HMT330 Series Humidity and Temperature Transmitter for demanding humidity measurement


The HMT330 transmitters - the top-of-the-line humidity transmitters for demanding industrial applications. Proven Vaisala HUMICAP technology provides reliable measurements. The large display shows measurements both numerically and graphically. 1-year measurement history is also available.

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

Temperature measurement

 

Measurement range
     HMT331
     HMT333
     HMT334/335/337/338
Accuracy at +20 °C (68 °F)
Sensor


-40 ... +60 °C
-40 ... +80 °C or  -40 ... +120 °C
-70 ... +180 °C
± 0.2 °C
PT100 RTD 1/3 Class B IEC 751

Other variables available (depends on model)

 

Dewpoint, 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)

 

DATASHEET» HMT330.en.pdf (1442kB)
HANDBOOK» HMT330_UserGuide_in_English_01.pdf (2561kB)
HMT331

HMT331 Humidity and Temperature Transmitter for Demanding Wall-Mounted Applications
HMT333

HMT333 Humidity and Temperature Transmitter for Ducts and Tight Spaces
HMT334

HMT334 Humidity and Temperature Transmitter for High Pressure and Vacuum Applications
HMT337

HMT337 Humidity and Temperature Transmitter for High Humidity Applications
HMT338

HMT338 Humidity and Temperature Transmitter for Pressureized Pipelines
HMT335

HMT335 Humidity and Temperature Transmitter for High Temperatures