RK-930 Digital Dew Point Meter

A. Product Overview

The R-Tek RK-930 Digital Dew Point Meter is a handheld instrument designed to measure important environmental parameters related to air temperature and moisture.

Instead of requiring separate instruments for temperature, humidity, dew point and wet bulb measurement, the RK-930 combines these functions into one portable meter. The IndustryBuying listing describes it as having four in one measurement, rapid response technology, flexible unit switching, data utility and long operating time.

Key Specifications

• Model: R-Tek RK-930
• Product type: Digital Dew Meter
• Temperature range: minus 20°C to 70°C
• Humidity range: 0 to 100 percent RH
• Dew point range: minus 20°C to 50°C
• Wet bulb range: minus 20°C to 50°C
• Temperature accuracy: plus or minus 1°C
• Display: Integrated backlit LCD
• Dimensions: 180 x 50 x 30 mm
• Weight: approximately 93 g
• Power supply: Three 1.5 V AAA batteries
• Functions: Temperature, humidity, dew point and wet bulb measurement
• Package contents: Dew meter, instruction manual and battery

These specifications are taken from the published IndustryBuying listing.

B. Working Principle

The IndustryBuying product page does not specify the exact sensor technology or internal calculation algorithm used in the RK-930. However, portable environmental meters that provide temperature, relative humidity, dew point and wet bulb readings generally work by measuring air temperature and relative humidity, then using those values to determine additional humidity parameters.

Dew point is the temperature at which air becomes saturated with water vapour and condensation can begin. Dew point can be calculated using measured air temperature and relative humidity. Vaisala documents this relationship and describes dew point temperature calculation as being based on air temperature and relative humidity.

A typical measurement sequence is:

1. The meter senses the surrounding air temperature.
2. The humidity sensing system determines relative humidity.
3. The electronic circuitry processes these measured values.
4. Temperature and relative humidity are displayed.
5. Dew point and wet bulb values can then be derived from the temperature and humidity information.

Comparable professional thermo hygrometers also measure temperature and relative humidity while calculating dew point and wet bulb temperature.

Because the RK-930 manufacturer listing does not describe its internal sensor or calculation method, the exact internal implementation should not be assumed beyond the published four measurement functions.

C. Why is the RK-930 Digital Dew Point Meter Used?

The RK-930 is used when temperature alone is not sufficient to understand environmental conditions.

Humidity, dew point and wet bulb temperature provide additional information about the amount of moisture present in the air and the possibility of condensation.

Temperature Measurement

Temperature measurement helps users monitor the thermal condition of a room, process area, warehouse, laboratory or other environment.

Relative Humidity Measurement

Relative humidity indicates the amount of water vapour in the air relative to the maximum amount the air can hold at its current temperature.

It is particularly useful for:

• HVAC inspection
• Indoor environmental monitoring
• Warehouses
• Production areas
• Laboratories
• Storage facilities
• Building maintenance

Dew Point Measurement

Dew point measurement helps identify the temperature at which condensation may begin.

This is useful when condensation could affect:

• Stored products
• Machinery
• Electrical equipment
• Building surfaces
• Manufacturing processes
• Environmental conditions
• Sensitive materials

Dew point is widely used in industrial humidity measurement because it provides useful information about moisture content and condensation risk.

Wet Bulb Temperature Measurement

Wet bulb temperature describes the combined influence of temperature and moisture conditions.

It can be useful in applications involving:

• HVAC systems
• Ventilation assessment
• Environmental monitoring
• Cooling performance
• Indoor climate evaluation

The ability to obtain temperature, relative humidity, dew point and wet bulb readings from one device makes the RK-930 useful for technicians who regularly inspect environmental conditions.

D. Suitable Buyers

The R-Tek RK-930 Digital Dew Point Meter can be suitable for professionals and organizations that need portable temperature and humidity related measurements.

Potential buyers include:

• HVAC engineers
• HVAC service technicians
• Facility managers
• Maintenance engineers
• Environmental monitoring professionals
• Quality control departments
• Manufacturing companies
• Industrial plants
• Laboratories
• Warehouses
• Cold storage facilities
• Building maintenance contractors
• Electrical maintenance teams
• Air conditioning service companies
• Ventilation contractors
• Indoor air quality professionals
• Safety departments
• Production engineers
• Pharmaceutical facilities
• Food storage facilities
• Research laboratories
• Educational laboratories
• Commercial building operators
• Hotels and hospitals
• Environmental testing companies

Frequently Asked Questions

1. What is the R-Tek RK-930?

The R-Tek RK-930 is a portable digital dew point meter designed for environmental measurement. It provides temperature, relative humidity, dew point and wet bulb measurements in one instrument.

2. What parameters can the RK-930 measure?

The RK-930 provides four main measurement functions: temperature, relative humidity, dew point and wet bulb temperature.

3. What is the temperature range of the RK-930?

The published temperature measuring range is minus 20°C to 70°C.

4. What is the humidity range of the RK-930?

The RK-930 has a published relative humidity range of 0 to 100 percent RH.

5. What is the dew point range of the RK-930?

The listed dew point measuring range is minus 20°C to 50°C.

6. What is the wet bulb temperature range?

The published wet bulb range is minus 20°C to 50°C.

7. What does dew point mean?

Dew point is the temperature at which air becomes saturated with water vapour and condensation can begin to form. It is an important parameter for evaluating moisture conditions and condensation risk.

8. How is dew point determined?

Dew point can be calculated using measured air temperature and relative humidity. The exact internal calculation method used by the RK-930 is not stated on the supplied product page.

9. Can the RK-930 measure both temperature and humidity?

Yes. The RK-930 measures both temperature and relative humidity, along with dew point and wet bulb temperature.

10. Can the RK-930 be used for HVAC applications?

Yes. Temperature, humidity, dew point and wet bulb measurements are all relevant to HVAC and ventilation assessment. Similar professional temperature and humidity instruments are used for measurements in ventilation ducts and indoor environments.

11. Can the RK-930 be used in warehouses?

Yes. Portable temperature and humidity measurement instruments are commonly used for checking environmental conditions in warehouses and storage areas. Dew point information can additionally help assess condensation conditions.

12. Does the RK-930 have a backlit display?

Yes. The IndustryBuying specification lists an integrated backlight LCD.

13. What is the temperature accuracy of the RK-930?

The listed temperature accuracy is plus or minus 1°C.

14. How is the RK-930 powered?

The meter operates using three 1.5 V AAA batteries.

15. Is the RK-930 portable?

Yes. The meter measures approximately 180 x 50 x 30 mm and weighs about 93 g, making it suitable for handheld field measurements.

16. Why measure dew point instead of only relative humidity?

Relative humidity changes with temperature, whereas dew point provides another way to understand the actual moisture condition of the air and potential condensation. This makes dew point particularly useful in HVAC, storage, industrial and environmental monitoring applications.

17. Can the RK-930 be used for indoor climate monitoring?

Yes. Its combination of temperature, relative humidity, dew point and wet bulb measurements makes it suitable for checking environmental conditions in offices, commercial buildings, laboratories, warehouses and similar indoor locations.