hmt330series_brochure
P.O. Box 26, FI-00421 Helsinki, Finland
Tel. +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com
HMT330 Series Humidity and Temperature
Transmitters for Industrial Applications
Features/Benefits
• Six models for demanding industrial
applications
• Full 0 ... 100 % RH measurement,
temperature range up to +180 °C
(+356 °F), depending on model
• Pressure tolerance up to 100 bar
(depending on model)
• Vaisala HUMICAP® Sensor for
excellent accuracy and stability
- Next generation sensor available
• Graphical display of measurement
trends and one-year history
• Multilingual user interface
• Excellent performance in harsh
chemical concentrations
• Corrosion resistant IP65 housing
• NIST traceable (certificate included)
The HMT330 transmitter family has the solution for demanding industrial humidity
measurements.
The Vaisala HUMICAP® Humidity
and Temperature Transmitter Series
HMT330 is designed for demanding
industrial applications where stable
measurement and wide customization
is important.
Vaisala HUMICAP®
performance
The HMT330 series incorporates
Vaisala’s 30 years of experience in
industrial humidity measurement.
Next to the proven reliable and accurate
HUMICAP® sensor, an updated, even
more stable and chemical resistant
sensor is available.
Chemical purge minimizes
effects of contaminants
In environments with high
concentrations of chemicals and
cleaning agents, chemical purge helps
to maintain measurement accuracy
between calibration intervals.
Chemical purge involves heating the
sensor to remove harmful chemicals.
The function can be initiated manually
or programmed to occur at set
intervals.
Graphical display of history
and measurement trends
The HMT330 can be ordered with a
large numerical and graphical display,
allowing the user to clearly monitor
operational data, measurement trends
and 1-year measurement history.
Data collection and transfer
to PC
The recorded measurement data can be
viewed on the display or transferred to
a PC with Microsoft Windows® software.
A USB-RJ45 cable makes it easy to
connect the HMT330 to a PC.
at six humidity points at the factory.
A quick, one-point field calibration can
be performed with the hand-held HM70
meter. A two-point calibration can be
performed with the HMK15 salt bath
calibrator in a controlled environment.
The transmitter can be sent to Vaisala
for recalibration. Accredited calibrations
and maintenance contracts are also
available.
Many ways to install and
versatile outputs
Mains and DC power options, and
several mounting accessories make the
instrument easy to install.
The HMT330 can have up to three
analog outputs. Isolated galvanic power
supply and analog outputs are also
available. For serial interface
the USB connection, RS232 and RS485
can be used.
Flexible calibration
The HMT330 instruments are calibrated
The display shows measurement trends,
real time data and history up to one year.
HMT330 SERIES
HUMIDITY
DEWPOINT
Performance
Relative humidity
Measurement range
0 ... 100 % RH
Accuracy (including non-linearity, hysteresis, and repeatability)
with Vaisala HUMICAP® 180 or 180R
for typical applications
with Vaisala HUMICAP® 180C or 180RC
for applications with
chemical purge/warmed probe
at +15... +25 °C (59... +77 °F)
±1 %RH (0 ... 90 %)
±1.7 %RH (90 ... 100 %RH)
at -20... +40 °C (-4... +104 °F)
±(1.0 + 0.008 x reading) %RH
at -40... +180 °C (-40... +356 °F)
±(1.5 + 0.015 x reading) %RH
with Vaisala HUMICAP® 180L2 for application with demanding
chemical environment
at -10... +40 °C (14... +104 °F)
± (1.0 + 0.01 x reading) %RH
at -40 ... +180 °C (-40... +356 °F)
± (1.5 + 0.02 x reading) %RH
Factory calibration uncertainty (+20 °C)
± 0.6 % RH (0 ... 40 %RH)
± 1.0 % RH (40 ... 97 %RH)
(Defined as ±2 standard deviation limits. Small
variations possible, see also calibration certificate.)
Response time (90 %) at +20 °C (+68 °F) in still air
8 s / 17 s* with grid filter
20 s / 50 s* with grid + steel netting filter
40 s / 60 s* with sintered filter
*
with HUMICAP® 180R or 180RC sensor
Temperature
Measurement range
HMT331
-40... +60 °C (-40... +140 °F)
HMT333
-40 ... +80 °C or -40 ... +120 °C
(-40... +176 °F or -40... +248 °F)
HMT334, HMT335, HMT337,
HMT338
-70... +180 °C (-94... +356°F)
Accuracy at +20 °C (+68 °F)
± 0.2 °C (± 0.36 °F)
Accuracy over temperature range
°C
0.7
0.6
0.5
0.4
0.3
0.2
0.1
°C
0
-0.1
-0.2
Inputs and outputs
Operating voltage
10...35 VDC, 24 VAC
with optional power supply module
100...240 VAC, 50/60 HZ
Power consumption at +20 °C (Uin 24 VDC)
RS-232
max. 25 mA
Uout 2 x 0 ... 1 V/0 ... 5 V/0 ... 10 V
max. 25 mA
Iout 2 x 0 ... 20 mA
max. 60 mA
display and backlight
+ 20 mA
during chemical purge
max. 110 mA
during probe heating (HMT337)
+ 120 mA
Analog outputs (2 standard, 3rd optional)
current output
0 ... 20 mA, 4 ... 20 mA
voltage output
0...1 V, 0...5 V, 0...10 V
Accuracy of analog outputs at +20 °C
±0.05% full scale
Temperature dependence
of the analog outputs
±0.005%/°C full scale
External loads
current outputs
RL < 500 ohm
0 ... 1 V output
RL > 2 kohm
0 ... 5 V and 0 ... 10 V outputs
RL > 10 kohm
Max. wire size
0.5 mm2 (AWG 20)
stranded wires recommended
Digital outputs
RS-232, RS-485 (optional)
Service connection
RS-232, USB
Relay outputs (optional)
0.5 A, 250 VAC
Display
LCD with backlight,
graphic trend display of any parameter
Menu languages
English, Chinese, Japanese, Spanish,
German French, Swedish, Russian, Finnish
Mechanics
Cable bushing
M20 x 1.5 for cable diameter
8 ... 11 mm/0.31 ... 0.43”
Conduit fitting
1/2” NPT
User cable connector (optional)
M12 series 8-pin (male)
option 1
female plug with 5 m (16.4 ft) black cable
option 2
female plug with screw terminals
Probe cable diameter
HMT333 (+80 °C)
6.0 m
other probes
5.5 m
Housing material
G-AlSi 10 Mg (DIN 1725)
Housing classification
IP 65 (NEMA 4)
Dimensions
-0.3
dimensions in mm (inches)
-0.4
-0.5
-0.6
-0.7
-80
-60
-40
-20
0
20
40
60
80
100
120
140
160
180
Ref. B210689EN rev. A 2007 - 8
Temperature sensor
PT 100 RTD 1/3 Class B IEC 751
Other variables available (depends on model)
dewpoint temperature, mixing ratio, absolute humidity, wet bulb
temperature, ethalpy, water vapor pressure
Operating environment
Operating temperature
for probe
for transmitter body
with display
Operating pressure
HMT334
HMT338
HMT335, HMT337
Electromagnetic compatibility
same as measurement range
-40... +60 °C (-40... 140 °F)
0... +60 °C (32... 140 °F)
0 ... 10 MPa (0 ... 100 bar)
0 ... 4 MPa (0 ... 40 bar)
vapor tight
Complies with EMC standard
EN61326-1, Industrial
Environment
HUMICAP® is a registered trademark of Vaisala.
Specifications are subject to change without prior notice.
©Vaisala Oyj
P.O. Box 26, FI-00421 Helsinki, Finland
Tel. +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com
HMT331 Humidity and Temperature Transmitter
for Demanding Wall-Mounted Applications
Features/Benefits
• For temperatures -40 ... +60 °C
(-40 ... +140 °F)
• Vaisala HUMICAP® Sensor for
excellent accuracy and stability
• High tolerance of chemicals
• Graphical display of measurement
trends and one-year history
• Corrosion resistant metal IP65
housing
• NIST traceable (certificate included)
• Application examples: cleanrooms,
pharmaceutical processes,
greenhouses, swimming halls,
museums and archives
The HMT331 is the state-of-the-art wall-mount humidity instrument.
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
• A wider variety of output humidity
parameters
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 measurement history is especially
useful in stability rooms and archives.
The minimum and maximum values for
the previous year can be viewed.
The display shows measurement trends and
up to one year measurement history.
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.
Technical Data
Temperature measurement range
-40 ... +60 °C (-40 ... +140 °F)
Accessories
215005
PC software + cable
USB-RJ45 Serial Connection Cable 219685
211339
Connection cable for HM70
214829
Wall mounting plate (plastic)
215108
Pole installation kit
215109
Rain shield
215094
DIN rail installation set
Dimensions
Dimensions in mm (inches)
P.O. Box 26, FI-00421 Helsinki, Finland
Tel. +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com
HMT333 Humidity and Temperature Transmitter
for Ducts and Tight Spaces
Features/Benefits
• For remote probe installations in
demanding HVAC applications
• Vaisala HUMICAP® Sensor for
excellent accuracy and stability
• High tolerance of chemicals
• For temperatures -40 ... +80 °C
(-40 ... +176 °F) or -40 ... +120 °C
(-40 ... +248 °F)
• Small thermal mass - fast response to
temperature changes
• Graphical display of measurement
trends and one-year history
• Corrosion resistant IP65 housing
• NIST traceable (certificate included)
• Application examples: cleanrooms,
pharmaceutical processes,
greenhouses, environmental chambers
The HMT333 transmitter has a small probe for remote applications.
The Vaisala HUMICAP® Humidity and
Temperature Transmitter HMT333 is
a versatile instrument for applicatons
where a small remote probe is needed.
Flexible installation
To install the probe in ducts, channels
and through walls, an installation kit is
available with an aluminum flange, leadthrough piece, and steel support bar.
Technical Data
Temperature measurement range
-40 ... +80 °C (-40 ... +176 °F) or
-40 ... +120 °C (-40 ... +248 °F)
Accessories
210697
Duct installation kit
Cable gland
HMP247CG
215005
PC software + cable
USB-RJ45 Serial Connection Cable 219685
211339
Connection cable for HM70
214829
Wall mounting plate (plastic)
215108
Pole installation kit
215109
Rain shield
Solar radiation shield
DTR502B
215094
DIN rail installation set
Dimensions
Dimensions in mm (inches) below
For moderate humidities
and temperatures
The HMT333 is typically used in
demanding HVAC applications such as
cleanrooms, pharmaceutical processes,
and greenhouses, or in processes of
moderate temperature.
For environments with continuously
high humidity, the HMT337 with a
warmed, vapor-tight and stainless steel
probe is recommended.
M9x1
Ø 12 (0.47)
HMT333 has two probe cable options
available, a flexible one that withstands
heat up to +80° C, and a durable cable
that withstands heat up to +120° C. Both
cable options are available in lengths of
2, 5, and 10 meters.
For outdoor environments, the
DTR502B solar radiation shield provides
protection for the probe. The shield can
be installed on a pole, a beam or a flat
surface.
37.5 (1.48)
78.5 (3.09)
Duct installation kit
98.5 (3.88)
P.O. Box 26, FI-00421 Helsinki, Finland
Tel. +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com
HMT334 Humidity and Temperature Transmitter
for High Pressure and Vacuum Applications
Features/Benefits
• For pressures up to 100 bar and
vacuum applications
• For temperatures -70 ... +180 °C
(-94 ... +356 °F)
• ISO and NPT threads available
• Vaisala HUMICAP® Sensor for excellent
accuracy and stability
• Graphical display of measurement
trends and one-year history
• Corrosion resistant IP65 housing
• NIST traceable (certificate included)
• Application example: test chambers
The HMT334 is ideal for permanent installations into pressurized or vacuum processes.
The Vaisala HUMICAP® Humidity and
Temperature Transmitter HMT334
is designed to measure humidity in
pressurized spaces or vacuum chambers.
Each probe is tested to ensure a gas and
vacuum tight installation.
Using a serial line, the measurement
data can be transferred to a PC where it
can be further processed and copied to
other programs.
Vaisala HUMICAP®
performance
The HMT334 incorporates Vaisala’s
more than 30 years of experience in
industrial humidity measurement.
The sensor provides accurate and
reliable measurement and is immune
to particulate contamination and most
chemicals.
M22×1.5 or
NPT 1/2"
The HMT330 series features a numerical
and graphical display. The user can easily
monitor operational data, measurement
trends and up to one-year history.
The display shows minimum and maximum
values for up to one year.
ø12 (0.47)
Graphical display of
measurement trends and
real time history
Technical Data
Temperature measurement range
-70 ... +180 °C (-94 ... +356 °F)
Operating pressure
0 ... 10 MPa (0 ... 100 bar)
Accessories
17223
Fitting body ISO M22 x 1.5
Fitting body NPT 1/2”
17225
215005
PC software + cable
USB-RJ45 Serial Connection Cable 219685
211339
Connection cable for HM70
214829
Wall mounting plate (plastic)
215108
Pole installation kit
215109
Rain shield
215094
DIN rail installation set
Dimensions
Dimensions in mm (inches)
41 (1.61)
120 (4.72)
170 (6.69)
P.O. Box 26, FI-00421 Helsinki, Finland
Tel. +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com
HMT335 Humidity and Temperature Transmitter
for High Temperatures
Features/Benefits
• For temperatures -70 ... +180 °C
(-94 ... +356 °F)
• Long metal probe head
• Stainless steel installation flange
available
• Adjustable installation depth
• Vaisala HUMICAP® Sensor for
excellent accuracy and stability
• Graphical display of measurement
trends and one-year history
• Corrosion resistant IP65 housing
• NIST traceable (certificate included)
• Application example: hot drying
processes
The HMT335 has a robust stainless steel probe ideal for high flow rates in hot processes.
Robust probe ideal for high
flow rates
The HMT335 is ideal for duct
measurements as the probe
tolerates mechanical stress and
withstands high flow rates. The HMT335
can be used, for example, in a hot drying
process.
Graphical display of history
and measurement trends
The HMT335 features a numerical and
graphical display. The user can easily
monitor operational data, measurement
trends and one-year measurement
history.
Vaisala HUMICAP®
performance
The sensor provides accurate and
reliable measurement and is immune
to particulate contamination and most
chemicals.
41 (1.6)
51 (2.0)
Technical Data
Temperature measurement range
-70 ... +180 °C (-94 ... +356 °F)
Accessories
Mounting flange
210696
PC software + cable
215005
USB-RJ45 Serial Connection Cable 219685
211339
Connection cable for HM70
214829
Wall mounting plate (plastic)
215108
Pole installation kit
215109
Rain shield
215094
DIN rail installation set
Dimensions
Dimensions in mm (inches)
ø13.5 (0.53)
The Vaisala HUMICAP® Humidity and
Temperature Transmitter HMT335 has
a long stainless steel probe designed for
high temperatures.
192 (7.56)
253 (9.96)
The installation flange allows an adjustable
installation depth for the probe.
P.O. Box 26, FI-00421 Helsinki, Finland
Tel. +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com
HMT337 Humidity and Temperature Transmitter
for High Humidity Applications
Features/Benefits
• For high-humidity applications in
industry and meteorology
• Warmed probe for superior
performance in condensing
environments
• Small, stainless steel, vapor-tight
remote probe
• For temperatures -70 ... +180 °C
(-94 ... +356 °F)
• Vaisala HUMICAP® Sensor for excellent
accuracy and stability
• High tolerance of chemicals
• Graphical display of measurement
trends and one-year history
• Corrosion resistant IP65 housing
• NIST traceable (certificate included)
The HMT337 is the ideal transmitter for the most demanding process and
meteorological measurements.
True humidity readings in
conditions of condensation
If the relative humidity value is
needed, an additional temperature
sensor is used. The measured ambient
temperature provides the compensation
for calculating relative humidity and
other humidity parameters.
Many ways to install
A tight installation through a process
wall can be achieved with Swagelok®
fittings. Meteorological installation
kits for outdoor installations and duct
installation kits are also available.
ø 12 (0.47)
The Vaisala unique warmed probe
provides fast and reliable measurement
in environments where humidity is
near saturation. The warming prevents
condensation from forming on the
sensor.
As the probe is warmed, the humidity
level inside it stays below the ambient
level. With accurate temperature
measurement, the ambient dewpoint
can be calculated precisely.
Technical Data
Temperature measurement range
-70 ... +180 °C (-94 ... +356 °F)
Accessories
Cable gland and AGRO
HMP247CG
Duct installation kit
(RH probe)
210697
Duct installation kit
(T probe)
215003
Swagelok fittings (NPT and ISO) for both
RH and T probes
Solar radiation shield
DTR502B
Meteorological inst. kit
HMT330MIK
215005
PC software + cable
USB-RJ45 Serial Connection Cable 219685
211339
Connection cable for HM70
214829
Wall mounting plate
(plastic)
215108
Pole installation kit
215109
Rain shield
215094
DIN rail installation set
Dimensions
Dimensions in mm (inches)
Duct installation kit
M9×1
The Vaisala HUMICAP® Humidity and
Temperature Transmitter HMT337 is
delivered in one of three configurations:
• Basic: non-warmed probe for
moderate humidities
• With a warmed probe: for nearcondensing conditions and
dew point measurement
• With a warmed probe and an
additional temperature sensor: for
near-condensing conditions and
relative humidity measurement
37.5 (1.48)
79.5 (3.13)
99.5 (3.92)
P.O. Box 26, FI-00421 Helsinki, Finland
Tel. +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com
HMT338 Humidity and Temperature Transmitter
for Pressurized Pipelines
Features/Benefits
• Installed through ball valve
- can be inserted and removed while
the process is running
• Adjustable probe depth
• Pressure tolerance 40 bar
• For temperatures -70 ... +180 °C
(-94 ... +356 °F)
• Vaisala HUMICAP® Sensor for
excellent accuracy and stability
• Graphical display of measurement
trends and one-year history
• Corrosion resistant IP65 housing
• Two probe lengths available
• NIST traceable (certificate included)
The HMT338 is ideal for installations in pressurized processes where the probe needs to be
removed while the process is running.
The Vaisala HUMICAP® Humidity and
Temperature Transmitter HMT338 is
designed for pressurized processes.
Insert or remove probe
while the process is running
With “hot tapping”, the probe is inserted
directly into the process while it is
running, without the need for venting or
lowering the process pressure.
The probe is screwed into a ball valve
assembly that has been fixed to the
process pipe or wall. The adjustable hex
nut is hand-tightened to temporarily
hold the probe to the process. Then the
probe is pushed down to the appropriate
depth. The hex nut is tightened with a
wrench to lock the probe in its place.
Hot tapping is possible in pressures up
to 10 bar.
Graphical display of history
and measurement trends
From the display, the user can easily
monitor operational data, measurement
trends and one-year measurement
history.
Vaisala HUMICAP®
The HMT338 incorporates Vaisala’s
more than 30 years of experience in
industrial humidity measurement.
The sensor provides accurate and
reliable measurement and is immune
to particulate contamination and most
chemicals.
Technical Data
Temperature measurement range
-70... +180 °C (-94 ... +356 °F)
Operating pressure
0... 4MPa (0... 40 bar)
Accessories
Ball valve set
BALLVALVE-1
Pressure fitting ISO 1/2 to
NPT 1/2
210662
215005
PC software + cable
USB-RJ45 Serial Connection Cable 219685
211339
Connection cable for HM70
214829
Wall mounting plate
(plastic)
215108
Pole installation kit
215109
Rain shield
215094
DIN rail installation set
Dimensions
Dimensions in mm (inches)
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