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EE33 is optimised for reliable humidity and temperature measurement in applications with temporary condensation, permanent high humidity or chemical exposure. Condensation on the monolithic humidity sensor and the filter cap is prevented by controlled heating of the sensor.

The measuring principle of EE33 type J with separate humidity and temperature probes and dual heating enables precise continuous measurement even at permanent high humidity.

The remote probe can be employed up to 180°C (356°F) and the pressure tight version up to 100bar. The three-part design of rugged enclosure in polycarbonate or aluminium allows easy mounting and replacement. The measurands are available on two analogue outputs and a serial interface.

An optional relay output can be used for alarms and process control. The proprietary coating protects the sensors and their leads against corrosive and electrically conductive pollution.

Key features

  • Highest measurement accuracy with monolithic humidity sensor
  • Heating modes for temporary condensation, permanent high humidity or chemical exposure
  • Optional module for external triggering of heating mode
  • Short response time and fast recovery after condensing conditions
  • Precise measurement at permanent high humidity
  • Outstanding temperature compensation
  • Sensor protection against pollution and corrosion
  • Rugged aluminium enclosure
  • Pressure tight probe up to 100 bar
  • Process temperature up to 180°C
  • Analogue current and voltage outputs
  • Optional RS-485 and standard RS-232 interface
  • Optional alarm outputs
  • Optional LCD Display
  • Additional physical quantitites calculated
  • Easy field adjustment
  • Outputs freely configurable by user
  • Dew point only type available

Typical applications

  • pharmaceutical and food industry
  • driers for ceramics, wood, concrete, polyester etc.
  • greenhouses, mushroom farms
  • high-humidity storage rooms
  • climate, test and curing chambers
  • meteorology

Technical data

  • 0...100% RH
    -40...180°C (-40...356 °F)

    Measuring range
  • ±1.3% RH
    ±0.2 °C (0.36 °F)

  • < 15s

    Response time
  • RS232C + optional RS485

    Serial interface
  • 0-1/5/10 V or 0/4-20 mA

  • 24V AC/DC


Product inquiry

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  • HA010105

    PTFE Filter


    Material: PTFE sintered
    Pores size: 50 µm
    Length: 33mm (1.30")


    For very dirty, oily environment

    T range: -40...180°C (-40...176°F)
    Response time t10/90: 14s

    Typical applications

    Industrial process control
    Chemical industry
    Very polluted environment
    Unsuitable for condensing environment

    Suitable for Products:

  • HA010114

    PTFE stainless steel filter


    Material: stainless steel
    Filter: PTFE memrane, replaceable
    Pores size: 2 µm
    Length: 39mm (1.54")


    For average mechanical stress
    High pollution levels

    T range: -40…180°C (-40...176°F)

    Response time t10/90: 14s

    Water ingression pressure > 0.5bar

    Typical applications

    Continuous high humidity
    Condensing environment

    For EE33-J and EE33-K in:



    Suitable for Products:

  • HA010603

    RS232 to RS485 Converter


    • Converter from RS232 to RS485
    • Supports AutoPro, i.e. automaticadjustement of the Baudrate from300 bps to 115200 bps
    • Enables to control 256 data acquisitionmodules in a RS-485 network
    • Solation 3000 Vrms

    Suitable for Products:

  • HA010301

    RS232 Interface Cable for Screw Terminals


    • RS232 interface cable for connection to screw terminals on the board
    • cable length: 2m (6.6ft)




    Suitable for Products:

  • HA010304

    RS232 Interface Cable with Pin Connector


    • RS232 interface cable to connect directly on the board
    • cable length: 2m (6.6ft)



    Suitable for Products:

  • HA010311

    RS232 Interface Cable with External Plug


    • RS232 interface cable to plug into theexternal socket on the housing C06
    • cable length: 2m (6.6ft)




    Suitable for Products: