473-SH2 Model

High Performance Chilled Mirror Hygrometer

Cost-Effective Humidity and Temperature Reference Hygrometer for Climatic Chambers or Humidity Generators

Our MBW 473-RP2 is a probe type dew point mirror that is suitable for insertion in to test chambers or environments with moving air.  It is particularly well suited for use in relative humidity generators where it functions as a calibration transfer standard for dew/frost point, relative humidity and temperature.  The 473 can be used to calibrate the RH generator (e.g. before and after on-site tests) or act as the reference during the calibration of RH probes.

The 473-RP2 includes precise measurement of temperature with a 3 x 40mm platinum resistance thermometer (PRT) that can be mounted directly to the RP2 measuring head. Using a cable supplied as standard, the PRT can also be mounted on to instrument under test (IUT) in RH calibration scenarios.  This ensures that the temperature used to calculate RH is correct by minimizing the effects of temperature gradients or self-heating of the IUT.


    • Probe type dew point mirror hygrometer
    • Cable mounted
    • Integrated temperature probe
    • User replaceable optical components
    • Easy mirror access for cleaning


    Measuring Ranges:
    Frost/Dew Point -20…+70 °C
    Relative humidity 5…99 %rh *
    Temperature -50…+100 °C **

    Frost/Dew point ≤ ± 0.15 °C
    Temperature ≤ ± 0.07 °C

    Frost/Dew point ≤ ± 0.05 °C
    Temperature ≤ ± 0.03 °C

    * Please note the operating conditions: The measuring head as well as the connectors must be operated under non-condensing conditions.

    ** The maximum temperature of the RP2 measuring head is 80 °C, so to measure temperature up to 100 °C requires the temperature probe to be cable mounted.

    In combination with the T12 multichannel thermometer, the 473 is particularly well suited to climatic chamber validation projects.

    For a complete range of options and accessories, please contact us.


    Americas +1 713.947.9591
    EMEA +49 69 20436910
    China/APAC +86 400 086 0106


    Ideal for climatic chamber validation to IEC60068, weather station calibration, RH generator transfer standard, and engine test cells


    • RH generator calibration
    • Climatic chamber validation
    • Relative humidity (RH) calibration
    • RH generator transfer standard


    Measuring Head RP2 Part No. Part No. 105000

    The RP2 dew point measuring head has a two-stage Peltier element in a compact probe format and includes a connection for temperature measurement. It is supplied with a calibrated head mounted temperature probe and an extension cable to enable optimum placement in working volumes.  RP2 is suitable for direct insertion into applications with moving air such as relative humidity generators, climatic chambers, manufacturing processes and air ducts.

    Process Insights_MBW_473_Model RP2 Measuring Head

    Other 473 Model Options

    Process Insights MBW Model 473-RP2-2020


    For direct insertion into test conditions with moving air

    Process Insights MBW Model 473-SHX-2020


    For high temperature applications

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