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Taylor 5525 Mason Wet Buld Dry Bulb Hygrometer

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Taylor 5525
Mason's Wet Bulb, Dry Bulb Hygrometer

The Taylor 5525 Mason Hygrometer (or Mason's Hygrometer) is actually a wet and dry bulb Fahrenheit thermometer pair that tells you the temperature and relative humidity in your home or virtually any other indoor or sheltered location where the temperature remains above 32°F. The humidity indication is based on the difference between the wet and dry bulb temperatures. On the 5525 is a Relative Humidity Table that cross-references the dry bulb temperature with the degree difference between the wet and dry bulb thermometers to indicate the humidity. The Relative Humidity Table is metal and pivots out from the left side of the 5525's base for access to the glass reservoir that you fill with water before you use the instrument. The 5525 mounts on a wall or other vertical surface by means of a screw, nail, or hook.

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The Taylor 5525 Mason Hygrometer is really a pair of red spirit-filled Fahrenheit thermometers, one a dry bulb and the other a wet bulb. The dry bulb thermometer indicates the actual air temperature. At any dry bulb temperature, the wet bulb thermometer reading can vary, depending on the humidity. High humidity results in wet bulb readings close to dry bulb, while low humidity (which speeds water evaporation and causes cooling) results in wet bulb readings noticeably lower that dry bulb. A table on the 5525 indicates the relative humidity based on the degree difference between the two temperature readings.

The 5525 is easy to use and maintain. Here's all you need to do. Pivot the attached Relative Humidity Table out for access to the glass reservoir. The glass reservoir has a small hole near the bottom for filling and wick insertion. With the unit horizontal, fill the reservoir with water and, with the wick hole up, insert the reservoir into its location between the thermometers. Then insert the wick, hang the unit, and wait for the wet bulb temperature to stabilize. When it does, determine the difference between the wet bulb and dry bulb temperatures (subtract wet from dry), and cross-reference that difference with the dry bulb temperature on the Relative Humidity Table. The cross-reference number is the current relative humidity. (Be sure to refill the reservoir when it becomes necessary.) If there's not much air movement, aiming a fan at the wick can result in a more accurate humidity reading.

The two thermometers on the 5525 are physically identical and easy to read with black numbers on a white background. The thermometer scales read from 10°F to 120°F and are actually graduated from 0°F to 130°F in increments of 2°F. The body of the 5525 is dark gray plastic and is 4 inches wide by 10 inches high.
The Taylor 5525 Mason's Hygrometer is environmentally safe because it is spirit-filled and thus contains no mercury. Like all thermometers, it is not to be mounted in direct sunlight or where there is a great deal of reflected light.

Features:

For use indoors and in sheltered locations above 32°F.

Functionally designed and easy to use and maintain.

Wet and dry bulb thermometers indicate Fahrenheit degrees in easy-to-read black-on-white numbers.

Metal Relative Humidity Table on front of unit cross-references Dry Bulb Temperature with Degrees Difference Between Wet & Dry Bulb to indicate humidity.

Relative Humidity Table pivots outward from thermometer base for access to wet bulb thermometer's water reservoir.

Environmentally safe (red spirit-filled thermometers, no mercury).
No batteries required.

Specifications:

Thermometer measuring range: 0° to +130°F in 2°F increments

Dimensions:
4 inches (102 mm) wide
10 inches (254 mm) high
1-1/8 inches (29 mm) deep

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taylor5525

Regular price: $41.00Sale price: $36.95
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