# TQC Dew Point Calculator

## TQC Dew Point Calculator

TQC Dew Point calculator is a handy tool to determine dew point temperature based upon the measurements from sling psychrometer . The measurement unit is available in Celsius and also Fahrenheit converter.

The simple calculator for determining the dew point and relative humidity using the measurements, carried out with a Slinger psychrometer (measured in the wet / dry bulb principle) or an Electronic Temperature and also Relative Humidity meter.

### Standard ISO 8502-4

Calculate the dew-point, which is a logarithmic function of the vapour pressure at the actual temperature. There are tables or charts from which the dew-point can be determined. Their parameters are air temperature and relative humidity at a given atmospheric pressure. Such as table is given in Annex A. Commercial dew-point calculators of sufficient accuracy may also be used.

 Relative humidity, % 98 95 92 90 85 80 Temperature drop, °C 0,3 0,8 1,3 1,6 2,5 3,4 NOTE     The figures are mean values for air temperatures from 0 °C to 35 °C. For a given air temperature, more accurate figures can be obtained from Annex A.

### TQC Dew Point Calculator DETERMINATION OF VALUES

1. If a sling psychrometer, so called wet- dry bulb temperature is being
• After that is determine the dew point by putting the dry bulb temperature (upper white scale 1) against the wet bulb temperature (upper black scale).
• Read the dew point in the window 2 against the earlier determined wet bulb
1. If an electronic Temperature and also Humidity meter is being used.
• Another step is determine the dew point by putting the black arrow on the lower scale 4 (Relative Humidity % RH) against the measured RH value in the measured RH value in the windows.
• Finally focus on the measured temperature at scale 3 and read the dew point on the lower black scale (Dew Point).

### For Example:

 Dry bulb temperature: 25°C Wet bulb temperature: 19°C Dew point: 16°C Relative humidity: 58%

The TQC Dew Point Calculator is made of durable plastic; simply wipe clean and dry with a soft cloth, and also return to the protective sleeve. About 6″ in diameter, the Dewpoint Wheel is easily stored in the coating inspector’s kit case.