www.vaisala.
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HMW40/50 and HMD40/50 Wall and
Duct Mount Transmitters for HVAC Applications
In energy management systems, the
accurate measurement of relative
humidity and temperature is essential
for optimum control of the environment.
Vaisala INTERCAP ® Humidity and Temperatur e Transmtters HMD/W40/50 are
competitively priced and require no routine maintenance – a smart choice for your
HVAC/EMC applications.
Features/Benefits
The two and three-wire Vaisala Measures both humidity
INTERCAP® Humidity and and temperature
▪ Specially designed for building Temperature Transmitters HMD/W40
The 40/50 series is available as
energy management systems and HMD/W50 are designed for use
humidity and temperature (Y), or
▪ 10 ... 90 %RH measurement in energy management systems in
humidity only (U) transmitters. The
buildings. They combine excellent
▪ -10 ... +60 °C (+14 ... +140 °F)
stability with easy installation and
transmitters measure humidity with
operating range for duct units a ±3 %RH accuracy and a ±1 %RH
reliable operation. The HMD40/50
▪ -5 ... +55 °C (+23 ... +131 °F)
are for duct installations and the
stability per year.
operating range for wall units
HMW40/50 for wall installations.
Selectable functions
▪ 4 ... 20 mA 2-wire output
(HMD/W50)
(HMD/W40) Low maintenance costs
The HMD/W50 transmitters feature
▪ Selectable voltage 3-wire The HMD40/50 humidity transmitters
selectable output signals of 0 to 1 V
output (HMD/W50) use Vaisala INTERCAP® Sensor -
and 0 to 10 V. They can be powered
▪ Combines excellent stability the world’s first interchangeable
by either AC or DC voltage.
with easy installation and capacitive humidity sensor. The
reliable operation transmitters require no recalibration
▪ No recalibration if the sensor is changed. This means
great savings in overall maintenance
▪ Fully interchangeable Vaisala
costs. The sensor is also insensitive
INTERCAP® Sensor is easy to
to dust as well as most chemicals.
replace
▪ Low cost
Technical data
Relative humidity Power supply
Measurement range 10 ... 90 %RH HMD/W40 10 ... 28 VDC
(for which accuracy is specified) HMD/W50 for 0 ... 1 V output: 12 ... 35 VDC/12 ... 24 VAC
Operating range for 0 ... 10 V output: 15 ... 35 VDC/15 ... 24 VAC
HMD40/50 0 ... 100 %RH Electromagnetic compatibility: Complies with EN61326-1,
HMW40/50 0 ... 90 %RH Generic Environment
Accuracy at +20 °C (+68 °F) better than ±3 %RH Current consumption
Stability ±2 %RH over 2 years HMD/W50 6 mA typical
Temperature dependence <±1.5 %RH from -10 ... +60 °C Operating temperature range
(+14 ... 140 °F) HMD40/50 -10 ... +60 °C (+14 ... +140 °F)
Sensor INTERCAP® Sensor, part no. 15778HM HMW40/50 -5 ... +55 °C (+23 ... +131 °F)
Storage temperature range -40 ... +60 °C (-40 ... +140 °F)
Temperature (40Y and 50Y) Operating humidity range
Measurement range HMD40/50 0 ... 100 %RH
HMD40/50 -10 ... +60 °C (+14 ... +140 °F) HMW40/50 0 ... 90 %RH
HMW40/50 -5 ... +55 °C (+23 ... +131 °F) Housing
Total accuracy at +25 °C ±0.3 °C (±0.54 °F) Material ABS plastic
Temperature dependence 0.01 °C/°C (0.01 °F/°F) Classification (HMD40/50) IP65(NEMA 4)
Sensor Pt 1000 IEC 751 class B Colour(HMW40/50) NCS0502-G50Y
General Dimensions
Output signal for relative humidity (equals 0...100 %RH) Dimensions in mm.
HMD/W40 4 ... 20 mA HMW40/50
HMD/W50 0 ... 1 V & 0 ... 10 V
Output signal for temperature
HMD/W40 4 ... 20 mA
HMW50 0 ... 1 V & 0 ... 10 V
HMD50 0 ... 10 V
HMD40Y, HMD50Y equals -40 ... +60 °C (-40 ... 140 °F)
HMW40Y, HMW50Y equals -5 ... +55 °C (+23 ... 131 °F)
HMD40/50
INTERCAP® is a registered trademark of Vaisala
For more information, visit Ref. B210945EN-A ©Vaisala 2010
This material is subject to copyright protection, with all
www.vaisala.com or contact copyrights retained by Vaisala and its individual partners. All
us at sales@vaisala.com rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
