B-46, IInd Floor, Jhilmil Industrial Area, G.T. Road,
Shahdara,
Near Jhilmil Metro Station,
East Delhi - 110095, India
A Sling Psychrometer is a portable humidity measuring instrument that consists of two mercury-filled thermometers—a dry bulb and a wet bulb. It is used to determine relative humidity by comparing the temperature difference between the two thermometers.
The dry bulb thermometer measures the ambient air temperature, while the wet bulb thermometer has a moistened wick around its bulb. When the psychrometer is swung through the air, evaporation cools the wet bulb. The difference between the two readings is used to calculate relative humidity using a psychrometric chart or humidity table.
Mercury provides stable and highly accurate temperature measurements with excellent repeatability. However, because mercury is hazardous if released, many regions regulate or restrict its use. Always follow local regulations for handling, storage, and disposal.
High-quality mercury-filled models typically provide temperature accuracy of approximately ±0.5°C to ±1°C, depending on calibration and operating conditions.
No. Relative humidity is determined using the wet bulb and dry bulb readings together with a psychrometric chart, humidity table, or calculator.
A psychrometric chart is a reference tool used to calculate relative humidity, dew point, and other air properties from wet bulb and dry bulb temperature readings.
No. It is a fully mechanical instrument and does not require batteries or an external power source.
A Sling Psychrometer (Mercury Filled) offers dependable and accurate humidity measurement without the need for electricity. Its robust mechanical design, portability, and proven measurement method make it a trusted instrument for environmental, industrial, laboratory, and educational applications.
