Apparatus for testing gas, liquids and solids; optical sensors; sensors for measurement purposes, other than for medical use, namely, sensors for measuring distance, chemical levels in aqueous solutions, not for medical use; non-contact measuring apparatus for measuring distance and liquid levels, namely, distance measuring apparatus and liquid level sensors; water quality meters, namely, electronic-based instruments for measuring water quality; water quality measuring apparatus, namely, scientific water quality measurement instrumentation for measuring chemical levels in water; apparatus and instruments for measuring and analyzing water quality, namely, electronic-based instruments for measuring water quality, scientific instrumentation for measuring concentrations of chemicals in water, sensors for measuring concentrations of chemicals in water, water testing instrumentation for monitoring and detecting contamination; liquid detecting sensors for detecting the presence of liquids, not for medical purposes; precision measuring apparatus for testing hazardous substances, namely, water testing instrumentation for monitoring and detecting contamination; telemetric apparatus and instruments, namely, telemeters; remote control telemetering machines and apparatus; downloadable software for operating water quality, air quality, foreign substances, bacteria measuring devices; recorded and downloadable computer software platforms; downloadable and recorded computer software for data processing; biochip analyzing apparatus, namely, electronic biochip inspection device for inspecting functionality of biochips; inspecting apparatus for semiconductor; testing equipment for semiconductor