Acidity analysers; Analytical apparatus, namely, an automated slide stainer for use in medical laboratories; Automatic inlet control valves for reciprocating air compressors; Centrifugal metering pumps; Control valves for regulating the flow of gases and liquids; Controlled volume pumps; 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; Electronic valves for controlling gas or fluids; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions; Expansion valves for fluid control; Flow cytometers and flow-based analyzers providing cell and particle analysis, detection, or counting for scientific, laboratory, and general research uses; Laboratory instruments, namely, radiation devices in the nature of ultraviolet, visible, or infra-red light boxes for the analysis of bodily fluids; Liquid analyzers; Measuring couplings for measuring temperature, pressure, quantity and concentration of fluids in hydraulic or pneumatic systems; Pneumatic and hydraulic directional control valves for use in automated production machinery; Research laboratory analyzers for measuring, testing and analyzing blood and other bodily fluids; Scientific instruments, namely, electronic analyzers for measuring, testing and detecting contaminants and environmental pollutants; Surveying instruments; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids