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In-situ gas analyzers
GM35

For efficient control of combustion and drying processes

Your Benefits

  • Dynamic moisture measurement directly within the process
  • Provision of real moisture reference values
  • Accurate measured values thanks to in-situ measurement
  • Detects fast or transient process deviations
  • Representative measurement by selecting a suitable measuring probe or cross-duct version

Overview

For efficient control of combustion and drying processes

Simultaneous or as individual measurement: the GM35 gas analyzer measures CO2, H2O and CO, or N2O, as well temperature and pressure – and it does this reliably, quickly, and economically. As an in-situ gas analyzer, the GM35 detects these gas components directly in the gas stream without gas sampling. Reliability, precision, and short response time of the GM35 offer a key advantage for efficient control loops in all CO and CO2-generating processes.

At a glance
  • Dynamic humidity correction
  • Fast in-situ measurement directly in the process
  • Simultaneous determination of up to three gas components, temperature, and pressure
  • No gas sampling and conditioning
  • Gas testable version of measuring probe available
  • Integrated self-test and control functions

Accessories

spareparts

Applications

Service & Support

Technical overview

 

Please note: The exact device specifications and performance data of the product may deviate from the information provided here, and depend on the application in which the product is being used and the relevant customer specifications.

  • GM35 system

    GM35 system

    Measured valuesCO, CO2, H2O, N2O
    Performance-tested measurandsCO, CO2, H2O
    Measurement principlesGas filter correlation, Interference filter correlation
    Measuring ranges
    CO0 ... 180 ppm / 0 ... 20,000 ppm
    N2O0 ... 60 ppm / 0 ... 2,500 ppm
    CO20 ... 22.5 Vol.-% / 0 ... 100 Vol.-%
    H2O0 ... 25 Vol.-% / 0 ... 100 Vol.-%
    Measuring ranges refer to 1 m measuring path
    Measuring ranges depend on application and device version
    Certified measuring ranges
    CO0 ... 75 mg/m³ / 0 ... 2,000 mg/m³
    CO20 ... 15 Vol.-%
    H2O0 ... 25 Vol.-%
    The cross-duct and GMP versions have been type-approved
    Zero point drift
    ± 2 %: relative to measuring range end value
    Reference point drift
    ± 2 %: within the maintenance interval, relative to measuring range full scale
    Ambient temperature
    –20 °C ... +50 °C
    Temperature change maximum ±10 °C/h
    Storage temperature
    –40 °C ... +55 °C
    Ambient humidity
    ≤ 96 %
    Relative humidity; bedewing of optical surfaces not permitted
    Conformities

    EN 15267 (MCERTS)

    MCERTS

    Electrical safetyCE
    Enclosure rating
    IP65 / NEMA 4x
    OperationMenu-driven operation via separate control unit
    Model

    Cross-duct version

    Measuring probe version

    Mounting

    Mounting flange, DN125, PN6

    Mounting flange, ANSI, 5″

    Test functionsAutomatic check cycle for zero and span point
  • Sender/receiver unit

    Sender/receiver unit

    DescriptionAnalyzer unit of the measuring system
    Enclosure rating
    IP65 / NEMA 4x
    Dimensions (W x H x D)
    291 mm x 527 mm x 529 mm
    Weight
    29 kg
    Power supply
    Voltage115 V AC / 230 V AC
    Frequency48 ... 62 Hz
    Power consumption≤ 350 W
  • Open measuring probe (GMP)

    Open measuring probe (GMP)

    DescriptionMeasuring probe in open design with integrated purge air control system
    Accuracy
    Pressure sensor1 %
    Temperature sensor1 %
    Process temperature
    ≤ +430 °C
    With N2O measurement max. 180 °C
    Process pressure
    –60 hPa ... 60 hPa
    Depending on purge air supply
    Dust load
    ≤ 3 g/m³
    Based on a 1 m measuring distance, depending on application
    Dimensions (W x H x D)
    See dimensional drawings
    Weight
    See dimensional drawings
    Material in contact with mediaStainless steel 1.4571, stainless steel 1.4539
    Power supply
    Voltage24 V DC
    Supply via control unit
    Auxiliary gas connections
    Purge airHose nozzle 40 mm
    Integrated components

    Pressure sensor

    PT1000 temperature sensor

  • Gas-testable measuring probe (GPP)

    Gas-testable measuring probe (GPP)

    DescriptionMeasuring probe with gas permeable filter element for adjustment with test gas
    Accuracy
    Pressure sensor1 %
    Temperature sensor1 %
    Process temperature
    ≤ +430 °C
    With N2O measurement max. 180 °C
    Process pressure
    –60 hPa ... 200 hPa
    Dust load
    ≤ 30 g/m³
    Based on a 1 m measuring distance, depending on application
    Dimensions (W x H x D)
    See dimensional drawings
    Weight
    See dimensional drawings
    Material in contact with mediaStainless steel 1.4571, stainless steel 1.4539, ceramics, PTFE
    Power supply
    Voltage115 V AC / 230 V AC
    Frequency50 Hz / 60 Hz
    Power consumption≤ 150 W
    Auxiliary gas connections
    Test gasSwagelok 1/4″
    Integrated components

    Pressure sensor

    PT1000 temperature sensor

  • Reflector unit (cross-duct version)

    Reflector unit (cross-duct version)

    DescriptionReflector unit with hollow triple reflector
    Process temperature
    ≤ +500 °C
    With N2O measurement max. 180 °C
    Process pressure
    –60 hPa ... 60 hPa
    Depending on purge air supply
    Dimensions (W x H x D)
    291 mm x 280 mm x 161 mm
    Weight
    9 kg
  • GM35 control unit; sheet steel housing

    GM35 control unit; sheet steel housing

    DescriptionThe control unit serves as the HMI and is responsible for data processing, data output, and control and monitoring functions
    Enclosure rating
    IP65 / NEMA 4x
    Analog outputs3 outputs:
    0/4 ... 20 mA, + 500 Ω
    Electrically isolated
    Analog inputs1 input:
    0 ... 20 mA, 100 Ω
    Digital outputs3 relay contacts:
    + 48 V AC, 1 A, 60 W / 48 V DC, 1 A, 30 W
    Preset for failure, maintenance and functional control
    Digital inputs3 inputs:
    + 24 V
    Serial
    Type of fieldbus integrationRS-232
    FunctionProprietary service interface, connection to SOPAS ET software
    CAN bus
    FunctionInternal system bus
    Indication
    LC display
    Status LEDs: "Power", "Maintenance" and "Failure"
    Input

    Arrow keys

    Functional keys

    OperationMenu-driven operation via LC-display and membrane keyboard
    ModelSteel sheet enclosure
    Dimensions (W x H x D)
    200 mm x 346 mm x 97.5 mm
    Weight
    4.7 kg
    Power supply
    Voltage115 V / 230 V
    Frequency50 Hz / 60 Hz
    Power consumption≤ 50 W
  • GM35 control unit; cast metal housing

    GM35 control unit; cast metal housing

    DescriptionThe control unit serves as the HMI and is responsible for data processing, data output, and control and monitoring functions
    Enclosure rating
    IP67
    Analog outputs3 outputs:
    0/4 ... 20 mA, + 500 Ω
    Electrically isolated
    Analog inputs1 input:
    0 ... 20 mA, 100 Ω
    Digital outputs3 relay contacts:
    + 48 V AC, 1 A, 60 W / 48 V DC, 1 A, 30 W
    Preset for failure, maintenance and functional control
    Digital inputs3 inputs:
    + 24 V
    Serial
    Type of fieldbus integrationRS-232
    FunctionProprietary service interface, connection to SOPAS ET software
    CAN bus
    FunctionInternal system bus
    Indication
    LC display
    Status LEDs: "Power", "Maintenance" and "Failure"
    Input

    Arrow keys

    Functional keys

    OperationMenu-driven operation via LC-display and membrane keyboard
    ModelCast metal enclosure
    Dimensions (W x H x D)
    289 mm x 370 mm x 138 mm
    Weight
    8.6 kg
    Power supply
    Voltage115 V / 230 V
    Frequency50 Hz / 60 Hz
    Power consumption≤ 50 W
  • Connection unit

    Connection unit

    DescriptionFor extending the internal CAN bus connection with a cable provided by the customer
    Dimensions (W x H x D)
    125 mm x 103 mm x 57 mm
    Weight
    3 kg
  • Purge air fixture

    Purge air fixture

    DescriptionFixture to flanges with connections for purge air hose and temperature sensor
    Dimensions (W x H x D)
    320.9 mm x 360 mm x 220 mm
    Weight
    7 kg
    Auxiliary gas connections
    Purge airHose nozzle 40 mm
    Electrical connections

    Flow monitor

    PT1000 temperature sensor

  • Process temperature
    ≤ +500 °C
    Dimensions (W x H x D)
    The dimensions are variable. For details see dimensional drawings.
    Immersion depth
    PT1000 temperature sensor500 mm
    1,000 mm
    1,400 mm
    MaterialStainless steel 1.4571, steel ST37

  • SLV4-2 purge air unit, 2BH1300, 3-ph

    SLV4-2 purge air unit, 2BH1300, 3-ph

    DescriptionUnit to provide dust-free air for flushing of optical surfaces
    Gas flow rate
    38 m³/h ... 63 m³/h
    At 30 hPa counter pressure, depending on low pressure inside the filter
    Ambient temperature
    –40 °C ... +55 °C
    Enclosure rating
    IP54
    Dimensions (W x H x D)
    550 mm x 550 mm x 258 mm
    Weight
    18 kg
    Power supply
    Three-phase currentΔ: 200 ... 240 V, 50 Hz, 2,6 A, 400 W
    Y: 345 ... 415 V, 50 Hz, 1,5 A, 400 W
    Δ: 200 ... 275 V, 60 Hz, 2,6 A, 500 W
    Y: 380 ... 480 V, 60 Hz, 1,5 A, 500 W
    Δ: 270 ... 330 V, 50 Hz, 2,0 A, 400 W
    Y: 465 ... 570 V, 50 Hz, 1,16 A, 400 W
    Δ: 290 ... 360 V, 60 Hz, 2,1 A, 500 W
    Y: 500 ... 600 V, 60 Hz, 1,26 A, 500 W
    Δ: 230 V, 50 Hz, 2,7 A, 370 W
    Δ: 115 V, 60 Hz, 3,0 A, 450 W
    Δ: 220 ... 270 V, 50 Hz, 2,5 A, 400 W
    Y: 380 ... 465 V, 50 Hz, 1,45 A, 400 W
    Δ: 240 ... 290 V, 60 Hz, 2,6 A, 500 W
    Y: 415 ... 500 V, 60 Hz, 1,55 A, 500 W
    Auxiliary gas connections
    Purge airHose nozzle 40 mm
    Test functionsPressure switch (switching point –35 hPa)
    Integrated components2-step air filter, type Europiclon, dust capacity 200 g
All technical data can be found accompanying the individual product

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