The ISS consists of the conical black rain gauge mounted above the white louvred radiation shield, which serves to prevent temperature errors due to sunlight falling directly on the temperature sensor. This shield contains the temperature and humidity sensors but, in addition, houses the circuitry for combining the inputs from other outside sensors which are plugged into the mainboard.

The Anemometer measures both the wind speed and the direction and is of the standard 4-cup hemispherical design that has changed little since it was invented in the 15th century.

Made to withstand strong winds but sensitive enough to pick up even the slightest breeze. A Davis Anemometer reported wind speeds of 175mph during Hurricane Andrew before the tower it was mounted on, collapsed!

The Solar Sensort measures solar radiation and is used along with an anemometer and a temperature/humidity sensor, to monitor evapotranspiration.

The diffuser element and housing are carefully designed for accurate cosine response. Silicon photo diode provides good match to solar spectrum. Two-piece housing minimizes radiation heating, allows convection cooling of the sensor, and prevents the trapping of water or dust.

The UV Sensor measures the sunburning portion of the UV spectrum. It allows the console to display UV index, dose rate, and daily and accumulated dose.

The multi-layer filter provides a spectral response that closely matches the Erythema Action Spectrum. Diffuser provides excellent cosine response. Two-piece housing minimizes radiation heating, allows convection cooling of the sensor, and prevents the trapping of water or dust.

Set on the edge of Dartmoor National Park, the ISS is mounted on a 5m alloy pole in the middle of a field with no obstructions in the vacinity. This allows for more accurate measurements and the site currently achieves a 4 star rating on the Met Office's WOW programme.

The site also reports to PWS Weather & Weatherbug.