The Vaisala PTU300 is a combined Pressure, Humidity and Temperature transmitter. The weather transmitter can be equipped with two pressure sensors for verification purposes.
The Vaisala PWD family offers a range of visibility instruments. The PWD uses a optical forward scatter to measure the visibility with a range of 2000 meters for the PWD12 and 20 000 meters in the PWD22. The present weather is available in SYNOP code format.