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OMS 420 HT

High temperature probe

In-situ probe with heated ZrO2 sensor for wet O2 analysis up to 1700°C, using ejector for sample aspiration through Kanthal or Ceramic tube and remotely mounted transmitter.

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    OMS 420 HT
    • Remote transmitter probe with flow aspiration using ejector and compressed air, for flue gas temperature up to 1700°C.
    • 4"ANSI 150lbs or DN80 PN16 flange with Ø 27mm probe tube of Inconel steel, Kanthal steel or ceramic tube for different temperatures and with different lengths.
    • Reference air inlet through natural difusion, no separate air pump is required.
    • Rugged industrial plug for power supply and cable data transfer (analog 4-20 mA galvanic isolated, digital RS 485 with Modbus RTU protocol)
    • Available OPTIONS like:
    • COe- combustibles gas measurement
    • Back-purge using compressed air, with solenoid valve control by transmitter electronics, incl. user adjustable purging intervals - recommended for high dust sites -
    • Automatic calibration for span and offset using pneumatic unit PU 420
    Measuring ranges
    COe0 ... 1.000 ppm COe (combustibles gas) 
    O20,1 … 25 % (user setable analog output range) 
    Fluegas temperatureup to 1100°C with Inconel steel tube
    up to 1300 °C with Kanthal steel tube
    up to 1700°C with Ceramic tube 
    Dimensions and other data
    Data transmissionanalog 4-20mA, galvanic isolation
    digital RS485, galvanic isolation 
    Transmitterwith local microprocessor, display and 4 push-buttons, 2 channel analog output 4-20mA and RS485 Modbus RTU, all galvanic isolated 
    Flange4" ANSI 150lbs, Ø 230 mm, probe tube: Ø 27 mm, max. 2m length
    DN80 PN16, Ø 216 mm / probe tube: Ø 27 mm, max. 2m length
    Mounting flange temperature between +70°C and +150°C 
    Response time< 10 sec
    Power supply100...240Vac / 100W 
    Protection classIP65 
    Download File type File size


    Brochure OMS 420
    PDF 574 KB Download