Dew point temperature

Dew point temperature - HMT120

HMT120 User Guide

Document code

M211244EN

Revision

Language

English

Product

HMT120

Document type

User guide

The dew point temperature (T_d) of a moist air sample is the temperature to which the sample must be cooled to reach saturation with respect to liquid water.

Dew point temperature (T_d) is calculated with the following formula:

_{T_{d} = \frac{\frac{T n}{m}}{\log (\frac{P w}{A})} - 1 [° C]}

Pw is the water vapor pressure (see the separate calculation formula for P_w). The parameters A, m, and Tn depend on the temperature as shown in table NN.

Table 1. Temperature dependence for A, m, and Tn
T	A	m	Tn
... 0 °C	6.119866	7.926104	250.4138
0 ... 50 °C	6.1078	7.5000	237.30
50 ... 100 °C	5.9987	7.3313	229.10
100 ... 150 °C	5.8493	7.2756	225.00
150 ... °C	6.2301	7.3033	230.00