Thermometer Casella CEL

This simple instrument allows accurate measurement of air velocities and the cooling power of the air. Each thermometer has a stem with just two graduations corresponding to a drop of 3°C. The thermometer is heated and then allowed to cool, noting the cooling time. The air velocity is calculated using a formula and a resulting heat loss per unit surface area can be determined. The cooling thermometer is alcohol filled with a plain or silvered bulb. Silvered bulb patterns are used to overcome heat radiation from surrounding surfaces

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