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HMT331 Humidity and Temperature Transmitter
for Demanding Wall-Mounted Applications
The Vaisala HUMICAP
®
Humidity and
Temperature Transmitter HMT331
is the top-of-the-line wall-mounted
transmitter for demanding HVAC and
condition monitoring applications.
Compared to regular wall-mounted
transmitters, the HMT331 offers,
higher measurement performance,
better chemical tolerance, advanced
graphical display features, more
powering options, more output
options and a wider variety of output
humidity parameters.
Features/Benefi ts
For temperatures -40 ... +60 °C
(-40 ... +140 °F)
Application examples:
cleanrooms, pharmaceutical
processes, greenhouses,
swimming halls, museums and
archives
The HMT331 is the state-of-the-art wall-mount humidity instrument.
Graphical display of
history and
measurement trends
The HMT330 series features a large
numerical and graphical display,
allowing users to easily monitor
operational data, measurement trends
and one-year measurement history.
The optional data logger with real-
time clock makes it possible to
generate over four years of measured
history, and zoom in on any desired
time or time frame.
Outputs and power supply
options for every need
The output options include three
analog outputs, RS-232, RS-485, and
alarm relays.
The voltage supply range is from 10 to
35 VDC. With an additional module,
the transmitter can be connected to
all universal mains AC supplies.
The input/output cable can be fed
through the back of the transmitter,
which is a useful feature, especially
for installations in cleanrooms.
HMT331 Humidity and Temperature
Transmitter for demanding wall-
mounted applications
Technical Data
Temperature measurement range
-40 ... +60 °C (-40 ... +140 °F)
Accessories
PC software + cable 215005
USB-RJ45 Serial Connection Cable 219685
Connection cable for HM70 211339
Wall mounting plate (plastic) 214829
Pole installation kit 215108
Rain shield 215109
DIN rail installation set 215094
Dimensions
Dimensions in mm (inches)
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