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

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.
Description | Cross-duct version | ||||||
Measured values | CO | ||||||
Measurement principles | Gas filter correlation | ||||||
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Conformities | TUEV type-examination | ||||||
Electrical safety | CE | ||||||
Mounting | Mounting flange, DN125, PN6 Mounting flange, ANSI, 5″ | ||||||
Test functions | Manual span check with gas-filled cell |
Description | Measuring probe version | ||||||
Measured values | CO | ||||||
Measurement principles | Gas filter correlation | ||||||
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Conformities | U.S. EPA conform Only gas-testable measuring probe (GPP) | ||||||
Electrical safety | CE | ||||||
Mounting | Single mounting point on the duct Mounting flange, DN125, PN6 Mounting flange, ANSI, 5″ | ||||||
Test functions | Manual span check with gas-filled cell |
Description | Analyzer unit in measuring probe version | ||||||
Electrical safety | CE | ||||||
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Description | Sender unit of the cross-duct measuring system | ||||||
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Electrical safety | CE | ||||||
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Description | Receiver unit of the cross-duct measuring system | ||||||
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Electrical safety | CE | ||||||
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Description | Measuring probe in open design with integrated purge air control system | ||||||
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Electrical safety | CE | ||||||
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Material in contact with media | Stainless steel 1.4571, stainless steel 1.4539 | ||||||
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Integrated components | Flow monitor for purge air monitoring PT1000 temperature sensor Pressure sensor |
Description | Measuring probe with gas permeable filter element for adjustment with test gas | ||||||||||
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Electrical safety | CE | ||||||||||
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Material in contact with media | Stainless steel 1.4571, stainless steel 1.4539, ceramics, PTFE | ||||||||||
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Integrated components | PT1000 temperature sensor Pressure sensor Heating of optical surfaces |
Description | The control unit serves as the human machine interface and is responsible for data processing and output as well as control and monitoring functions. | ||||||||||
Electrical safety | CE | ||||||||||
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Analog outputs | 1 output: 0/4 ... 20 mA, 500 Ω | ||||||||||
Analog inputs | 1 input: 0 ... 20 mA, 100 Ω For gas temperature | ||||||||||
Digital outputs | 2 relay contacts: 48 V AC, 1 A, 60 VA / 48 V DC, 1 A, 30 W | ||||||||||
Digital inputs | 1 input: 24 V | ||||||||||
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Input | Arrow keys Functional keys | ||||||||||
Operation | Menu-driven operation via LC-display and membrane keyboard | ||||||||||
Model | Steel sheet enclosure | ||||||||||
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Description | The control unit serves as the human machine interface and is responsible for data processing and output as well as control and monitoring functions. | ||||||||||
Electrical safety | CE | ||||||||||
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Analog outputs | 3 outputs: 0/4 ... 20 mA, 500 Ω Electrically isolated | ||||||||||
Analog inputs | 1 input: 0 ... 20 mA, 100 Ω For gas temperature | ||||||||||
Digital outputs | 3 relay contacts: 48 V AC, 1 A, 60 VA / 48 V DC, 1 A, 30 W | ||||||||||
Digital inputs | 3 inputs: 24 V | ||||||||||
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Input | Arrow keys Functional keys | ||||||||||
Operation | Menu-driven operation via LC-display and membrane keyboard | ||||||||||
Model | Steel sheet enclosure | ||||||||||
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Description | For extending the internal CAN bus connection with a cable provided by the customer | ||||||||||
Electrical safety | CE | ||||||||||
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Integrated components | On-board 24 V power supply for the sender/receiver unit |
Description | Unit to provide dust-free air for flushing of optical surfaces | ||||||||||||||||||||||||||||||
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Electrical safety | CE | ||||||||||||||||||||||||||||||
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Test functions | Pressure switch (switching point –35 hPa) | ||||||||||||||||||||||||||||||
Integrated components | 2-step air filter, type Europiclon, dust capacity 200 g |