The Metos Eco D3 is a compact telemetry unit that runs remotely on solar power with a battery. The unit is typically coupled with a rain gauge and air temperature. Popular add ons include the hygrowclip- Air temp and relative humidity sensor, Leaf wetness sensor, wind speed and wind direction sensors, and soil probe sensors. The station has the potential to connect up to 400 additional sensors, this can all be added on at any time. For Delta-T solutions simply add to the station a wind speed and direction sensor with a hygroclip relative humidity sensor and it will calculate the accurate readings and record it historically for future reference.