The Vaisala is our recommended unit
for automated monitoring because of its versaltility and use of non moving parts.
The Vaisala Weather Transmitter WXT520 measures barometric pressure, humidity, precipitation, temperature, and wind speed and direction. To measure wind speed and direction, the WXT520 has 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 is a Vaisala specific design. 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.
The WXT520 is immune to flooding clogging, wetting, and evaporation losses in the rain measurement