Hygrothermograph | Datalogger | Aspirating Psychrometer | Hygrothermometer
Humidity Indicator Cards | Light Meter | UV Meter | Textile Fading Card
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| ASPIRATING PSYCHROMETER | Psychrometers are used to calibrate hygrothermographs. They are equipped with two thermometers, one with a wet bulb and one with a dry bulb. The wet bulb is covered with a wick that must be saturated with distilled water. A battery-operated fan in the aspirating psychrometer draws air over the bulbs. The cooling effect of evaporation produces a lower reading on the wet bulb which is then referred to a slide rule to determine the relative humidity. The dry bulb is simply read from the thermometer. These readings are used to adjust the temperature and relative humidity setting on the hygrothermograph. |
