Vaisala WXT520 Weather Station

With the world becoming increasingly sensitive to weather and climate, it is important to measure the weather accurately and reliably. The WXT520 Weather Transmitter offers the solution to measure barometric pressure, humidity, precipitation, temperature, and wind speed and direction - all with one instrument! 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.

Wind speed and direction measurement utilises the Vaisala WINDCAP® sensor that uses ultrasound to determine horizontal wind speed and direction. The array of 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. 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.

As the power consumption of the WXT520 is very low, it can use solar panels as an energy source. Not only does this save energy, but also allows you to use the WXT520 in remote areas where electricity is not available.

Precipitation 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. 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.

Specifications.

• WindSpeed
• range0 to 60 m/s
• response time 250 ms
• accuracy 0 to 35 m/s ±0.3 m/s or ±3%, whichever is greater
• accuracy 35 m/s to 60 m/s ±5%
• output resolutions and units 0.1 m/s, 0.1km/h, 0.1 mph, 0.1 knots
• Direction
• azimuth 0 to 360°
• response time 250 ms
• accuracy ±3°
• output resolution and unit1°
• Rainfall
• output resolutions and units0.01 mm, 0.001 inches
• accuracy 5%
• Rain intensity
• range0 to 200 mm/h (broader range with reduced accuracy)
• output resolutions and units 0.1 mm/h, 0.01 inches/h
• Hail
• output resolutions and units 0.1 hits/cm2, 0.01 hits/in2, 1 hits
• Hail intensity
• output resolutions and units0.1 hits/cm2h, 1 hits/in2h, 1 hits/h
• Temperature
• Range -52 to +60 °C (-60 to +140 °F)
• Accuracy at +20 °C ±0.3 °C (±0.5 °F)
• Barometric pressure
• Range 600 to 1100 hPa
• Accuracy ±0.5 hPa at 0 to +30 °C (+32 ... +86 °F)
• Output resolutions and units 0.1 hPa, 10 Pa, 0.0001 bar, 0.1 mmHg, 0.01 inHg
• Relative humidity
• Range 0 to 100 %RH
• Accuracy ±3 %RH within 0 ... 90 %RH ±5 %RH within 90 ... 100
• General
• Operating temperature -52 to +60 °C (-60 ... +140 °F)
• Operating voltage 5 to 32 VDC
• Typical power consumption 3 mA at 12 VDC
• Heating voltage 5 to 32 VDC
• Serial data interface SDI-12, RS-232, RS-485, RS-422,
• Weight 650 g (1.43 lb)