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Are sun shields available for Outside Air Temperature sensors?

Issue

How to protect an OAT sensor from the sun?

Environment

Outside Air sensors, Outdoor Temperature Sensor

STO100 System Vista, Xenta
STO200 System I/NET
STO500 System Continuum
STO600 System Satchwell
STO600D System Drayton
STO300 Outdoor temperature transmitter

ETO100, ETO200, ETO500, ETO800

Cause

Direct solar heating will affect the outside temperature reading.

Resolution

We do not supply sun shields for an Outside Air Sensors as there should never be a requirement to fit one.
The Outside Air Temperature sensor for a building should always be fitted to the North side of the building where it will not be in direct sunlight (or the South side in the southern hemisphere).

The temperature on the East, South or West sides of any building will always be higher than the North side (in the northern hemisphere) and give inaccurate readings if the sensor is mounted there. Also any sort of sunshade will also act as a shield to retain the heat also giving an erroneously high reading.

For sites like weather stations where the measurements are to be taken in a field installation a Stevenson screen could be used, these are available from specialist instrument suppliers. A web search should provide local suppliers.

Also see Lessons Learned #6339 for further details on sensor location.
 

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Last update:
‎2018-09-06 11:29 AM
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