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Rotronic

Home / Our Brands / Rotronic / HygroClip Probes / Meteorological Probes / Weather Shields / Actively Ventilated Shields

Actively Ventilated Shields

The ventilated weather and radiation shields RS12T with 12 VDC fans and RS24T with 24 VDC fans were developed in close cooperation with MeteoSwiss, the Swiss National Meteorological Organisation. The instruments reduce the influence of thermal radiation on the measurements of temperature and humidity to a minimum and represent state-of-the art technology. The shield also offers optimum protection in stormy weather, even against horizontally driven rain and snow. The values measured by the combination of the weather shields and a ROTRONIC meteorological probe are practically identical to the ones measured by much more expensive dew point mirrors used as reference instruments by many meteorological organisations. The fan is supplied by a separate cable. Compared to former products, the new shield offers a remarkably increased accuracy of measurement. All ROTRONIC Meteorology-probes may be used with the new shield.

Apart from the different fan and its supply voltage, RS12T and RS24T are absolutely identical. The shields offer protection against precipitation and radiation. This means that the temperature- and humidity values are almost 100% identical with the effective conditions. This is achieved by a divided flow of air: the main stream intersects the probe rectangular, which means an optimal incoming flow. The shield features two shells, which are mounted one over the other. The air between these shells is constantly exchanged, and hence the temperature inside the measuring tube is equal to the prevailing conditions. The shield and mounting arms are two separate units. While the shield ist he same for all probes, (except fan and voltage), the mounting arms allow the use of all different ROTRONIC meteorology- probes.

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Omni Instruments Ltd,
Unit 1, 14 Nobel Road,
Wester Gourdie Industrial Estate,
Dundee, DD2 4UH, UK

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