The HUMICAP® Humidity Sensor was developed in the 1970's, when the possibility of combining thin-film technology and capacitive measurements was studied. Pictured a sensor manufactured in the 1980's.

The Vaisala RS80-radiosonde, which utilizes the HUMICAP® sensor, was launched in the 1980's. The RS80 represents the fourth generation of Vaisala radiosondes.

The DigiCORA ground equipment was introduced in the mid-80's.