EE33

用于高湿及化学污染环境的温湿度变送器

EE33系列变送器是一款专为应用在高温、高湿、污染和结露等苛刻环境中准确测量温湿度而设计的高端工业变送器。

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无论是短时的环境结露,还是工艺过程中有严重的化学污染,甚至测量环境达到100bar压力和持续的高温,EE33系列变送器都能快速、准确地测量被测气体中的温度、相对湿度、露点温度、湿球温度、水蒸气分压力、混合比、绝对湿度和热焓这8个参数。

EE33系列多种规格的温湿度变送器可以应用于以下工况:

  • 在暂时性结露过程中测量相对湿度:
    测量元件被短暂强烈加热
  • 在持续高湿环境中测量露点温度:
    测量元件被控制并持续加热
  • 在持续高湿环境中测量露点温度:
    测量元件被控制并持续加热,同时附加另外一只温度敏感元件对环境温度进行精密测量
  • 在严重化学污染和一般湿度环境中测量相对湿度:
    测量元件被短暂强烈加热
  • 在高达100bar压力和一般湿度环境中测量相对湿度:
    测量元件被安装在特殊的高压探头中

EE33系列变送器的核心是在测量探头中安装了E+E最新研发的带加热功能的湿度敏感元件-HMC1,这种集成电路结构形式的湿敏元件能有效提高变送器在高湿环境中测量的持续性和准确性,当探头表面结露或被化学污染时,变送器主电路板可以对测量元件进行快速强烈加热,将HMC1元件表面的化学污染物和露水迅速蒸发;此外E+E特殊的敏感元件镀膜工艺,可以对HMC1敏感元件进行镀膜处理,使其能更有效地对抗腐蚀性物质和导电介质对元件表面的侵蚀。

利用随机提供的配置软件,用户可设定变送器工作模式、敏感元件加热模式、选择输出参数和信号类型。

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技术资料 EE33

  • 0...100% RH
    -40...180°C

    工作范围
  • ±1.3% RH
    ±0.2 °C

    精度
  • 响应时间
  • RS232C + RS485选项

    串口
  • 0-1/5/10 V 或 0/4-20 mA

    输出
  • 24 V DC

    供电

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EE33 配件

  • HA010105

    PTFE Filter

    Construction

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

    Features

    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

    Construction

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

    Features

    For average mechanical stress
    High pollution levels

    T range: -40…180°C (-40...176°F)Response time t10/90: 14sWater ingression pressure > 0.5bar

    Typical applications

    Continuous high humidity
    Condensing environment

    For EE33-J and EE33-K in:
    Meteorology

     

    Suitable for Products:

  • HA010603

    RS232 to RS485 Converter

    DESCRIPTION

    • 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

    DESCRIPTION

    • 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

    DESCRIPTION

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

    Suitable for Products:

  • HA010311

    RS232 Interface Cable with External Plug

    DESCRIPTION

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

    Suitable for Products:

EE33 FAQ

  • What is the difference between a 2 wire and a 3 wire current output?

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

     

  • How often should I calibrate or readjust my E+E RH measuring device?

    The calibration / adjustement interval depend from the application and from the requirements of the specific industry. See also "Princibles of Humidity measurement".

     

  • Can E+E supply an accredited calibration certificate together with the measurement device?

    The product data sheet indicates if and what type of inspection certificate is included in to standard scope of supply. Most of the E+E measurement devices feature an inspection certificate according to DIN EN 10204-3.1 or DIN EN 10204-2.2. An accredited calibration certificate is available on request, see the E+E scope of accreditation at our calibration website

     

  • The probe of the RH sensor is installed into separation wall and seems to be out of specs. Why?

    Temperature gradients along the sensing probes lead to relevant measurement errors. Whenever possible, install the entire probe inside the space to be monitored. If the probe is installed into a separation wall, make sure to isolate thermally the part of the probe looking out of the wall at the cable side.

     

  • What is the influence of coating on the response time?

    Response time of a humidity sensor protected by the E+E proprietary coating is slightly longer than the response time without coating. Please see the data sheet of the specific sensor.

     

  • When does coating not help?

    Coating does not help again chemicals in gazeous form. Contact an E+E sales representative for details on the influence of certain chemicals onto the humidity sensing elements.

     

  • When does coating help?

    The E+E propritary Coating helps in dirty, dusty and corrosive environment. salts, off-shore applications). It improves the sensor’s long term stability in dusty, dirty or oily applications by preventing stray impedances caused by deposits on the active sensor surface and on its connecting leads.

     

  • What is the E+E sensor coating?

    The E+E proprietary sensor coating is a protective layer applied to the active surface and leads of the sensing elements. The coating extends the lifetime and the measurement performance of the E+E sensor.

     

  • How can I clean the filter cap of a humidity measuring device?

    How can I clean the filter cap of a humidity measuring device?

     

  • How can I clean the humidity sensing element?

  • Which E+E products are appropriate for high dew point measurement?

    High dew point means the difference between the ambient temperature and the dew point temperature is lower than 3 °C. It corresponds to RH > 85%.

    The appropriate product is the EE33-K. The device features a heated sensing element.

     

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