Humidity and Temperature Transmitter for Intrinsically Safe Applications

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  • Humidity
  • Temperature


The EE300Ex humidity and temperature transmitter is dedicated for measurement in explosion hazard areas. It complies with the classifications for Europe (ATEX), International (IECEx), USA / Canada (FM), China (NEPSI) and Korea (KCs) and can be employed in gas and dust explosion hazard areas. The intrinsically safe EE300Ex can be installed in the explosion hazard area even in zones 0 / 20 (Divison 1).

  • EE300Ex Intrinsically Safe Humidity / Temperature Transmitter with remote sensor probe

  • EE300Ex Intrinsically Safe Humidity / Temperature Transmitter for wall mounting

    The 2-part enclosure facilitates easy installation and dismounting for calibration without time-consuming wiring. The robust and easy-to-clean stainless steel housing is optimized for the pharmaceutical and chemical industries. The well proven E+E humidity sensor technology grants reliable, long-term stable measurements in challenging applications.

    Besides measurement of relative humidity and temperature, the EE300Ex calculates all humidity related parameters, such as dew-point temperature [Td], wet-bulb temperature [Tw], absolute humidity [dv], etc. The intrinsically safe humidity and temperature transmitter features two 4-20 mA outputs in 2-wire technology.

    Moisture in oil measurement

    In the same way as humidity measurement in air, the EE300Ex is appropriate for moisture in oil measurement. The moisture content of oil can be issued absolute as water content in [ppm] or relative as water activity [aw]. Typical applications for moisture in oil measurement are found in systems for cleaning/drying oil or on oil platforms for online monitoring of lubrication and gear oils.

    Typical applications

    • Chemical industry
    • Pharmaceutical industry
    • Painting cabinets
    • Explosion hazard storage rooms
    • Power stations
    • Grain mills
    • Oil platforms
    • Moisture in oil measurement

    Key Features

    • For gas and dust applications
    • Direct mounting in zones 0 / 20
    • All humidity related physical quantities
    • Best precision up to 180°C (356 °F)
    • Pressure-tight up to 20 bar (290 psi)
    • Wall mount or remote probe versions
    • Water content and water activity in oil

    Technical data

    Measuring range
    0-100% RH
    -40...180 °C (-40…356 °F)
    ±1.3% RH
    ±0.2 °C (±0.36 °F)
    Pressure range
    0.01...20 bar (0.15…290 psi)
    4-20 mA (2-wire)
    24 V DC

    Calibrating your limits

    Your products and services can only be as precise as the tools you use to measure them. With more than 20 years of experience, the calibration team of E+E Elektronik focuses on providing a reliable service without any unnecessary delays or bias.

    Discover the value of working with an expert in calibration that prioritizes

    • accuracy,
    • fastness and
    • reliability

    Learn more

    Related products


    Downloads EE300Ex


    Transmitter with "two-wire" technology receive the power from the process, and the signal is carried on return wire (closed current loop). With "three-wires" technology the power supply is separate from current output: 2 wires are the power supply and the third carries the signal.

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