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, fiber optic patch cords, optically isolated USB and serial cables, 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; constant temperature calibration baths in the nature of metrology baths; Metrology dry-wells; furnaces for laboratory use, hygrometers, oscilloscopes, oscilloscope software for storing, retrieving, analyzing, and printing waveforms, measurement data, and harmonics; 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 and digital readout units; thermometer calibrators, temperature and humidity meters not for medical use; Apparatus and instruments for calibrating and measuring the accuracy of the calibration of other apparatus and instruments, namely, industrial calibration sensors, dry-block calibrators; electrical measuring and testing devices with electrical standards settings, namely, voltmeters, ammeters, and ohmmeters; portable oscilloscope devices, namely, integrated oscilloscope, multimeter, and paperless recording devices 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, rack mounts, voltmeter probes, oscilloscope probes, clips, cases, and 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; barometers; pressure calibrators; gage pressure modules; Pressure pumps for testing purposes, namely, hand operated pressure pumps, hydraulic pressure pumps and pneumatic pressure pumps; medical diagnostic simulators, namely, oxygen saturation simulators for testing pulse oximeters; surveying instruments; electrical testers, namely, voltage testers, electrical ground testers; electrical insulation testers; multimeters; digital multimeters; calibrators; Calibration software for automated calibration for use in calibration of test equipment, calibration management, calibration data, reporting, and analysis, calibration database creation, reporting, and management, calibration measuring and testing, calibration auditing, calibration asset management and reporting, translating computer procedure file formats, and writing computer procedure files; 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, defibrillators, transcutaneous paces and intravenous pumps; 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; Incubator analyzers, namely, electronic analyzers for measuring incubator temperatures, humidity, sounds and airflow; Electronic nuclear medicine channel analyzers, namely, analyzers for measuring radiation levels not for medical use; Multi channel infusion analyzers for testing of infusion equipment; Electrosurgical analyzers for detecting and analyzing electricity, load, frequency and leaks in electrosurgical units; 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; [Network analyzers for testing Asynchronous Transfer Mode (ATM), Digital Signal Level 3 (DS3), European Digital Signal Level 3 (E3) and/or fiber distributed data interface (FDDI) networks and equipment;] Frequency standard devices, namely, oscillators used for frequency calibration; temperature devices, namely, temperature indicators, probes, sensors, transmitters, calibrators, and microprocessor-based infrared temperature measurement units comprised of thermometers and thermocouple probes; thermometers; 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; Pulse width counters, namely, instruments used to test and measure the exposure time of x-rays; 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; Clamp meters; 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; thermal imagers not for medical use and parts and accessories thereto; Handheld and desktop computer hardware and software for testing, analyzing, mapping, and reporting on the performance and quality of local area network (LAN), wide area network (WAN), and virtual private network (VPN) network connections and enterprise networks; [Computer hardware and software for analyzing the capacity and expansion of computer local area networks (LAN);] Electrical recording, testing and measuring instruments, namely, network analyzers; electronic circuit boards, acoustic meters, and cable connectors for use with computer local and global area networks and other cabling systems; Integrated network maintenance instrument designed for use in installing and maintaining local area wired and wireless networks, namely, a network analyzer; [Computer software for monitoring and analyzing hardware and software problems that occur within computer networks, computer systems and software applications;] Copper cable testers and analyzers; fiber cable testers and analyzers; wireless network analyzers; [Telecommunication instruments, hardware, and software, namely, telecommunication adapters;] Telecommunications line testing instruments and troubleshooting devices, namely, telecommunications hardware and software; telecommunications test sets, namely, apparatus for use by communications service providers to test voice and/or data signals transmitted by telephone lines; 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 lung