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The ordinary thermodynamic temperature of the air, what you would measure with a regular thermometer. This is in contrast to the wet bulb temperature, which is the temperature reached by a wet surface. A classical weather station uses a sling hygrometer to measure the two. This is a pair of thermometers, one of which has a wet covering, something like a sock that can be dipped in water. By measuring both of these the humidity can be determined. Temperature of the free air as measured with a dry thermometer on a sling psychrometer over a grassy surface at a height of approximately 6 feet (1.8 meters).
Wiki User
∙ 14y ago
Wiki User
∙ 8y agoWet bulb temperature is the temperature that you get when you put a wet sock over a standard thermometer and blow air over it. It's a customary approximation for the adiabatic saturation temperature, the temperature that the air would reach if you evaporated water into it until it was saturated without exchanging heat with the surroundings.
The wet-bulb temperature is the temperature a parcel of air would have if it were cooled to saturation (100% relative humidity) by the evaporation of water into it, with the latent heat being supplied by the parcel.
Wiki User
∙ 14y agoThe dry-bulb temperature is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture. Dry bulb temperature is the temperature that we usually think of as air temperature. It is the temperature measured by a regular thermometer exposed to the airstream. Unlike wet bulb temperature, dry bulb temperature does not indicate the amount of moisture in the air. In construction, it is an important consideration when designing a building for a certain climate. Nall called it one of "the most important climate variables for human comfort and building energy efficiency."
http://en.wikipedia.org/wiki/Dry-bulb_temperature
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What is the superheat?
17 to 20 degrees is normal.you should always check dry bulb at return air and outside temp to determine the correct reading
Is the wet bulb thermometer reading always higher than a dry bulb reading?
No, the wet bulb is always lower. Evaporation from the wet bulb reduces its temperature.
Can you control inside temperature of bulb when it is glowing.?
I hope temp inside the bulb can be control by varying the input voltage and monitoring it be Infra red thermometer. But it may possible that illumination of bulb get affected.
What is the relative humidity of a room having a dry bulb 72 degrees F and a wet bulb temperature of 59 degrees F?
answer is
How do you use hygrometers?
Fill the water bottle and screw it on to the instrument. Then hang the hygrometer (by the loop at the top) on a wall or a tree, for instance, for at least five to 10 minutes before taking the measurements. Ideally the instrument should be in a well-shaded spot or in a Stevenson screen (refer to "Making your own weather station" in Section 4: Contacts and further information). The instrument contains two alcohol-in-glass thermometers with a scale of minus 10 to plus 110 degrees Celsius, in 1 degree increments. The end of the 'wet-bulb' thermometer is covered with a damp cloth dipped in water. The other thermometer is the 'dry-bulb'. 6 Record the wet-bulb and dry-bulb temperatures. 6 Calculate the wet-bulb depression - the dry-bulb temperature minus the wet-bulb temperature. 6 Determine the relative humidity (%) using the table (reverse page). Read down from the wetbulb depression and across from the dry-bulb temperature. do's and don'ts Be careful with the instrument. The thermometers are made of glass and can easily break. Empty the water bottle before returning the hygrometer to its box. how it works The hygrometer works on a similar principle to the whirling psychrometer. The main difference is that the hygrometer is not rotated, so evaporation from the damp cloth around the wet-bulb thermometer occurs more slowly.
What is physcometer?
it is an instument which used to measure the dry balb temp. and wet bulb temp. of air.
On metar report wbd 0.9 what does it mean?
Wet Bulb Depression. The difference between the dry- and wet-bulb temperatures. Used when temp and dew point are close together.
On a cold winter day the air temperature is 2C and the wet-bulb temperature is -1C What is the relative humidity at this location?
51%.... open to the Relative Humidity chart in the reference tables. the wet bulb temperature is -1C and the dry bulb temp. is 2C, making a difference of 3C. On RH chart, go down to 3C column (difference between the Wet bulb and dry bulb) until it intersects the dry bulb 2C. At this intersection is 51%
What is the superheat?
17 to 20 degrees is normal.you should always check dry bulb at return air and outside temp to determine the correct reading
What is the ideal superheat?
17 to 20 degrees is normal.you should always check dry bulb at return air and outside temp to determine the correct reading
What is the maximum temp for room temp for dry storage?
135
What does a wet bulb and a dry bulb measure?
A wet bulb measures the temperature after water evaporation allows to cool and a dry bulb measures air temperature.
What is the dew-point when the dry bulb temperature is 20C and the relative humidity is 17?
at 17% relative humidity the dew point is -5.8C at a dry bulb of 20C
What main parts are to make a psychrometer?
The two parts of a psychrometer is the dry-bulb thermometer and the wet-bulb thermometer.
What is the dew point when the dry bulb temperature is 14C and the dry bulb temperature is 8C?
-9c
What is an example of thermostat?
On a car, it is in a housing. On 1 end there is a spring with a bulb, and the other end is the round closing plate. With the spring and temp bulb in the engine side, as the temp. rises the temp. bulb with the spring will pull the round plate open so that coolant may circulate.
What is the use of dry and wet bulb tenperature?
How you would use a wet-bulb thermoter and a dry-bulb theremometer to fine the relative humidity?
