
www.vaisala.com
36
HMW40/50 and HMD40/50 Wall and
Duct Mount Transmitters for HVAC Applications
The two and three-wire Vaisala
INTERCAP
®
Humidity and
Temperature Transmitters HMD/W40
and HMD/W50 are designed for use
in energy management systems in
buildings. They combine excellent
stability with easy installation and
reliable operation. The HMD40/50
are for duct installations and the
HMW40/50 for wall installations.
Low maintenance costs
The HMD40/50 humidity transmitters
use Vaisala INTERCAP
®
Sensor -
the world’s rst interchangeable
capacitive humidity sensor. The
transmitters require no recalibration
if the sensor is changed. This means
great savings in overall maintenance
costs. The sensor is also insensitive
to dust as well as most chemicals.
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.
Measures both humidity
and temperature
The 40/50 series is available as
humidity and temperature (Y), or
humidity only (U) transmitters. The
transmitters measure humidity with
a ±3 %RH accuracy and a ±1 %RH
stability per year.
Selectable functions
(HMD/W50)
The HMD/W50 transmitters feature
selectable output signals of 0 to 1 V
and 0 to 10 V. They can be powered
by either AC or DC voltage.
Features/Benefi ts
▪
Specially designed for building
energy management systems
▪
10 ... 90 %RH measurement
▪
-10 ... +60 °C (+14 ... +140 °F)
operating range for duct units
▪
-5 ... +55 °C (+23 ... +131 °F)
operating range for wall units
▪
4 ... 20 mA 2-wire output
(HMD/W40)
▪
Selectable voltage 3-wire
output (HMD/W50)
▪
Combines excellent stability
with easy installation and
reliable operation
▪
No recalibration
▪
Fully interchangeable Vaisala
INTERCAP® Sensor is easy to
replace
▪
Low cost
In energy management systems, the
accurate measurement of relative
humidity and temperature is essential
for optimum control of the environment.
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