Mettler Toledo GPro 500 laser gas analyser/oxygen sensor

Tunable diode laser (TDL) gas analysers are a significant improvement over extractive analysis systems. Firstly, no sample extraction or conditioning is necessary. Secondly, they are immune to interference from moisture, dust or background gases. And thirdly, they exhibit very low drift.

The GPro 500 oxygen sensor has combined TDL technology with expertise in industrial application analytical instrument design to create a probe that delivers the convenience of an inline sensor and the level of measurement confidence of a top-line analyser.

Many TDL gas solutions are of a cross-stack design, meaning that the receiver must be positioned directly opposite the laser source. This causes installation difficulties and requires regular, troublesome realignment. The oxygen sensor incorporates a probe that reflects the laser beam back to the receiver in the sensor head so that alignment is never required. And because the laser beam travels twice through the gas stream, the optical path length is doubled, resulting in more accurate O₂ measurements.

Mettler Toledo’s Intelligent Sensor Management (ISM) technology adds to the features of the sensor by incorporating predictive diagnostics that continually assess the optical path quality and indicate when cleaning is required, before measurements are affected. Other than yearly verification and occasional cleaning of the optics, no other maintenance is required.