A. Product Overview

The R-Tek RT-084 Wet and Dry Bulb Thermo Hygrometer is designed for users who need a simple method of monitoring temperature and atmospheric humidity.

The instrument uses two calibrated thermometers positioned together. One functions as the dry bulb thermometer while the other works with a wetted wick as the wet bulb thermometer. The difference between these two temperature readings can be used with the supplied hygrometer chart to determine the relative humidity of the surrounding air.

R-Tek specifies the RT-084 as a highly accurate and easy-reading hanging-type instrument manufactured with an ABS plastic body. It is available in both alcohol-filled and mercury-filled variants.

Key Features

• Model: RT-084
• Product Type: Wet and Dry Bulb Thermometer and Thermo Hygrometer
• Temperature Range: -20°C to 50°C
• Fahrenheit Range: 0°F to 120°F
• Calibrated thermometers
• Designed for high accuracy
• Easy-to-read scale
• ABS plastic body
• Hanging-type construction
• Alcohol-filled version available
• Mercury-filled version available
• Hygrometer chart included
• Extra wick included
• Test certificate provided
• One-year warranty
• Custom branding available for bulk orders

These specifications are directly stated by R-Tek.

B. Working Principle

The RT-084 works on the wet bulb and dry bulb psychrometric principle.

The dry bulb thermometer measures the normal ambient air temperature. The wet bulb thermometer has a wick around its sensing bulb. When this wick is moistened with water, evaporation from the wet surface causes cooling.

Because of this evaporative cooling, the wet bulb generally shows a lower temperature than the dry bulb.

The difference between the two temperatures depends on the moisture content of the surrounding air:

• When the air is dry, evaporation is greater and the wet bulb temperature falls further below the dry bulb temperature.
• When humidity is high, evaporation is reduced and the difference between the two readings becomes smaller.
• When the air approaches complete saturation, the wet bulb and dry bulb readings approach each other.

The difference between the wet bulb and dry bulb temperatures can then be compared with a hygrometer or relative humidity chart to determine the relative humidity of the air. This is the established operating principle of a wet and dry bulb psychrometer.

The RT-084 includes a hygrometer chart and an extra wick for this purpose.

C. Why Is the RT-084 Wet and Dry Bulb Thermo Hygrometer Used?

The RT-084 is used for checking ambient temperature and estimating relative humidity in environments where a simple visual instrument is preferred.

Temperature alone does not provide complete information about environmental conditions. Relative humidity is also important because the moisture level in air can influence storage conditions, manufacturing processes, comfort, laboratory environments and material quality.

A wet and dry bulb thermo hygrometer provides both temperature information and a method of determining relative humidity without depending on an electronic humidity sensor.

Typical uses can include:

• Ambient temperature monitoring
• Relative humidity measurement
• Laboratory environmental monitoring
• Warehouse temperature and humidity monitoring
• Storage area monitoring
• Industrial room monitoring
• Manufacturing area monitoring
• Educational demonstrations
• HVAC inspection
• Agricultural environment monitoring
• General indoor environmental monitoring
• Quality control applications

These are typical applications of wet and dry bulb hygrometers. R-Tek itself does not specify each of these individual applications on the RT-084 webpage.

D. Suitable Buyers

The R-Tek RT-084 Wet and Dry Bulb Thermo Hygrometer can be suitable for organizations and professionals who require straightforward temperature and relative humidity monitoring.

Potential buyers include:

• Laboratories
• Schools and colleges
• Universities
• Research institutes
• Factories
• Manufacturing plants
• Warehouses
• Storage facilities
• Quality control departments
• Maintenance departments
• HVAC contractors
• Facility management companies
• Agricultural facilities
• Pharmaceutical facilities
• Industrial instrumentation suppliers
• Laboratory equipment suppliers
• Scientific instrument dealers
• Temperature and humidity instrument dealers
• Government laboratories
• Educational laboratories

For applications requiring a specific accuracy class, traceable calibration standard or regulatory compliance, the required documentation should be confirmed separately before purchase.

Frequently Asked Questions

1. What is the R-Tek RT-084?

The R-Tek RT-084 is a wet and dry bulb thermometer designed for temperature measurement and relative humidity determination. It uses calibrated thermometers and includes a hygrometer chart for interpreting wet bulb and dry bulb readings.

2. What is the temperature range of the RT-084?

The R-Tek RT-084 has a specified temperature range of -20°C to 50°C, corresponding to approximately 0°F to 120°F on the manufacturer-listed scale.

3. Can the RT-084 measure humidity?

The RT-084 can be used to determine relative humidity by comparing its wet bulb and dry bulb temperature readings and using the supplied hygrometer chart.

4. How does a wet and dry bulb hygrometer work?

One thermometer measures normal air temperature while the second uses a moistened wick. Evaporation cools the wet bulb, creating a temperature difference between the wet bulb and dry bulb readings. This difference can be used to determine relative humidity.

5. What is the dry bulb temperature?

Dry bulb temperature is the normal air temperature measured by the thermometer without a wet wick. It represents the ambient temperature of the surrounding air.

6. What is the wet bulb temperature?

Wet bulb temperature is measured using a thermometer with a moistened wick around its sensing element. Evaporation of water from the wick cools the thermometer, causing it to normally indicate a lower temperature than the dry bulb thermometer.

7. How is relative humidity calculated using the RT-084?

First, read the dry bulb temperature and wet bulb temperature. Calculate the difference between the two readings, then use the supplied hygrometer chart to determine the corresponding relative humidity.

8. Does the R-Tek RT-084 include a hygrometer chart?

Yes. R-Tek specifies that a hygrometer chart is included with the RT-084.

9. Does the RT-084 come with an extra wick?

Yes. An extra wick is included with the RT-084 according to the manufacturer.

10. Is the R-Tek RT-084 calibrated?

Yes. R-Tek states that calibrated thermometers are used in the RT-084 for high accuracy.

11. Is the RT-084 available in alcohol-filled type?

Yes. R-Tek offers an alcohol-filled version of the RT-084.

12. Is the RT-084 available in mercury-filled type?

Yes. The official R-Tek product page also lists a mercury-filled version of the RT-084.

13. What is the body material of the RT-084?

The R-Tek RT-084 uses an ABS plastic body.

14. Can the RT-084 be mounted on a wall?

The RT-084 is specified as a hanging-type instrument, allowing it to be positioned at a suitable fixed location for temperature and humidity observation.

15. Does the RT-084 require electricity or a battery?

The official R-Tek page does not specify any electrical power or battery requirement. The instrument is presented as a conventional wet and dry bulb thermometer rather than an electronic thermo hygrometer.

16. Does the R-Tek RT-084 come with a test certificate?

Yes. R-Tek states that a test certificate will be provided with the RT-084.

17. What warranty is provided with the RT-084?

The manufacturer lists a one-year warranty for the RT-084.

18. Is custom branding available for the RT-084?

Yes. R-Tek states that customized branding is available for bulk orders.

19. Is the RT-084 suitable for laboratory use?

It can be suitable for general laboratory temperature and relative humidity observation because it uses calibrated thermometers and includes a hygrometer chart. If a laboratory requires NABL calibration, traceable certification or a specified measurement uncertainty, those requirements should be confirmed separately.

20. What is the difference between a thermo hygrometer and a wet and dry bulb hygrometer?

An electronic thermo hygrometer typically uses electronic sensors to display temperature and humidity directly. A wet and dry bulb hygrometer determines humidity by comparing the temperature of a dry thermometer with a thermometer cooled through evaporation from a wetted wick.