Principle of Operation：

The TDLAS Tunable Diode Laser Spectroscopy is primarily used in high-end gas analyzers and is characterized by its highly selective measurement capability. The H2O properties are used for H2O measurement: That means H2O atoms in the near infrared range are stimulated at specific wavelengths. A laser diode modulates the radiation precisely over an absorption peak. The high-energy radiation transfers energy to the H2O atoms and the signals becomes weaker. In the measuring probe, the laser beam hits the H2O atoms and is weakened according to the concentrations of oxygen present there. A receiver measures the intensity of the arriving radiation and accurately determines the absorption. One distinct advantage of laser spectroscopy is it´s insensitivity to possible interference. For H2O in particular, there is no absorption of other gases in the range of sampled absorption peaks.

Special features:

• Simple, cost-efficient operation and low maintenance
• Retrofit functionality, easy to integrate into existing
• sampling or distribution systems
• High integrity moisture in liquid measurement from
• 0.01 ppmW to saturation point
• Robust design for undisturbed operation in many
• non-polar liquids over a long time
• Three 4...20 mA configurable outputs and digital
• Modbus RTU-based communication
• Replaceable sensor element with Innokie Calibration
• Exchange Service for reliable cost-efficient calibration
• NIST and NPL traceable calibration