An instrument for measuring the relative humidity by means of an air flow across two thermometers, one of which (the "wet" bulb) is covered by a moistened wick. Often used to help with calibration of hygrothermographs and as an independent check of relative humidity.

Instrument that determines relative humidity. Wet and dry bulb temperature readings are compared with an RH chart.

Instrument consisting of a wet-bulb and a dry-bulb thermometer and used to measure the water vapor content of the air.

See thermo-hygrometer.

An instrument that uses the difference in readings between two thermometers, one having a wet bulb and the other having a dry bulb, to measure the moisture content or relative humidity of air.

An instrument used to measure the water vapor content of the air. It measures the dry-bulb and wet-bulb temperatures and with the air of tables, relative humidity and ew-point can be found.

an instrument for measuring the amount of water vapor in the atmosphere.

a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air

a device used to determine atmospheric humidity by reading the wet bulb and dry bulb temperatures

an instrument used to obtain dew point and relative humidity

a valuable instrument for evaluating the conditions inside a cold storage room

a thermometer-like instrument for measuring wet bulb and dry bulb temperatures simultaneously

Any instrument used to measure the water vapor content of an air parcel (atmospheric humidity) by evaporative cooling of the air to its wet bulb temperature. Examples include a sling and an aspirated psychrometer. The psychrometer consists of two liquid-in-glass thermometers, one of which ( dry-bulb) measures the ambient air temperature. The bulb of the other thermometer ( wet-bulb) is covered with a muslin sock which is saturated with distilled water prior to an observation. When ventilated, the instrument indicates the dry-bulb and wet-bulb temperature Dewpoint and relative humidity can be determined from the wet bulb depression using a psychrometric table. See also hygrometer.

A device used to measure Relative Humidity and Dew Point.

An instrument for deter mining wet-bulb temperature. The form most generally used, called the sling psychrometer, has a wet-bulb and a dry-bulb thermometer attached to a small support. By means of a handle or chain, the device can be swung around rapidly. The strong current of air thus caused evaporates the moisture in the sleeve of the wet-bulb thermometer, whereby the wet-bulb temperature is indicated.

tool with two thermometers used to find humidity

An instrument used for measuring relative humidity. The simplest sling psychrometers consist of two thermometers mounted on a rotating frame. One thermometer's bulb is kept moist, the other dry. By comparing the "wet bulb" and "dry bulb" readings of the two thermometers after they have been whirled in the air, one can determine the relative humidity. An electric fan is used to ventilate the wet bulb in many psychrometers. See also Hygrometer.

A hygrometer for measuring water vapor in the atmosphere.

An instrument used to measure relative humidity by comparison between a wet-bulb thermometer and a dry-bulb thermometer.

An instrument for determining relative humidity.

a device for measuring ambient humidity by employing a dry bulb thermometer and a wet bulb thermometer.

An apparatus used to determine the relative humidity by determining the wet bulb temperature of the air. It is a very accurate means of determining relative humidity.

An instrument used to measure the water vapor content of the air. It consists of two thermometer (dry bulb and wet bulb). After whirling the instrument, the dew point and relative humidity can be obtained with the aid of tables.

An instrument used primarily to measure the wet-bulb temperatures. Either a sling or a mechanically aspirated type of psychrometer is acceptable provided the instrument is properly shielded from radiation and the air across the wick is limited to approximately 1,000 ft/min.

An instrument that measures relative humidity of the air.

An instrument used to measure the water vapor content of the air. A type of hygrometer. It consists of a wet-bulb and a dry-bulb thermometer. See aspiration psychrometer, Assmann psychrometer, hygrodeik, sling psychrometer.

a device used to measure web bulb temperature.

A simple instrument used to measure temperature and relative humidity Sling psychrometer's are relatively inexpensive to purchase compared to a thermohygrograph, but are very accurate when used properly.

an instrument that measures the water vapor content of the atmosphere. It consists of a wet and dry bulb thermometer

A pair of matched thermometers mounted together, consisting of a dry bulb measuring ambient air temperature and a wet bulb (covered with muslin kept moist by a supply of distilled water). From the difference between the two, one may calculate humidity and dew point. Special tables or a humidity slide rule are used.

Instrument used to measure atmospheric humidity. It consists of two thermometers ( wet-bulb and a dry-bulb) one of which has its bulb covered by a moistened wick. Humidity is determined by the difference in readings between the two thermometers after air has passed over both of them for a specific time period.

An instrument for measuring relative humidity by means of wet and dry-bulb temperatures.

An instrument used to measure water vapor content of the atmosphere. It consists of two thermometers wet bulb and dry bulb. May also be referred to as a sling psychrometer.

The general name for instruments designed to determine the moisture content of air. A psychrometer consists of dry-and wet-bulb thermometers that give the Dry-and Wet-bulb Temperatures, which in turn are used to determine Relative Humidity and Dew Point.

An instrument used to measure humidity. It consists of two thermometers exposed side by side, one of which (the dry bulb) is an ordinary glass thermometer, while the other (the wet bulb) has its bulb covered with a jacket of clean muslin that is saturated with distilled water prior to an observation. The temperature measured by the wet-bulb thermometer is generally lower (due to evaporation of water from the wet bulb) than that measured by the dry bulb. The difference in the temperatures is a measure of the humidity of the air; the lower the ambient humidity, the greater the rate of evaporation and, consequently, the greater the depression of the wet-bulb temperature. The size of the wet-bulb depression is related to the ambient humidity by the psychrometric formula. See aspiration psychrometer, Assmann psychrometer, sling psychrometer.

an instrument used for measuring the water vapor content of the atmosphere; a type of hygrometer; it consists of two thermometers, one of which (the dry bulb) is an ordinary glass thermometer, while the other (wet bulb) has its bulb covered with a jacket of clean muslin which is saturated with distilled water prior to an observation; when the bulbs are suitably ventilated, they indicate the thermodynamic wet- and dry-bulb temperatures of the atmosphere; one variety is the assman psychrometer (a special form of aspiration psychrometer for which the ventilation is provided by a suction fan).