||A temperature and relative humidity probe designed to provide highly accurate and stable measurements in air. The STH-S331 temperature and relative humidity sensor is normally connected to METEODATA/HYDRODATA 2000/3000 data acquisition systems. The two sensing elements (Temperature and Relative Humidity) come up bound to a nylon plastic casing, which, on the one hand, allows an easy installation thanks to its direct coupling to solar radiation shields both with natural and forced cooling and, on the other hand, makes easier the connection to the measuring and/or acquisition system using a single 7-pin IP66 connector. The factory default temperature measurement range is -40 to +60 degrees Celsius, with an accuracy of +/-0.1 degrees Celsius and resolution of 0.01 degree Celsius; Other ranges are available. The relative humidity measurement range: 0-100% RH. The maximum humidity at the sensor is 100% RH up to 80 degrees Celsius, 75% RH at 100 degrees Celsius, 45% RH at 125 degrees Celsius, and 15% RH at 150 degrees Celsius. The accuracy of the relative humidity sensor is +/-0.8% RH at 23 degrees Celsius, and 3.3 VDC (volts of direct current), and its resolution is 0.1%.