devices for testing; voltmeter probes; oscilloscope probes; clips, namely, crocodile, alligator, bus bar, and piercing test clips, sold separately or as a unit with clamp meters for measuring electricity; battery packs; meters, namely, temperature meters and microamp meters for monitoring heating ventilation air conditioning units; measuring apparatus for refrigerant leak detection, namely, electronic leak detection hardware and operating software; infrared thermometer for temperature measurement without contact, not for medical purposes; electrical testers, namely, voltage testers, electrical ground testers; electrical insulation testers; digital multimeters; calibrators for calibrating thermometers, thermocouples, thermocouple probes, pressure transmitters, flow control valves, flow transmitters, temperature transmitters, and level transmitters; power quality meters; recorders, namely, data logger for recording voltage, amperage, and power measurements, electronic and digital voltage and power quality recorders and voltage and power event recorders; analyzers, namely, electronic analyzers for measuring and testing power; gas-flow analyzers; safety equipment, namely, electronic electricity analyzers; timer analyzers, namely, electronic analyzers for measuring time, frequency, and phase; counter analyzers, namely, electronic analyzers for measuring time, frequency, and phase; air quality analyzers for measuring temperature, velocity, humidity, carbon dioxide, carbon monoxide, and airborne particle concentrations; particle analyzers; carbon monoxide analyzers for measuring carbon monoxide levels; temperature devices, namely, temperature indicators, probes, sensors, transmitters, calibrators, and microprocessor-based infrared temperature measurement units comprised of thermometers not for medical purposes and thermocouple probes; thermometers not for medical purposes; thermometer probes for non-medical use; laboratory equipment, namely, temperature fluid baths; humidity meters; timers; time counters, namely, electronic tools for measuring time intervals, time rise and fall, time periods, duty factor, frequency, pulse width, count totalization, and phase; ratio counters, namely, electronic tools for measuring frequency ratios, voltage ratios, infrared ratios, calibration test ratios, temperature ratios, and resistance ratios; frequency counters; frequency burst counters; voltage counters, namely, tools to count voltage, continuity, and current; rise and fall time counters; electronic data loggers, namely, data acquisition instruments for collecting, storing, monitoring, and analyzing equipment performance data comprised of hardware, software, and portable and/or networked data logging acquisition units; measuring apparatus, namely, clamp meters for measuring electricity; electric current probes; current clamps, namely, electrical current clamps for testing and measuring electricity, currents, and voltage; process calibrators; air quality measurement instruments, namely, electronic monitors for measuring temperature, velocity, humidity, carbon monoxide, carbon dioxide, air velocity, air flow, air pressure, and differential pressure; air quality particulate measurement instruments, namely, particle counters and electronic particle source locators; electronic based instruments for measuring temperature and humidity levels; phase rotation meters; infrared and thermal imagers not for medical use; infrared temperature measurement instruments, namely, temperature sensors; copper cable testers and analyzers; fiber cable testers and analyzers; wireless network analyzers; biomedical test instrumentation and software, namely, automated biomedical equipment test systems comprised of hardware, software, and data recorders for monitoring and inspecting the performance and electrical safety of biomedical equipment; medical testing equipment, namely, blood pressure simulators and patient simulators for use in testing medical equipment; electronic pressure monitors, namely, atmospheric or barometric pressure monitors; thermo-hygrometers; ultrasound watt meters; electronic gas flow analyzer, namely, hardware and software for analyzing gas flow in ventilators; clinical laboratory testing equipment, namely, test lungs used to test functionality of ventilator equipment; clamp meter accessories, namely, electrical testing leads, electrical current probes, rogowski based current probes, inductive current probes, Hall effect current probes, and electrical connectors in the nature of crocodile, alligator, bus bar, and piercing test clips, sold separately or as a unit with clamp meters for measuring electricity; computer hardware for the foregoing goods, specifically excluding computer network routers or Ethernet hubs; computer peripherals; specially adapted cases for the foregoing goods; mounting racks for the foregoing goods; all of the foregoing goods sold separately or in various combinations