Windsond now has the option for a sensor with especially high guaranteed accuracy and resolution. By placing the sensor 10 cm out on a light-weight boom, the risk of the sonde affecting the temperature and humidity measurements is minimized.
The sensor is Sensirion SHT25, with 1.8% accuracy and 0.04% resolution of relative humidity. Temperature has a typical accuracy of 0.2 degrees C and resolution of 0.01 degrees C.
The high-accuracy sensor is available as an option for all new sondes.