Chapter 2 __________________________________________________________ Product Overview
VAISALA _______________________________________________________________________ 17
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features, advantages, and the product
nomenclature of the Vaisala DRYCAP® Dewpoint and Temperature
Transmitter DMT340 Series.
Introduction to DMT340
The DMT340 transmitter measures dewpoint temperature accurately in a
measurement range from -60ºC to +80 ºC (-76 ... +176 ºF). The AutoCal
feature provides excellent long term stability of the measurement.
DMT340 incorporates the advanced DRYCAP® technology, which
enables reliable and high-performance dewpoint measurement.
Apart from the extended dewpoint measurement range the optional
modules provide for more flexibility. See Table 2 below for the
quantities that DMT340 measures and calculates. See Table 3 below for
the optional quantities measured by DMT340.
Table 2
Quantities and Their Abbreviations
Quantity Abbreviation Metric
Unit
Non-Metric
Unit
Dewpoint/frost point
temperature (T
d/f
)
TDF ºC
ºF
Mixing ratio (x)
X
g/kg
gr/lb
Parts per million
H2O
ppm
v
/ ppm
w
ppm
v
/ ppm
w
