Description
Wall-mounted Mason's hygrometer with two identical dual-scale thermometers — one dry and one kept wet via a water reservoir — calculating relative humidity from their paired reading difference
Vertical 1
5-capacitor condenser box features capacitors from 1 to 4
625 inches in diameter
Small Student Anemometer Meters_Electrical Wall-mounted Mason's hygrometer with twoCorrosion resistant and sized for hand held use, this small anemometer measures wind speed during earth science fieldwork and classroom weather investigations.
Exchange/Return Notes
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