Vaisala's Weather Transmitter provides accurate and stable measurements
Vaisala introduces an updated version of the weather transmitter, the Vaisala Weather Transmitter WXT520. The WXT520 measures wind speed and direction, liquid precipitation, barometric pressure, temperature and relative humidity all in one instrument. Vaisala's sensor technologies provide accurate and stable measurements. Compact and lightweight, the WXT520 is suitable for weather stations, dense networks, buildings, golf courses, marinas, harbors and hotels, almost anywhere where real-time weather data is needed. To measure wind speed and direction, the WXT520 has the Vaisala Windcap sensor that uses ultrasound to determine horizontal wind speed and direction. Three equally spaced transducers on a horizontal plane ensures accurate wind measurement from any horizontal wind direction without blind angles and corrupted readings. Barometric pressure, temperature and humidity measurements are combined in the PTU module using capacitive measurement for each parameter. It is easy to change the module without any contact with the sensors. Precipitation measurement is based on the Vaisala Raincap sensor. The wind and rain sensors can be equipped with heating, which improves the availability of correct measurement data at all times. Heating also reduces moisture and ice forming on the surface of the tranducers. The heating circuit is independent of the operational power. The WXT520 has an automatic control circuit that switches the heating on at low temperatures, well before the freezing point. Since the WXT520 consumes minimal power, it can use solar panels as an energy source. Not only does this save energy, but it also allows ownes to use the WXT520 in remote areas where electricity is not available. For business or pleasure, owners can measure precipitation with the WXT520. The measurement is based on the unique Vaisala Raincap Sensor, which detects the impact of individual rain drops. The signals exerting from the impacts are proportional to the volume of the drops. Hence, the signal from each drop can be converted directly to the accumulated rainfall. This measurement method allows for the elimination of flooding, clogging, wetting and evaporation losses in rain measurement. Compared to traditional precipitation gauges, the Vaisala Raincap Sensor gives more detailed information on precipitation. The WXT520 measures accumulated rainfall, rain intensity and duration of the rain, all in real time. The Vaisala Raincap Sensor is the only maintenance-free precipitation sensor on the market. The WXT520 is delivered preconfigured from the factory. To change the factory settings, owners can use the Vaisala Cofiguration Tool based on Microsoft Windows. The WXT520 is easy to install with its one-bolt mounting method. The WXT520 can be mounted either on top of a pole mast or on to a cross arm. For facilitating the installation to the pole mast and eliminating the risk of misalignment during use, an optional mounting kit is available. With the mounting kit the north alignment needs to be performed only once. The WXT520 housing with the mounting kit is water resistant and classified as IP66.