Alcoholmeters; Refractometers; Antifreeze testers; Apparatus for testing gas, liquids and solids; Diagnostic apparatus for identifying refrigerant type and purity in automobile air conditioning systems; Electronic apparatus for use in the treatment of aqueous systems, namely, for analysis of the system conditions for the purpose of applying the appropriate chemical treatment; Fiber optic instruments, namely, transceivers; Instruments for measuring milk quality parameters; LED microscopes; Liquid analyzers; Magnifying glasses; Monitors used in food manufacturing to determine levels of glucose, gluten, allergens, bacteria; Non-medical imaging devices for gemstones, roots; Optical inspection apparatus for industrial use; Pet collar accessories, namely, signaling bells; pH meters; Portable detection and identification instruments using light sources and light detectors for detecting and identifying chemical and biological substances not for medical purposes; Research laboratory analyzers for measuring, testing and analyzing blood and other bodily fluids; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Urinometers, not for medical purposes; USB cables