Laser Moisture analysis delivers a simple, sensitive measurement

This moisture analysis technology uses TDL spectroscopy to measure trace moisture in pure gases. It has a simple, robust design, using a single laser source and single detector to measure the sample and reference gases.

TDL has advantages over other measurement techniques, as the moisture sample comes into contact with only a few optical components made from very robust materials. It works according to the fundamental principle of Beer’s law; therefore the reading is stable over time and never requires calibration.

To provide a more sensitive measurement, our sensors use a Herriott cell to reflect the laser back and forth numerous times, using mirrors inside the measuring cell. This increases the laser path length, achieving extremely high sensitivity.

TDL moisture sensing delivers exceptional performance capable of measuring down to industry-leading sub-ppb levels, drift-free operation, high accuracy and low maintenance. This is achieved through self-correcting optics and laser line locking onto the water peak, removing all possibility of significant drift.