HomeAbout UsProductsContact Us

Humidity transmitter - Advanced

Vaisala HMT330 series are easy-to-use transmitters for demanding industrial and air conditioning applications. The transmitters measure relative humidity and temperature and from these calculate dew point and wet bulb temperature, mixing ratio and absolute humidity. They can be configured to the customer's requirements on the production line, but configuration and parameters can also be set by the user. The series has both analogue and serial outputs as well as several options: different cable lengths, power supply modules and serial interface modules as well as a local display.

Technical Specs

Model HMT330
Measurement Range Humidity: 0 - 100% rH
  • HMT331: -40 to 60ºC
  • HMT333: -40 to 80ºC or -40 to 120ºC
  • HMT334/335/337/338: -70 to 180ºC
    Dewpoint, mixing ratio, absolute humidity, wet bult temperature, enthalpy, water vapor pressure
  • Sensor Humidity: Vaisala HUMICAP 180
    Temperature: PT100 RTD
    Accuracy at 20ºC Humidity: ±1.0%rH (0 - 90%rH), ±1.7%rH (90 - 100%rH)
    Temperature: ±0.2ºC
    Power supply 10-35 VDC / 24VAC
    Output 0-20mA, 4-20mA, 0-1V, 0-5V, 0-10V, RS-232, RS-485(optional)
    Mechanics Protection: IP65 (NEMA 4)
    Display: One line, changing or fixed variables
    Remarks HMT331 for wall mounting
    HMT333 for duct mounting and tight spaces
    HMT334 for high pressures up to 100 bar and vacuum conditions
    HMT335 for high temperatures
    HMT337 for high humidity and meteorological applications
    HMT338 for pressurized pipelines up to 40 bar

    Data sheet

    CatalogueProduct Selection Form

    See also
    Humidity Transmitter for Environmental chambers
    The Vaisala HUMICAP® Humidity Module HMM100 is an open frame module for integration into environmental chambers. The modules provide a single analog output channel for relative humidity (RH) or dewpoi.....
    Humidity & Temperature Transmitter - Wall mounted with display
    The Vaisala HMW90 Series has been complemented with four new models: TMW92 and TMW93 temperature transmitters for applications where only temperature measurement is needed and the configurable HMW90 a.....
    Humidity and Temperature Transmitters for Building Automation Applications
    ​Vaisala INTERCAP® Humidity and Temperature Transmitter Series HMDW80 measure relative humidity and temperature in various building automation applications. Transmitters combine easy installatio.....


    Featured products

    Portable Hydraulic Tester

    Vaisala Anritsu Tokico Sato Sekonic Dickson Isuzu Kobayashi
    Dynasonics Ryutai RCM flowmeter Hedland Flowmeter Flomec