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HMT330 Series Humidity and Temperature
Transmitters for Industrial Applications
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The HMT330 transmitter family has the solution for demanding industrial humidity
measurements. |
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• 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
• Graphical display of measurement
trends and one-year history
• Multiligual user interface
• Excellent performance in harsh
chemical concentrations
• Corrosion resistant IP65 housing
• NIST traceable (certificate included)
For Pricing Call Toll Free - 877-215-9090 |
The Vaisala HUMICAP° Humidity and Temperature Transmitter Series HMT330 is designed for demanding industrial applications where stable measurement and wide customization is important.
HMT331 Humidity and Temperature Transmitter
for Demanding Wall-Mounted Applications
HMT333 Humidity and Temperature Transmitter
for Ducts and Tight Spaces
HMT334 Humidity and Temperature Transmitter
for High Pressure and Vacuum Applications
HMT335 Humidity and Temperature Transmitter
for High Temperatures
HMT337 Humidity and Temperature Transmitter
for High Humidity Applications
HMT338 Humidity and Temperature Transmitter
for Pressurized Pipelines
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The HMT330 series incorporates Vaisala's 30 years of experience in industrial humidity measurement. The sensor measures accurately and reliably and is immune to particulate contamination and most chemicals.
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.
 The HMT330 can be ordered with a large numerical and graphical display allowing the user to easily monitor measurement trends and one-year history.
The display shows measurement trends and history up to one year.
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The recorded measurement data can be viewed on the display or transferred to PC with Microsoft Windows® software.
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. RS-232, RS-485, or relay outputs can be used for digital communication.
The HMT330 instruments are calibrated 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.
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- Performance
- Operating Environment
- Inputs & Outputs
- Mechanics
- Dimensions
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Measurement range
Accuracy at +20 °C (68 °F)
Sensor |
0 ... 100 % RH
± 1.0 % RH (0 ... 90 % RH)
± 1.7 % RH (90 ... 100 % RH)
Vaisala HUMICAP® 180
Vaisala HUMICAP® 180R |
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Measurement range
HMT331
HMT333
HMT334/335/337/338
Accuracy at +20 °C (68 °F)
Sensor |
-40 ... +60 °C (-40 ... +140 °F)
-40 ... +80 °C or -40 ... +120 °C
(-40 ... +176 °F or -40 ... +248 °F)
-70 ... +180 °C (-94 ... +356 °F)
± 0.2 °C
PT100 RTD 1/3 Class B IEC 751
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Dewpoint, temperature, mixing ratio, absolute humidity, wet bulb temperature, enthalpy, water vapor pressure. |
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Temperature
for probe
for transmitter body
with display
Pressure
HMT334
HMT338
HMT333/335/337 |
same as measurement ranges
-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
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Operating voltage
with optional power supply module
Power consumption @ 20 °C (Uin 24 VDC)
RS-232
Uout 2 x 0 ... 1 V/ 0 ... 5 V/
0... 10 V
Iout 2 x 0 ... 20 mA V
Analog outputs
current output
voltage output
Digital outputs
Menu languages |
10 ... 35 VDC, 24 VAC
100 ... 240 VAC 50/60 Hz
max. 25 mA
max. 25 mA
max. 60 mA
0 ... 20 mA, 4 ... 20 mA
0 ... 1 V, 0 ... 5 V, 0 ... 10 V
RS-232, RS-485 (optional)
English, French, Spanish, German, Japanese, Russian, Swedish, Finnish |
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Probe cable diameter
HMT333
other probes
Material (housing)
Housing classification |
6.0 mm
5.5 mm
G-AlSi 10 Mg (DIN 1725)
IP65 (NEMA 4)
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