High Accuracy Oxygen Analyser – Overview

This analyser is ideal for challenging applications such as measuring ppm levels of oxygen in hydrogen, helium and flammable gases, as well as high levels of oxygen in concentrators, incubators and glove boxes. The high and low-range oxygen sensors switch over automatically using a hysteresis function to optimise readings, with an adjustable switching point. The optical oxygen sensors are virtually drift-free and are factory-calibrated for life, making their lifetime cost of ownership more economical. These sensors are suitable for demanding high-oxygen applications where VOCs, flammable gases, CO, H₂ or He are present in the gas sample.

The optical oxygen sensor technology is based on luminescence quenching of a sensor dye. The dye is excited with red light, and the properties of the resulting luminescence are measured in the near infrared. The presence of molecular oxygen in the gas quenches the luminescence, changing its intensity and producing a calibrated oxygen measurement. This principle is very robust, shows virtually no interference from other gases and has a very low drift. It does not deplete over time, unlike galvanic oxygen sensors with their limited shelf life, as the optics and electronics are hermetically sealed from the measured gas. For typical indoor conditions, a 5–10 year operating life is expected.

High Accuracy Oxygen Analyser  – Features

• Long life
• Fast response
• High-accuracy measurement from 0.1 ppm to 100% oxygen
• Low drift
• Factory calibrated
• Digital output of oxygen partial pressure
• Temperature compensation
• Low power consumption
• Lead-free, ROHS-compliant