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HMT120/130 Humidity and Temperature Transmitters for Cleanrooms and Light Industrial Applications

Vaisala HUMICAP® Humidity and Temperature Transmitters HMT120 and HMT130 for Duct and Wall Mount
Vaisala HUMICAP 40 Years!

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    The Vaisala HUMICAP® Humidity and Temperature Transmitters HMT120 and HMT130 are designed for humidity and temperature monitoring in cleanrooms and are also suitable for demanding HVAC and light industrial applications.

    • Vaisala HUMICAP® technology with humidity sensor HUMICAP® 180R
    • Humidity parameter options: relative humidity, dew point/frost point, wet bulb temperature, enthalpy, absolute humidity, mixing ratio, vapor pressure, and saturation vapor pressure
    • 2-wire loop-powered or 3-wire voltage output configurations
    • Interchangeable probe (easy field calibration)
    • Accurate and reliable
    • Resistant to dust and most chemicals
    • Optional LCD display
    • USB cable available for a PC connection for maintenance
    • Wall-mounted or with a remote probe
    • Can be mounted outdoors using a Vaisala installation kit and the Vaisala Radiation Shield DTR502B
    • Enclosure IP65
    • Suitable for cleanrooms and demanding HVAC applications
    Technical Specifications

     Technical Specifications

    Relative humidity

    ​Measurement range ​0 ... 100 %RH

    ​Accuracy including non-linearity, hysteresis, and repeatability
       at 0 °C ... +40 °C ​

    ​0 ... 90 %RH
    ​±1.5 %RH
    ​90 ... 100 %RH
    ​±2.5 %RH

    ​   at -40 °C ... +0 °C and at +40 °C ... +80 °C ​
    ​​0 ... 90 %RH
    ​±3.0 % RH
    ​9​0 ... 100 %RH
    ​±4.0 % RH
    ​Factory calibration uncertainty at +20 °C (+68 °F) ​
    ​0 ... 90 %RH
    ​±1.1 % RH
    9​0 ... 100 %RH
    ​±1.8 % RH

    ​Humidity sensor ​Vaisala HUMICAP® 180R
    ​Stability                 ​±2 %RH over 2 years


    ​Measurement range ​-40 ... +80 °C 

    ​Accuracy over temperature range
       at +15 °C ... +25 °C

    ±0.2 °C
    ​   at 0 ... +15 °C and at +25 °C ... +40°C​±0.25 °C
    ​   at -40 °C ... +0 °C and at +40 °C ... +80 °C​±0.4 °C

    ​Temperature Sensor

    Operating temperature range
       transmitter body, no display
       transmitter body, with display
       HMP110 probe
    Storage temperature range
    Electromagnetic compatibility

    ​Pt1000 RTD Class F0.1 IEC 60751

    -40 °C ... +60 °C
    -20 °C ... +60 °C
    -40 °C ... +80 °C
    -50 °C ... +70 °C
    EN 61326-1
    and EN 55022

    Inputs and outputs

    ​Current output signals​4 ... 20 mA
    ​External loop voltage
    ​10 ... 30 VDC (RL= 0 ohms)
    20 ... 30 VDC (RL< 500 ohms)
    ​Voltage output signals​0 ... 1 V,
    0 ... 5 V,
    0 ... 10 V or
    user defined
    between 0 ... 10 V
    ​Min output resistance​1 kohm
    ​Serial output​RS485, non-isolated
    ​Relay output​1 relay (max. 50 VDC, 200 mA)
    ​Supply voltage

    ​10 ... 35 VDC
    15 ... 35 VDC (when output 0 ... 10 V)
    24 VAC (±20 %)
    ​Current consumption at 24 VDC​8 mA, if relay closed 15 mA


    Max. additional error caused by the analog outputs after calibration at
    +20 °C ambient temperature

    ±0.1 % of FS output signal

    Temperature dependence of the analog outputs

    ±0.005 % of FS output signal



       transmitter housing
       display window
    PBT plastic
    PC plastic

       probe body
    Stainless steel (AISI 316)

       probe grid filter
    Chrome coated ABS plastic

    Housing classification


       inputs and outputs
    Screw terminals 0.5 ... 1.5 mm2

       probe interface

    Probe cable length
    Display (optional)

    Weight (including probe)
    4-pin M8 female panel connector
    3 m, 5 m, 10 m - up to 50 m
    128 x 64 resolution full graphics
    B&W display without backlight
    270 g


    Humidity and temperature probe

    Humidity and temperature replacement probe

    Constant output probe

    Humidity sensor

    Probe mounting flange

    Probe mounting clamps, 10 pcs



    HUMICAP® 180R


    HMP110 sensor protection

    ​   plastic grid filter

    ​   plastic grid with membrane filter
       stainless steel sintered filter

    ​Probe cable 3 m HMT120Z300

    ​Probe cable 5 m ​HMT120Z500

    ​Probe cable 10 m
    Radiation shield
    Rain shield with installation kit
    Duct installation kit
    HMI41 connection cable
    HM70 connection cable
    USB serial interface cable

    *See separate order form

    For complete specifications, please see the brochure or manual in "Documents".

    Related Services
    • Warranty 
    • All Vaisala products and services are covered by a 12-month warranty as standard, with selected products covered for up to 24 months. During this period you benefit from free repair or replacement of faulty equipment. With Vaisala’s extended warranty, you get free repair or replacement for five years.
    • On-Site Calibration 
    • On-site calibration helps you maximize both reliability and profitability by minimizing costly equipment downtime and ensuring compliance with relevant regulations and standards. Our expert engineers can also replace a range of components, carry out minor repairs, and provide the latest upgrades.
    • Repair Services 
    • Vaisala repair services include fault tracing and repair or replacement of failed components, as well as final testing to ensure your equipment is functioning properly. Repairs can be carried out on site or at one of our service centers.
    • Service Center Calibration 
    • Regular calibration ensures that your Vaisala equipment continues to provide accurate, high-quality data. We offer traceable, standards-compliant calibration services for almost all Vaisala products and partner with world-class couriers for rapid, trouble-free return of your equipment.
    • Spare Parts 
    • Get rapid access to the spare parts you need to maximize the uptime of your equipment and ensure reliable and accurate operation. In addition to standard spare part delivery, we also offer an express service where parts are shipped within one business day.