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HMT330 Series Humidity and Temperature Transmitters for Industrial Applications


 
Vaisala HMT330
The HMT330 transmitter family has the solution for demanding industrial humidity measurements.

 

 

• 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

 

Vaisala HUMICAP® performance
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.

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
Vaisala DisplayThe 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.

  

Data collection and transfer to PC
The recorded measurement data can be viewed on the display or transferred to PC with Microsoft Windows® software.

Many ways to install
Mains and DC power options, and several mounting accessories make the instrument easy to install.

Versatile outputs
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.

Flexible calibration
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.

 

 

 

  • Performance
  • Operating Environment
  • Inputs & Outputs
  • Mechanics
  • Dimensions

Relative humidity measurement

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

Temperature measurement

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

Other variables available (depends on model)

Dewpoint, temperature, mixing ratio, absolute humidity, wet bulb temperature, enthalpy, water vapor pressure.

Operating environment

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

 

Inputs and outputs

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

 

Mechanics

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)

Dimensions in mm (inches)

 

 

 
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Industrial Instrumentation Services, Inc.
1400 Rahway Avenue, Suite 4 • Avenel, NJ • 07001-2214
Phone: 732-815-9090 • Fax: 732-815-9092
Toll Free: 877-215-9090

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