A black plate temperature sensor is often used as part of the weather station with retractable roof control. Since the sunlight has an heating effect on the sensor and the wind speed has a cooling effect of the sensor, it can give an indication of the amount of stress on the plants and can be used to determine whether to start shading the plants from the effect of the combination of temperature and solar radiation.
The black plate temperature sensor is not sold by Priva but you can build one yourself. It consists of a black plate, a Priva temperature sensor, a mounting profile and some fasteners. This article contains a link where you can download a manual that describes the construction and installation of the black plate temperature sensor.