In-situ gas analyzers
GM901

Your Benefits

  • Nearly uncompromised measurement results thanks to direct in-situ measurement
  • Quick and easy installation and commissioning
  • Simple, user-friendly operation
  • Economical because it is low maintenance

GM901
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.

Overview

The GM901 gas analyzer is available as a cross-duct or probe type. As a result, it is suited to a broad range of applications – even for difficult measuring tasks such as high dust loads, overpressure, critical flow profiles, or high measuring gas concentrations.

At a glance
  • Representative measurement along the duct diameter
  • Operation via control unit
  • Short response times
  • Verifiable with gas-filled cell; gas-testable probe with test gas

Accessories

Spare parts

Applications

Service & Support

Technical overview

 
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  • GM901 cross-duct system

    GM901 cross-duct system

    DescriptionCross-duct version
    Measured valuesCO
    Measurement principlesGas filter correlation
    Measuring ranges
    CO0 ... 500 ppm / 0 ... 20,000 ppm
    Relative to 1 m measuring path
    Response time (t90)
    5 s ... 360 s
    Accuracy
    ± 5 %
    Of measuring range full scale
    Ambient temperature
    –20 °C ... +55 °C
    ConformitiesTUEV type-examination
    Electrical safetyCE
    Mounting

    Mounting flange, DN125, PN6

    Mounting flange, ANSI, 5″

    Test functionsManual span check with gas-filled cell
  • GM901 Measuring probe system

    GM901 Measuring probe system

    DescriptionMeasuring probe version
    Measured valuesCO
    Measurement principlesGas filter correlation
    Measuring ranges
    CO0 ... 500 ppm / 0 ... 20,000 ppm
    Depending on active measuring distance and gas temperature
    Response time (t90)
    5 s ... 360 s
    Accuracy
    ± 5 %
    Of measuring range full scale
    Ambient temperature
    –20 °C ... +55 °C
    ConformitiesU.S. EPA conform
    Only gas-testable measuring probe (GPP)
    Electrical safetyCE
    Mounting

    Single mounting point on the duct

    Mounting flange, DN125, PN6

    Mounting flange, ANSI, 5″

    Test functionsManual span check with gas-filled cell
  • Sender/receiver unit

    Sender/receiver unit

    DescriptionAnalyzer unit in measuring probe version
    Electrical safetyCE
    Enclosure rating
    IP65 / NEMA 4
    Dimensions (W x H x D)
    254 mm x 338 mm x 304 mm (for details see dimensional drawings)
    Weight
    6 kg
    Power supply
    Voltage24 V DC
    VoltageSupply via control unit
  • Sender unit

    Sender unit

    DescriptionSender unit of the cross-duct measuring system
    Measuring distance
    Cross-duct version0.5 m ... 8 m
    Process temperature
    ≤ +250 °C
    With extended calibration≤ +430 °C
    Process pressure
    ≤ 30 hPa
    Depending on purge air supply
    Process gas humidity
    Non-condensing
    Electrical safetyCE
    Enclosure rating
    IP65 / NEMA 4
    Dimensions (W x H x D)
    150 mm x 169 mm x 241 mm (for details see dimensional drawings)
    Weight
    3 kg
    Including purge air fixture
    Power supply
    Voltage24 V DC
    VoltageSupply via control unit
  • Receiver unit

    Receiver unit

    DescriptionReceiver unit of the cross-duct measuring system
    Measuring distance
    Cross-duct version0.5 m ... 8 m
    Process temperature
    ≤ +250 °C
    With extended calibration≤ +430 °C
    Process pressure
    ≤ 30 hPa
    Depending on purge air supply
    Process gas humidity
    Non-condensing
    Electrical safetyCE
    Enclosure rating
    IP65 / NEMA 4
    Dimensions (W x H x D)
    150 mm x 169 mm x 405 mm (for details see dimensional drawings)
    Weight
    3 kg
    Including purge air fixture
    Power supply
    Voltage24 V DC
    VoltageSupply via control unit
  • Open measuring probe (GMP)

    Open measuring probe (GMP)

    DescriptionMeasuring probe in open design with integrated purge air control system
    Measuring distance
    See dimensional drawings
    Accuracy
    Pressure sensor1 %
    Temperature sensor1 %
    Process temperature
    ≤ +250 °C
    With extended calibration≤ +430 °C
    Process pressure
    –60 hPa ... 30 hPa
    Depending on purge air supply
    Process gas humidity
    Non-condensing
    Dust load
    ≤ 3 g/m³
    Based on a 1 m measuring distance, depending on application
    Electrical safetyCE
    Enclosure rating
    IP66
    Dimensions (W x H x D)
    See dimensional drawings
    Material in contact with mediaStainless steel 1.4571, stainless steel 1.4539
    Power supply
    Voltage24 V DC
    VoltageSupply via control unit
    Auxiliary gas connections
    Purge airHose nozzle 40 mm
    Integrated components

    Flow monitor for purge air monitoring

    PT1000 temperature sensor

    Pressure sensor

  • Gas-testable measuring probe (GPP)

    Gas-testable measuring probe (GPP)

    DescriptionMeasuring probe with gas permeable filter element for adjustment with test gas
    Measuring distance
    See dimensional drawings
    Accuracy
    Pressure sensor1 %
    Temperature sensor1 %
    Process temperature
    ≤ +220 °C
    Process pressure
    –120 hPa ... 200 hPa
    Process gas humidity
    Non-condensing
    Dust load
    ≤ 30 g/m³
    Electrical safetyCE
    Enclosure rating
    IP65
    Dimensions (W x H x D)
    See dimensional drawings
    Material in contact with mediaStainless steel 1.4571, stainless steel 1.4539, ceramics, PTFE
    Power supply
    Voltage115 V AC, ± 10 %
    230 V AC, ± 10 %
    Frequency50 Hz / 60 Hz
    Power consumption≤ 150 VA
    Auxiliary gas connections
    Test gasClamp connection 1/4″
    Integrated components

    PT1000 temperature sensor

    Pressure sensor

    Heating of optical surfaces

  • GM901 control unit

    GM901 control unit

    DescriptionThe control unit serves as the human machine interface and is responsible for data processing and output as well as control and monitoring functions.
    Electrical safetyCE
    Enclosure rating
    IP65
    Analog outputs1 output:
    0/4 ... 20 mA, 500 Ω
    Analog inputs1 input:
    0 ... 20 mA, 100 Ω
    For gas temperature
    Digital outputs2 relay contacts:
    48 V AC, 1 A, 60 VA / 48 V DC, 1 A, 30 W
    Digital inputs1 input:
    24 V
    Serial✔
    Type of fieldbus integrationRS-232
    FunctionProprietary service interface
    CAN bus✔
    FunctionInternal system bus
    Indication
    LC display
    Status LEDs: "Operation", "Service", "Warning" and "Malfunction"
    Input

    Arrow keys

    Functional keys

    OperationMenu-driven operation via LC-display and membrane keyboard
    ModelSteel sheet enclosure
    Dimensions (W x H x D)
    210 mm x 381.4 mm x 108 mm (for details see dimensional drawings)
    Weight
    4.3 kg
    Power supply
    Voltage115 V AC, ± 10 %
    230 V AC, ± 10 %
    Frequency50 Hz / 60 Hz
    Power consumption≤ 50 VA
  • GM901 control unit, with extended connectivity

    GM901 control unit, with extended connectivity

    DescriptionThe control unit serves as the human machine interface and is responsible for data processing and output as well as control and monitoring functions.
    Electrical safetyCE
    Enclosure rating
    IP65
    Analog outputs3 outputs:
    0/4 ... 20 mA, 500 Ω
    Electrically isolated
    Analog inputs1 input:
    0 ... 20 mA, 100 Ω
    For gas temperature
    Digital outputs3 relay contacts:
    48 V AC, 1 A, 60 VA / 48 V DC, 1 A, 30 W
    Digital inputs3 inputs:
    24 V
    Serial✔
    Type of fieldbus integrationRS-232
    FunctionProprietary service interface
    PROFIBUS DP✔
    RemarkOption
    Type of fieldbus integrationRS-485
    CAN bus✔
    FunctionInternal system bus
    Indication
    LC display
    Status LEDs: "Operation", "Service", "Warning" and "Malfunction"
    Input

    Arrow keys

    Functional keys

    OperationMenu-driven operation via LC-display and membrane keyboard
    ModelSteel sheet enclosure
    Dimensions (W x H x D)
    210 mm x 381.4 mm x 108 mm (for details see dimensional drawings)
    Weight
    4.3 kg
    Power supply
    Voltage115 V AC, ± 10 %
    230 V AC, ± 10 %
    Frequency50 Hz / 60 Hz
    Power consumption≤ 50 VA
  • Connection unit

    Connection unit

    DescriptionFor extending the internal CAN bus connection with a cable provided by the customer
    Electrical safetyCE
    Enclosure rating
    IP65 / NEMA 4
    Dimensions (W x H x D)
    175 mm x 110.5 mm x 57 mm (for details see dimensional drawings)
    Weight
    3 kg
    Power supply
    Voltage115 V AC, ± 10 %
    230 V AC, ± 10 %
    Frequency50 Hz / 60 Hz
    Power consumption60 VA
    Integrated componentsOn-board 24 V power supply for the sender/receiver unit
  • 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
    Electrical safetyCE
    Enclosure rating
    IP54
    Dimensions (W x H x D)
    550 mm x 550 mm x 258 mm (for details see dimensional drawings)
    Weight
    18 kg
    Power supply
    Three-phase currentΔ: 200 ... 240 V AC, 50 Hz, 2,6 A, 400 VA
    Y: 345 ... 415 V AC, 50 Hz, 1,5 A, 400 VA
    Δ: 200 ... 275 V AC, 60 Hz, 2,6 A, 500 VA
    Y: 380 ... 480 V AC, 60 Hz, 1,5 A, 500 VA
    Δ: 270 ... 330 V AC, 50 Hz, 2,0 A, 400 VA
    Y: 465 ... 570 V AC, 50 Hz, 1,16 A, 400 VA
    Δ: 290 ... 360 V AC, 60 Hz, 2,1 A, 500 VA
    Y: 500 ... 600 V AC, 60 Hz, 1,26 A, 500 VA
    Δ: 230 V AC, 50 Hz, 2,7 A, 370 VA
    Δ: 115 V AC, 60 Hz, 3,0 A, 450 VA
    Δ: 220 ... 270 V AC, 50 Hz, 2,5 A, 400 VA
    Y: 380 ... 465 V AC, 50 Hz, 1,45 A, 400 VA
    Δ: 240 ... 290 V AC, 60 Hz, 2,6 A, 500 VA
    Y: 415 ... 500 V AC, 60 Hz, 1,55 A, 500 VA
    Auxiliary gas connections
    Purge air40 mm
    Test functionsPressure switch (switching point –35 hPa)
    Integrated components2-step air filter, type Europiclon, dust capacity 200 g
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