ULTRAMAT 23 Continuous Gas Analyzer

Continous Gas Analyzer

Due to its multi-component design with UV and NDIR technology for measuring up to three IR-active components and optionally available electrochemical sensors (O2 and H2S measurement), the ULTRAMAT 23 offers high cost efficiency and space savings. 

Continuous and economical gas measurement

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Multi-component gas analyzer

ULTRAMAT 23 – a true all-rounder

The ULTRAMAT 23 is an innovative multi-component gas analyzer which can be equipped with the following sensors: IR detector for IR-active gases, UV photometer for UV-active gases, H2S sensor (electrochemical), O2 sensor (electrochemical or paramagnetic), and used accordingly in numerous applications and industries. The integrated automatic calibration function using ambient air provides the unique advantage of requiring a test with calibration gases only once a year. Menu-guided operation in plain text allows users and service personnel to operate the device immediately. Preventive maintenance is made possible by the information in the logbook.

High selectivity due to multi-layer detectors

The multi-layer detectors used guarantee high selectivity and reduced water vapor interference. The measuring cuvettes used are robust and resistant and can be cleaned easily in case of disturbances induced by faults in the sample preparation and subsequent contamination.  The electrochemical oxygen sensor is used to determine the O2 reference variable, and the hydrogen sulphide sensor extends the application range of the ULTRAMAT 23 to applications in biogas plants. The additional use of electrochemical sensors together with NDIR technology in a single basic device saves costs in sample preparation and spare parts inventory.


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How long will it take for your couch to burn if it catches on fire?

ULTRAMAT 23 gas analyzers capture precise continuous gas measurements for UL Fire Safety Research.

Technical specifications

Max. number of components 
E.g., CO, CO2, NO, SO2, CH4, O2, H2S
Smallest measuring range 
Component specific: 0–50 / 0–500 vpm 
19" withdrawable unit 

Benefits at a glance

  • Highly cost-effective because calibration gases are not required (AUTOCAL with ambient air, depending on the measuring component) 
  • High selectivity due to multilayer detectors e.g. low cross-sensitivity to water vapor 
  • Cleanable cuvettes: Cost savings through further use in case of contamination 
  • Menu-guided operation in plain text 
  • Open interface architecture (RS 485, RS 232; PROFIBUS, SIPROM GA): Simplified process integration; remote operation and control
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Information at a glance

Whether you have technical questions or need spare parts – we have summarized essential additional information for you below.
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Process Analytics Services

To remain competitive, companies in industry must ensure – and ideally increase – the availability and productivity of machines and plants. As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise.

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Siemens Industry Online Support (SIOS)

As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise. With our offerings, you can expect a high degree of reliability and a successful digital future for your company.


Process Analytics Training

Siemens experts are available with a variety of training courses and to help you understand gas chromatography and continuous gas analysis and how to operate and maintain your Siemens analytical products. Siemens offers both introductory and advanced courses several times a year.


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We are represented worldwide with production facilities and system integration centers. Each center, whether in Houston, Singapore, or Karlsruhe, has its own sales, engineering and assembly teams, service and logistics hotlines and well-equipped training centers. In addition, our employees have a global presence and are familiar with all relevant local requirements, guidelines, and standards.

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