Vaisala DMW19 Technical data
P.O. Box 26, FIN-00421 Helsinki, FINLAND
Fax: +358 9 8949 2485
Email: industrialsales@vaisala.com
DMW19 Wall Mount Dewpoint Transmitter
for Indoor Applications
Features/Benefits
• Designed for demanding building
automation applications and other
wall mount indoor applications
where dewpoint measurement is
needed
• Dewpoint measurement range
-20...+55 °C Td (-4...+131 °F Td)
• Accuracy ±2 °C T
• Vaisala HUMICAP® Sensor for
excellent accuracy and long-term
stability, negligible hysteresis and
resistance to dust and most
chemicals.
• Electronic, on site, one-point
field check with Vaisala HUMICAP®
Hand-Held Humidity and
Temperature Meter HM70
d
Tel: +358 9 894 91
www.vaisala.com
Vaisala HUMICAP® Dewpoint Transmitter DMW19 is a compact wall mount dewpoint
transmitter.
The wall mount Vaisala HUMICAP®
Dewpoint Transmitter DMW19 is
designed for use in air conditioning
and other indoor wall mount
applications where accurate and stable
dewpoint measurement is required.
DMW19 is an ideal choice for
demanding building automation
applications where dewpoint is the
preferred parameter for humidity
measurement.
Proven Vaisala HUMICAP
®
Sensor Technology
The operation of DMW19 is based on
Vaisala HUMICAP® Sensor. The
dewpoint is calculated from relative
humidity and temperature. The
patented Vaisala HUMICAP® Sensor is
insensitive to dust, particulate dirt and
most chemicals. This results in high
accuracy, excellent long-term stability
and negligible hysteresis.
Easy to install
DMW19 is compact and lightweight. In
addition, DMW19 is easy to install and
it is suitable for different junction
boxes.
Fast, on-site field check
The accuracy of the transmitter is
simple to check on-site using the
Vaisala HUMICAP® Hand-Held
Humidity and Temperature Meter
HM70.
Customized calibration and
maintenance contracts for the DMW19
are available on request.
DMW19 is suitable for demanding building
automation and other wall mount indoor
dewpoint measurements.
The Vaisala HUMICAP®
Hand-Held Humidity
and Temperature Meter
HM70 is an easy and fast
way to confirm the
performance of DMW19
on site.
30 Vaisala Product Catalog 2005
Ref. B210435en rev. A
DMW19
Technical Data
DEWPOINT
Dewpoint temperature
Measurement range -20...+55 °C (-4...+131 °F)
Accuracy ±2 °C (±3.6 °F)
(See the graph below)
Response time 15 s
Humidity sensor Vaisala HUMICAP® 180
Temperature sensor Pt 100 IEC 751 1/3 class B
Operating environment
Operating temperature -5...+60 °C (+23...+140 °F)
Storage temperature -40...+80 °C (-40...+176 °F)
Relative humidity 0...95 %RH
operating and storage
Outputs
Analog output (scalable) 4...20 mA
0...1 V
0...5 V
Resolution for current output 0.002 mA
Resolution for voltage output 0.3 mV
Typical temperature dependence 0.005% of span/°C
Wiring
Dimensions
Dimensions in mm.
General
Operation voltage with voltage output 12...35 VDC
11...28 VAC
Operation voltage with current output
20...35 VDC / 19...28 VAC with RL500 ohm
17...35 VDC / 16...28 VAC with RL50 ohm
Supply current 10 mA + load current
Load for voltage output min. 10 kohm
Load for current output max. 500 ohm
Connections screw terminals 0.5...1.5.mm
Housing ABS plastics
Housing classification IP33
Weight 110 g
Options and Accessories
For field check HM70 hand-held humidity
and temperature meter
Connection cable for HM70 211917ZZ
Electromagnetic compatibility
Complies with EMC standard EN61326-1:1997 + Am1:1998 +
Am2:2001; Generic Environment.
Ref. B210435en rev. A
2
HUMICAP® is a registered trademark of Vaisala.
Specifications subject to change without prior notice.
© Vaisala Oyj
31Vaisala Product Catalog 2005
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