9 Calibration devices for calibrating pyranometers, reference cells, temperature, and humidity.; Circuit boards; Computer interface boards; Computer software for application and database integration; Computer software for creating searchable databases of information and data; Computer-controlled apparatus for testing and measuring pyranometers, reference cells, temperature, and humidity; Data processors; Data synchronization cables; Digital signal processors; [ Distribution amplifiers for audio and video signals; ] Distribution boxes for electrical power; [ Distribution transformers; ] Electric or electronic scientific sensors for sensing environmental factors in the nature of pyranometers, reference cells, temperature and humidity; Electric sensors; [ Electric, electronic, or electrochemical oxygen monitors and sensors for environmental use; ] Electrical circuit boards; [ Electrical conductivity monitor for monitoring how well a solution conducts a current; ] Electrical distribution boxes; Electrical sensor apparatus for sensing the presence or absence of individuals or objects by contact or pressure; Electronic circuit board; Electronic data loggers; Electronic data relays for sensors; [ Electronic magnetostrictive equipment, namely, a wave generator, wave sensor and wave analyzer; ] Environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions; Humidity sensor with integrated digital and analog output circuitry used in automotive, appliance and light industrial applications to sense both relative humidity and temperature environmental conditions; [ Liquid level sensors; ] Micro processors; Multiplexers; Optical sensors; Photovoltaic cells; Photovoltaic cells and modules; Photovoltaic installation apparatus, namely, solar modules for production of electricity, solar thermal and electric receivers, tracking mechanisms and concentrating optics, and control algorithms; Pollutant sensors; Pressure sensors; Programmable controllers and actuators that track the sun enabling concentrating optics to maximize solar energy input; [ Proximity sensors; Sensors for measuring concentrations of chemicals in water; ] Scientific sensors for measuring environmental factors in the nature of pyranometers, reference cells, temperature and humidity, not for medical use; Sensors for the determination of temperatures, positions and distances; Signal processors; System boards (mother cards) and processors; Telecommunications hardware and software for monitoring and alerting remote sensor status via the Internet; Temperature sensors