Sling Psychrometer Whirling Hygrometer Thermometer Plastic Body (Type centigrade) 0 to 50 Deg C Dry | 0 to 50 Deg C Wet

Description

Sling Psychrometer Whirling Hygrometer Thermometer, Plastic Body, Type Centigrade, Dry Bulb 0 to 50°C | Wet Bulb 0 to 50°C

Accurate Sling Psychrometer for Reliable Humidity and Temperature Measurement

The Sling Psychrometer Whirling Hygrometer Thermometer with Plastic Body is a precision-engineered environmental measuring instrument designed for accurate determination of relative humidity (RH) and ambient air temperature using the internationally accepted psychrometric method. Featuring Dry Bulb and Wet Bulb thermometers with a measuring range of 0 to 50°C, this lightweight and portable instrument provides reliable humidity measurement for laboratories, industrial plants, HVAC systems, educational institutions, agriculture, pharmaceutical industries, weather monitoring, and environmental studies.

Manufactured with a durable engineering plastic body, the Sling Psychrometer combines precision, portability, and ease of use. The instrument requires no electricity, batteries, or electronic sensors, making it a dependable solution for both field and indoor environmental monitoring. By simply rotating the instrument through the air, users can obtain accurate wet bulb and dry bulb readings and calculate relative humidity using a standard psychrometric chart or humidity table.

Whether used by engineers, laboratory technicians, HVAC professionals, researchers, or students, this Sling Psychrometer offers an economical and reliable method of measuring atmospheric humidity and temperature.

Accurate Sling Psychrometer for Reliable Humidity and Temperature Measurement

The Sling Psychrometer Whirling Hygrometer Thermometer with Plastic Body is a precision-engineered environmental measuring instrument designed for accurate determination of relative humidity (RH) and ambient air temperature using the internationally accepted psychrometric method. Featuring Dry Bulb and Wet Bulb thermometers with a measuring range of 0 to 50°C, this lightweight and portable instrument provides reliable humidity measurement for laboratories, industrial plants, HVAC systems, educational institutions, agriculture, pharmaceutical industries, weather monitoring, and environmental studies.

Manufactured with a durable engineering plastic body, the Sling Psychrometer combines precision, portability, and ease of use. The instrument requires no electricity, batteries, or electronic sensors, making it a dependable solution for both field and indoor environmental monitoring. By simply rotating the instrument through the air, users can obtain accurate wet bulb and dry bulb readings and calculate relative humidity using a standard psychrometric chart or humidity table.

Whether used by engineers, laboratory technicians, HVAC professionals, researchers, or students, this Sling Psychrometer offers an economical and reliable method of measuring atmospheric humidity and temperature.

Accurate Humidity Measurement Using the Psychrometric Principle

Humidity plays a critical role in environmental monitoring and industrial processes. Excessive or insufficient humidity can affect product quality, equipment performance, crop growth, laboratory testing, and human comfort.

The Sling Psychrometer measures humidity by comparing the readings of two thermometers:

• Dry Bulb Thermometer
• Wet Bulb Thermometer

The Dry Bulb measures the actual ambient air temperature, while the Wet Bulb measures the cooling effect produced by water evaporation from the wetted wick. The difference between these two temperatures is used to determine the Relative Humidity (RH) through psychrometric tables or charts.

This internationally accepted method provides highly reliable humidity measurements without relying on electronic sensors.

Temperature Measuring Range

The instrument incorporates two precision thermometers with identical measuring ranges.

Dry Bulb Range

• 0°C to +50°C

Wet Bulb Range

• 0°C to +50°C

This measuring range is ideal for:

• Indoor environmental monitoring
• HVAC testing
• Greenhouses
• Warehouses
• Laboratories
• Agricultural facilities
• Educational demonstrations
• Industrial workplaces
• Commercial buildings
• Pharmaceutical production areas

The thermometer provides consistent and stable temperature readings across the complete operating range.

Durable Plastic Body Construction

The Sling Psychrometer is manufactured with a high-quality engineering plastic body, offering excellent durability while remaining lightweight and easy to handle.

Benefits

• Lightweight construction
• Corrosion-resistant material
• Comfortable grip
• Easy portability
• Good impact resistance
• Long operational life
• Suitable for indoor and outdoor use

The plastic body is designed to withstand regular field use while protecting the precision thermometers.

Manual Whirling Operation

The Sling Psychrometer generates airflow by manually rotating the instrument using its handle.

During whirling:

• Air flows rapidly across both thermometers.
• Water evaporates from the wet bulb wick.
• The wet bulb temperature decreases.
• The dry bulb measures ambient temperature.
• The temperature difference is established.
• Relative humidity is calculated.

Advantages

• Uniform airflow
• Accurate humidity determination
• Fast response
• Reliable field measurements
• No electrical fan required

The manual sling mechanism ensures repeatable and dependable results under a variety of environmental conditions.

Dry Bulb Thermometer

The Dry Bulb thermometer records the actual surrounding air temperature.

It serves as the reference temperature for humidity calculations and provides accurate environmental temperature measurement.

Applications include:

• Weather monitoring
• Laboratory testing
• HVAC inspections
• Industrial process monitoring

Wet Bulb Thermometer

The Wet Bulb thermometer is fitted with a moisture-retaining wick.

When moistened with clean water and rotated through the air, evaporation cools the thermometer, producing a lower reading than the dry bulb.

The amount of cooling depends on the surrounding humidity level.

Higher humidity results in less evaporation, while lower humidity produces greater evaporative cooling.

Reliable Relative Humidity Determination

After obtaining the Dry Bulb and Wet Bulb readings, Relative Humidity can be calculated using:

• Psychrometric charts
• Humidity tables
• Psychrometric calculators
• Environmental calculation software

The instrument provides dependable humidity measurements for:

• Environmental monitoring
• Industrial quality control
• Scientific research
• Climate observation
• HVAC performance evaluation

Applications Across Multiple Industries

The Sling Psychrometer is widely used across numerous industries and institutions.

1. HVAC Industry

Measures humidity during installation, servicing, balancing, and maintenance of air-conditioning and ventilation systems.

2. Meteorological Stations

Records atmospheric temperature and humidity for weather forecasting and climate analysis.

3. Agriculture

Monitors humidity conditions for irrigation planning, crop protection, and greenhouse management.

4. Greenhouses

Helps maintain optimum environmental conditions for plant growth.

5. Pharmaceutical Industry

Monitors humidity in production facilities, clean rooms, and storage areas.

6. Textile Industry

Maintains proper humidity during spinning, weaving, dyeing, and finishing processes.

7. Food Processing

Measures environmental conditions during food production and storage.

8. Laboratories

Supports environmental testing, research, and calibration activities.

9. Educational Institutions

Ideal for teaching environmental science, physics, engineering, and meteorology.

10. Warehouses

Monitors storage conditions for moisture-sensitive products and materials.

Easy Operation

Using the Sling Psychrometer is straightforward:

1. Wet the cotton wick on the Wet Bulb thermometer with clean distilled water.
2. Hold the instrument securely by its handle.
3. Rotate the instrument smoothly for approximately 20–30 seconds.
4. Read both the Dry Bulb and Wet Bulb temperatures.
5. Use a psychrometric chart or humidity table to determine Relative Humidity.

This simple procedure enables accurate humidity measurement without complicated equipment.

Maintenance-Free Performance

The Sling Psychrometer requires very little maintenance.

Routine care includes:

• Keeping the thermometers clean
• Replacing the wet bulb wick when worn
• Using clean distilled water
• Protecting the instrument from impacts
• Periodically checking calibration

The absence of electronics reduces maintenance requirements and ensures dependable long-term performance.

Long Service Life

Manufactured using precision glass thermometers and durable engineering plastic, the Sling Psychrometer is designed for years of reliable operation.

Its robust construction offers:

• Stable calibration
• Excellent repeatability
• Durable body
• Reliable humidity measurement
• Long operational life
• Consistent field performance

It remains one of the most economical and dependable instruments for humidity measurement.

Why Choose This Sling Psychrometer?

The Sling Psychrometer Whirling Hygrometer Thermometer combines precision mechanical thermometers with a durable lightweight plastic body to deliver accurate environmental monitoring in laboratories, industries, educational institutions, and field applications.

Whether used in HVAC systems, pharmaceutical plants, textile industries, laboratories, educational institutions, agricultural research, meteorological stations, food processing facilities, warehouses, or environmental monitoring projects, the Sling Psychrometer Whirling Hygrometer Thermometer provides accurate humidity measurement, dependable temperature monitoring, and long-lasting performance. Its lightweight plastic construction, reliable psychrometric measuring principle, and simple manual operation make it an ideal choice for professionals seeking an economical and accurate humidity measurement instrument.

Japsin Instrumentation – Since 1974