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 (U_in24 VDC)
     RS-232
     U_out2 x 0 ... 1 V/ 0 ... 5 V/
     0... 10 V
     I_out2 x 0 ... 20 mA V
Analog outputs
     current output
     voltage output
Digital outputs

Ethernet interface (optional)
     Supported standards
     Connector
     Protocols
WLAN interface (optional)
     Supported standards
     Antenna connector type
     Protocols
     Security
Authentication / Encryption
     Open / no encryption
     Open / WEP
     WPA Pre shared key / TKIP
     WPA Pre shared key / CCMP (a.k.a. WPA2)

Optional data logger with
real-time clock
     Logged parameters
     Logging interval
     Max. logging period
     Logged points
     Battery lifetime
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)


10/100Base-T
RJ45
Telnet

802.11b
RP-SMA
Telnet
WEP 64/128,WPA









max. three with trend/min/max values
10 sec (fixed)
4 years 5 months
13,7 million points per parameter
min. 5 years
English, French, Spanish, German, Japanese, Russian, Swedish, Finnish, Chinese

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)

Calibration services

Calibrated quantities
Traceability

relative humidity, temperature
NIST

Calibration services are available at Vaisala service centers for a fixed price.
-Accredited calibrations (ISO17025)
-Factory calibrations (ISO9001)

Calibration price includes:
-calibration and certificate before adjustment
-adjustment to meet specifications
-calibration and certificate after adjustment
-replacement of wearing parts

Spare parts

Common spare and wearing parts are available. For availability contact sales.

Repair

Repair services are available at Vaisala service centers for a fixed price.

Repair price includes:
-repair work
-required parts
-calibration certificate
-service report

Technical support

Technical support for your installed units, contact helpdesk@vaisala.com.