Infrared absorption spectroscopy is one of the most versatile and widely used techniques for gas analysis. This article covers three major variants:
FTIR (Fourier Transform Infrared)
Broad-spectrum analysis capable of identifying and quantifying multiple gas species simultaneously. Ideal for complex gas mixtures and unknown sample analysis.
NDIR (Non-Dispersive Infrared)
Simple, robust, and cost-effective for single-gas measurement. Widely used for CO₂, CO, and hydrocarbon monitoring.
TDLAS (Tunable Diode Laser Absorption Spectroscopy)
High-resolution, high-selectivity measurement with fast response. Ideal for trace gas detection and process control applications where cross-interference must be minimized.