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When you value accurate rainfall measurements.  You need a precipitation sensor manufactured in the UK by EML.



Robust, quality Wind Sensors also manufactured in the UK by EML.



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A Heated Aerodynamic Precipitation Gauge

A White Paper by EML delivered at the WMO event 'TECO 2008' in St. Petersburg

A Heated Aerodynamic Precipitation Gauge

UPG1000 at Rothera, Antarctica

A Heated Aerodynamic Precipitation Gauge

Solid precipitation is the most difficult type of precipitation to measure. Rainfall measurement errors are dominated by the aerodynamic loss of drops due to the speeding up of the wind over the gauge but this problem is much greater with snow. The best exposure for a rain gauge is with its orifice at ground level, but in the many situations where this is not practicable an aerodynamically-shaped gauge is the best alternative. Such a gauge was developed in a joint collaborative project between TerraData Ltd and Environmental Measurements Ltd. As an extension of this work, the rain collector has now been equipped with accurately controlled electrical funnel and chamber heating to enable it to melt falling solid precipitation. Rain, or melted snow, is measured by a tipping bucket in 0.1mm steps, giving a good resolution of intensity as well as total fall. It is considered that this approach to precipitation measurement is preferable to the use of antifreeze and weighing mechanisms, for reasons that will be explained. Gauges have now been tested in the Scottish Highlands and the Antarctic. The design and performance of the gauge, as well as the test results will be discussed and illustrated.


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