Thermo-Hygrometer and Radiation Shield

Thermo-Hygrometer and Radiation Shield in use by the St Ives Weather Station in Huntingdonshire & Cambridgeshire

 

Wireless Thermo-Hygrometer

Wireless Thermo-Hygrometer

Oregon Wireless Thermo-Hygrometer used at the St Ives Weather Station

 

Passive Radiation Shield

Passive Radiation Shield

Davies Passive Radiation Shield used at the St Ives Weather Station

 

The Thermo-Hygrometer's operating range is –58°F to 158°F with resolution of 0.2°F; humidity range is 2% to 96%RH with an accuracy resolution of 1%. Updating occurs every 37-seconds. The Thermo-Hygrometer is powered by a solar cell with battery backup. Oregon Instruments do not manufacture a radiation shield for this sensor so I have adapted a Davies Radiation Shield as follows

Radiation Shield Assembly 1

Radiation Shield Assembly 1

Radiation shield assemby begins aligning the fins

 

Radiation Shield Assembly 2

Radiation Shield Assembly 2

Aperture cut in the shield base plates to accommodate sensor

 

Radiation Shield Assembled

Radiation Shield Assembled

Sensors fitted inside the radiation shield

 

Radiation Shield Mounted

Radiation Shield Mounted

Radiation shield and sensors mounted on the weather station mast

 

I trust that this effort will enable the station to record accurate air temperature readings by reducing, or eliminating, the effects of the sun upon the sensor.