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Temperature inside a weather station enclosure
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[QUOTE="GhostLoveScore, post: 6616064, member: 474408"] Hello I have a digital thermometer that I put into a wooden enclosure. It has horizontal holes drilled into its sides all around to let air in. On the bottom there is an opening around 1/3 of the width, like in attached photo. [ATTACH type="full" alt="weather1.png"]299097[/ATTACH] And I was thinking about certain thing. When I put a bare thermometer circuit board in the middle of the enclosure, like on the left side of the attached image, I get certain values. But sometimes sunlight can get through the holes (at sunset) so I decided to put a PVC square pipe around the sensor. Sensor is attached inside the pipe with two plastic spacers and it's exactly in the middle of the pipe. It doesn't have top and bottom sides. It hangs from the wire in both cases (with or without PVC pipe) from the top of the wooden enclosure. I noticed that my temperatures are about 0.3 to 0.5 degrees higher with PVC pipe around the sensor than without it. At first I thought that maybe light is getting reflected like in second attached photo, [ATTACH type="full" alt="weather2.png"]299098[/ATTACH] so I taped the inside with black tape. Still same thing. Then I though that maybe PVC pipe is warmed up with my hands and with sunlight before I put it inside, but that seemed to be wrong when I stored the PVC pipe inside the wooden weather enclosure, so it should be the same temperature as the enclosure. So now I'm thinking that maybe ambient air is colder than either wooden enclosure or the PVC pipe, but because PVC pipe is a lot closer to the sensor than wooden enclosure, it could be heating it up those 0.3-0.5 degrees. Any ideas on what's happening here? Maybe I'm naive, but I thought when something is in (not total) shade and you put it in additional shade it should only get colder, closer to being at ambient air temperature, not hotter. [/QUOTE]
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Temperature inside a weather station enclosure
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