Wet Bulb and Dry Bulb Thermometers

Sling Psychrometer

I needed suitable liquid filled thermometers to set up a fixed station wet bulb/dry bulb psychrometer. I searched the usual eBay sources and came up empty. I finally located a new-in-box sling psychrometer in the listings, so I purchased that and planned on using the thermometers for my fixed-station setup. Continue reading

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Preparing the station for colder weather

Davis weather station

It has been forecast that my area will have bitter cold temperatures for a few days next week. Now is the time to do a bit of prep work to make sure that the station stays online and provides useful data.

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Davis Temperature and Humidity Sensor Sensitivity.

KI5OMM Weather Station

I’ve replaced the Temp/Hum sensor several times over the years as they seem to last about 3 or 4 years before they start showing signs of inaccuracy. The current sensor that I am using now is a Sensiron SHT31 that I purchased from Scaled Instruments in Fl. Continue reading

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Building a Fan Aspiration Unit

Fan Aspirated Shield

One thing about the Cotton Region Shelter design is that it’s made of wood. Even though it is painted white, it still has a lot of thermal mass on the outside and it tends to unevenly heat the interior, especially on very hot and still days. I built a solar powered fan aspirator to hopefully even out the temperature spikes seen on the daily graphs during the hottest part of the day. Here is how I constructed it. Continue reading

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