Sensors

Meteorological Equipment

The meteorological components comprise the following: RM Young 9106 optical wind monitor; RM Young air temperature/relative humidity and radiation shield; LI-COR solar radiation LI-200SA sensor; RM Young barometric pressure sensor; RM Young rain gauge; and an IWS wave height and direction sensor. http://www.youngusa.com/


Temperature and Relative Humidity:
The Young model 41382VC Relative Humidity/Temperature Probe housed within a Multi-Plate Radiation Shield (model 41003P) will be deployed on each buoy. The probe operates within a temperature range of -50 to 50C and a relative humidity range (0 to 100%) well within expected norms and extremes. The temperature accuracy is within + 0.1oC, while the relative humidity accuracy is within + 1%.


Barometric Pressure:
The Young (model 61302) Barometric Pressure Sensor will be deployed on each buoy. The pressure sensor will be installed within a weatherproof enclosure (model 61360) and a pressure port (model 61002) that helps minimize dynamic pressure errors due to wind. The pressure sensor operates with a temperature (-40 to 60C) and pressure range (500 to 1100hPa) well within expected norms and extremes. The instrument resolution is within 0.01 hPa. Digital accuracy is within 0.2 hPa (calibrated at 25C), and 0.3 hPa over the full temperature operational range. The pressure sensor is calibrated to a NIST traceable pressure reference.


Wind Speed and Direction:
The Young (model 04106) wind monitor will be deployed on each buoy. The wind monitor measures horizontal wind speed and direction. It is rugged and corrosion resistant as it was originally developed for ocean data buoy use. The wind monitor has an operating temperature (-50 to 50C) and wind speed range (0 to 100 m/s) that are well within expected norms and extremes. The wind monitor is fully calibrated (NIST traceable wind tunnel calibration).


Precipitation:
The Young (model 50203) precipitation gage will be deployed on each buoy. Durable thermoplastic construction and the lack of moving parts provide corrosion resistance and long term reliability. The gage sensor is unaffected by unsteady conditions, making the gage suitable for buoy deployment. The gage has an operating temperature (-20 to 50oC) well within expected norms and extremes. The gage resolution is 1 mm with an accuracy of + 1 mm.


Solar Radiation:
The LI-COR 200SA Pyronometer Sensor will be deployed on each buoy. The pyranometer is designed for unobstructed daylight conditions and no error is induced from orientation. The operating temperature range (-40 to 65C) and humidity range (0 to 100%) are within expected norms and extremes. The sensor is housed in a weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware. The pyranometer is calibrated against an Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions. Typical error under these conditions is 5%.