Recommended Articles. More Articles. Sling Psychrometer Principle. Send this to a friend. Send Cancel. A sling psychrometer can be used to determine the physical and thermal properties of moist air by using standard tables and charts. Typically it is used to determine relative humidity. Some sling psychrometers include mechanisms to allow relative humidity to be read directly without needing to refer to tables.
Keeping the sling psychrometer clean is important for accurate measurements. Wipe the thermometers with vinegar to remove any dirt or any stubborn mineral deposits. Fuel Moisture Definition Fuel moisture content is the amount of water in a fuel, expressed as a percent of the oven dry weight of that fuel. Fuels can be weighed before and after drying in an oven. Fuel moisture percent is determined by dividing the difference between the wet and dry weights by the dry weight.
Whirl the instrument rapidly for at least one minute, but no more than three. The dry bulb thermometer simply reads the tempera- ture of the surrounding air. However, as the wet bulb passes through the air, water evapo- rates from the wick causing the wet bulb thermometer to read a lower temperature than the dry bulb.
The resulting number indicates relative humidity. Heat Syncope: this is a feeling of light headedness or fainting during or after exercise in excessive humid conditions.
Make sure that both thermometers are secured on the dowel and swing them around for one minute. Things You'll Need. How to Find Relative Humidity. What Is a Wet Bulb Thermometer? Measuring Wet Bulb Temperature. Percentage of Water Vapor in the Atmosphere. How to Understand Barometric Pressure Readings.
How to Calculate Grains of Moisture. How to Build a Hygrometer. Types of Hygrometers. How to Make a Galilean Thermometer.
Types of Old-Fashioned Weather Instruments. Viewing Evaporation Experiment for Kids.
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