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Whirling Hygrometer

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Whirling Hygrometer Specification

Automation Grade
Manual

Humidity
20100% RH

Number of Specimens
2 (Dry-bulb and Wet-bulb thermometers)

Equipment Type
Whirling Hygrometer

Accuracy
1% RH

Response Time
30 seconds to 1 minute

Resolution
0.1C or 1% RH

Display Type
Glass Thermometer (Analog)

Power Supply
Not Required (Non-electrical)

Temperature
-10C to 50C (approx.)

Features
Portable, manual operation, durable, easy to use

Mounting Type
Handheld

Application
Humidity measurement in laboratories, meteorology, fieldwork, HVAC, greenhouses

Measuring Range
0100% Relative Humidity

Test Range
Relative Humidity & Ambient Temperature

Max Height
Approx. 28 cm

Usage
Measurement of humidity and ambient temperature

Machine Weight
Approx. 220 g

Test Speed
Manual Rotation

Control Mode
Manual

Thermometer Length
Approx. 150 mm

Ambient Storage Temperature
-20C to 60C

Cleaning Method
Damp cloth for exterior, gentle cleaning for thermometers

Maintenance
Replace wet bulb wick as required

Body Material
Polished Aluminium or Lightweight Metal

Wet Bulb Reservoir
Cotton sleeve with water reservoir

Accessories Included
Replacement cotton sleeves, instruction manual

Carrying Case
Supplied as standard

Scale Graduation
1C division

Operation Method
Whirling by hand to achieve adequate airflow

Whirling Hygrometer Trade Information

Main Export Market(s)
Asia

About Whirling Hygrometer

By utilizing sophisticated production methods, we are providing the finest quality Whirling Hygrometer. This is ideal for measuring the moisture content in the environment. It is manufactured in tune with set industry standards by utilizing the best grade materials under the observation of our vendors. Further, our quality inspectors examine this Whirling Hygrometer on well-defined parameters to dispatch a quality assured range at users end.

Features:

High in efficiency
Accuracy in result
Unmatched performance

The whirling hygrometer consists of two thermometers mounted on the same frame that can be whirled in the air by hand. The bulb of one thermometer is covered with a tight-fitting muslin sack and wetted with water. This thermometer is known as the wet-bulb thermometer. The other is the dry-bulb thermometer. The psychrometer is whirled to force air past the bulbs. The dry bulb indicates the temperature of the air. The wet bulb helps determine the relative humidity.

In air that has less than 100 per cent relative humidity, the wet bulb will record a lower temperature than the dry bulb. This difference in temperature is known as wet-bulb depression. A special chart is used to convert the wet-bulb depression to relative humidity or the relative humidity can be determined by correlating the readings with those on a simple slide rule, which is supplied with each instrument.

A guide for Relative Humidity (RH) determination is supplied with each instrument and the dewpoint can accurately be calculated using the Elcometer 114 Dewpoint Calculator.

TECHNICAL SPECIFICATION :

Dimensions: 230 x 80 x 28mm
Range: -5C to 50C
Weight: 300g (0.6lb)

Relative Humidity Table

	Accuracy	Range
%RH	2%	1 - 99%
RH Dewpoint	2C	0 - 20C
Dewpoint	6C	>20C

Effortless Humidity and Temperature Monitoring

Engineered for manual operation, this whirling hygrometer delivers precise humidity and temperature readings swiftly and reliably. Its robust build and user-friendly design make it ideal for both indoor and outdoor professional applications, requiring no electrical power for functioning.

Durable, Portable, and Designed for Field Use

Featuring a lightweight yet rugged metal structure, the hygrometer is easy to carry and withstands rigorous field conditions. The inclusion of a standard carrying case and replaceable accessories ensures longevity and convenient transport for on-the-go measurements.

Simple Maintenance and Long-Term Reliability

Routine upkeep requires minimal effortjust wipe the exterior with a damp cloth and occasionally replace the cotton wick on the wet bulb. The included instruction manual ensures all users can maintain optimal performance with ease.

FAQs of Whirling Hygrometer:

Q: How does the Whirling Hygrometer measure humidity and temperature?

A: The hygrometer uses the principle of evaporative cooling by manually whirling two thermometersa dry-bulb and a wet-bulbthrough the air. The temperature difference between the two provides an accurate reading of relative humidity and ambient temperature.

Q: What is the process for using the Whirling Hygrometer?

A: To use, moisten the cotton sleeve over the wet-bulb thermometer, then whirl the instrument by hand at a steady pace for 30 seconds to 1 minute. Observe and record the temperatures on both thermometers and refer to the provided chart to determine humidity levels.

Q: When should I replace the wet bulb wick or cotton sleeve?

A: Replace the cotton wick or sleeve whenever signs of wear, drying out, or residual buildup are noticed, or when the readings appear inconsistent. Extra replacement sleeves are included with the hygrometer for your convenience.

Q: Where can the Whirling Hygrometer be used effectively?

A: It is suitable for diverse applications, including laboratories, meteorological fieldwork, HVAC maintenance, greenhouse monitoring, and educational purposes. Its manual, portable design allows use virtually anywhere, even in locations without electricity.

Q: What benefit does the manual operation provide over electronic models?

A: Manual operation ensures reliability in remote or power-restricted environments, eliminates battery dependency, and offers straightforward, robust performance with minimal maintenance requirements.

Q: How should I clean and maintain the Whirling Hygrometer?

A: Wipe the exterior gently with a damp cloth and clean the thermometers carefully. The cotton wick on the wet-bulb should be replaced as required, ensuring accuracy and device longevity.

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