Renewable Energy Systems are designed to take benefit of the outdoor natural conditions. Their efficiency and long life depend on them (air flow, air velocity, solar radiation, temperature etc.). Continuous monitoring of outdoor natural qualities is essential for optimizing operation, preventing small and large scale damages and adapting design according local conditions. Common requirement for such applications is saving data for a long period of time and/or the ability to send them on line. This is why most of the instrumentation presented in this chapter is based on transducers: Flow transducers, temperature transducers, solar radiation transducers, humidity transducers, etc.
Keywords: Hot Wire Anemometer, Hygrometer, Magnetic Flowmeter, Nozzle Meter, Orifice Meter, Pitot Tube, Pyranometer, Pyrheliometer, Psychrometer, Rotameter, Resistance Temperature Detector, Turbine Flowmeters, Thermistor, Thermocouple, Venturi Meter, Vortex Shedding Flowmeter.