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Wind Speed and Direction Sensor
This LDS sensor measures wind speed and direction at an elevation of approximately 2 1/2 meters above the water surface. The sensor has a very low threshold of sensitivity that is required for detecting low wind speeds affecting lake mixing. Wind speed, together with water column stratification are useful in computing the overall stability of the water column.
The 34B is designed to operate within a temperature range of –30 to +70 deg C and with wind speeds up to 167 mph (269 kilometers/hr).
 Met One Instruments, Inc. 034B Wind Sensor. http://www.metone.com/meteorology.htm
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Solar Radiation
The LDS Solar Radiation pyranometer is available in two separate types: the Hoskin Scientific EQ08 and the LI-COR Silicon Pyranometer. These pyranometers are instruments for measuring total down welling solar radiation. The sensor sums radiation arriving from above at all angles. This measurement is useful for determining the amount of solar radiation available at the water surface. |
1) Middleton Solar EQ08
The Middleton EQ08 is a precision pyranometer for the measurement of global solar irradiance on a plane surface and incorporates a precision thermoelectric sensor.
Middleton Solar. EQ08 Solar Pyranometer. http://www.middletonsolar.com/products/product4.htm |
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2) LI-COR Silicon Pyranometer
The LI-COR Silicon Pyranometer with Fixed Multiplier measures sun plus sky radiation, waveband: 400 to 1100 nm, and uses a silicon photovoltaic detector. It is calibrated against an Eppley precision Spectral Pyranometer (PSP) to accurately measure sun plus sky radiation.
Campbell Scientific, Inc. LI200X-L Pyranometer. http://www.campbellsci.ca/Catalogue/LI200X.html
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Net Radiation
This sensor (actually consisting of two sensors, one facing upwards, one facing downwards) measures the net radiation in the 300 nano-meter to 60 micro-meter band. This measurement is useful in determining the heat flux into or out of the water surface. |
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Features Include: fast-response thermopile sensor, balanced short wave and long wave sensitivity, balanced upward and downward sensitivity, bubble level on head, semi-rigid domes stay inflated, desiccated and sealed, and durable cast epoxy head, painted in white polyurethane.
Middleton Solar, CN1-R Net Pyrradiometer. http://www.middletonsolar.com/products/product7.htm
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Relative Humidity and Air Temperature Sensor
This sensor measures the relative humidity and air temperature at an elevation of approximately 2 1/2 meters above the water surface. This measurement is useful in computing the sensible and latent heat fluxes at the water surface.
Vaisala, Inc. HMP45A with 3.5m cable, http://www.vaisala.com |
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