Siemens

SITRANS TDL / SITRANS SL – In-Situ Laser Gas Analysis for Fast and Reliable Process Control

Direct gas measurement where speed, reliability, and low maintenance matter

When your process requires immediate and reliable gas concentration data without sample handling, SITRANS TDL and SITRANS SL provide in-situ laser-based gas analysis designed for continuous operation in demanding industrial environments.

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Tor Erik Sannum

+47 4153 7001

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In-situ laser gas analysis based on TDL spectroscopy

SITRANS TDL and SITRANS SL are in-situ gas analysers using Tunable Diode Laser (TDL) spectroscopy to measure gas concentrations directly in the process gas stream.

By eliminating sample extraction and conditioning, these analysers deliver fast response times, high measurement reliability, and minimal maintenance requirements.

The technology is well suited for harsh process conditions with high temperatures, dust loads, and aggressive gases, where traditional extractive systems can be challenging.

Key features and capabilities for demanding industrial processes

SITRANS TDL and SITRANS SL are engineered for stable, long-term performance in real-world process conditions.

In-situ measurement principle with no sample extraction
Laser-based TDL spectroscopy for selective and interference-free measurement
Very fast response time for real-time process control
Minimal maintenance, with no sample lines or conditioning systems
Suitable for high temperatures and dusty process gases
Robust industrial design for continuous 24/7 operation
Easy integration into automation and control systems

Typical applications where in-situ measurement adds value

SITRANS TDL and SITRANS SL are used in applications where direct measurement improves reliability and control performance.

Combustion control in boilers, furnaces, and kilns
Oxygen and carbon monoxide measurement for combustion optimization
Process control in cement, steel, and chemical industries
Emissions-related monitoring where fast response is critical
Energy, power generation, and waste-to-energy plants

Benefits for you – from reduced maintenance to better control

By choosing SITRANS TDL or SITRANS SL, you gain a gas analysis solution that simplifies installation and operation while improving process insight.

Immediate measurement results for faster control actions
Lower operating costs due to minimal maintenance
Higher availability compared to extractive analyser systems
Reliable performance in harsh environments
Improved process efficiency through accurate real-time data

Part of Siemens’ in-situ process analytics portfolio

SITRANS TDL and SITRANS SL are key components of Siemens’ in-situ gas analysis portfolio and are often combined with other process analytics solutions to create complete, application-optimised systems. Norsk Analyse supports you with application expertise, project execution, and service throughout the solution lifecycle.