 |
White paper on folded-path TDLs |
Tunable diode laser (TDL) spectrometers are gaining widespread use in the chemical and pharmaceutical industries due to their dependable performance and minimal maintenance requirements.
These qualities have established them as the favored choice for gas analysis in safety-critical settings. Despite this, their deployment is sometimes limited by the specific installation environments and challenging process conditions.
This white paper looks at oxygen sensor technology for safety applications using folded-path TDLs. A range of adaptions makes measurement opportunities previously considered impossible, possible.
Folded-path TDLs offer compact size, lightweight design, and single-flange installation, simplifying their use in small pipes and tight spaces such as reactor vents or flares. They provide high measurement accuracy by doubling the optical path length through multi-reflection cells and passing the laser beam twice or more through the sample.
Other key benefits include reduced maintenance and operating costs due to minimal purge gas requirements and features like robust PTFE or metal filters with blow-back functionality to prevent clogging from condensables or dust. This ensures reliable, continuous, real-time monitoring, which is crucial for safety applications, such as inertization in pharma or controlling side reactions in polymerization.
Compared to traditional cross-stack TDL analyzers, folded-path designs avoid the need for complex sample extraction systems and structural modifications, lowering installation complexity and expenses. Their adaptability provides effective oxygen sensor technology for safety monitoring even under conditions of moisture, dust, and high gas flow rates.
