Automatic fluid-composition control machines and instruments; Automatic liquid-flow control machines and instruments; Automatic liquid-level control machines and instruments; Automatic pressure control machines and instruments; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Instruments for detecting and measuring two-dimensional distribution of force and pressure; Measuring instrumentation and apparatus, namely, digitizers; Portable detection and identification instruments using light sources and light detectors for detecting and identifying chemical and biological substances not for medical purposes; Precision instruments for manipulation and positioning of microscopic objects; Radiation-measuring instruments; Resistance measuring instruments; Scientific measuring instruments, namely, conductivity meters; Electric or electronic sensors for sensing of chemical substances, biological molecules, nano particles, electromagnetic and nuclear radiation for use in the fields of homeland security, environmental monitoring, drug discovery and military; Electric, electronic, or electrochemical oxygen monitors and sensors for environmental use; Electronic data relays for sensors; Electronic plant moisture sensor; Electronical sensors for measuring solar radiation; Gas sensors for measuring gas concentration; Hand-held device comprised of chemical and heat sensors for the detection of explosives; Pollutant sensors; Sensor activated fire extinguisher for use in clothing dryers; Sensors and detector units for use in controlling the actuation and operation of automotive safety apparatus and equipment; Sensors for the determination of temperatures, positions and distances