Instruments and what they measure

Important instruments and what they measure

Instrument	Measurement
Pyranometer	Total incoming radiation
Pyrheliometer	Direct solar beam

irradiance Crescograph Continuous record of plant growth Hygrometer Relative humidity Lysimeter Evapo-transpiration Aerometer Density of gases Piezometer Pressure of ground water Evaporimeter/Atmometer Evaporation Rain guage/Pluviograph Rainfall Hygrograph Continuous measure of humidity Pycnometer Specific gravity of soils Aerometer Density of gases Pyrgeometer Terrestrial radiation Drosometer/Octalis dew guage Dew Barograph Continuous atmospheric pressure Barometer Atmospheric pressure Quantum Sensor Photosynthetically Active Radiation Anemometer Wind velocity Wind vane Wind direction Hair hygrometer Relative humidiy inside room