SST Sensing Ltd

A breath of fresh air in the oxygen sensing industry

0

Source: SST Sensing Ltd

The LuminOx Fluorescent Optical Oxygen Sensor is moving the industry forward like never before. Electrochemical sensors are sensitive to temperature and therefore require external compensation, using hardware or software methods. LuminOx contains built-in temperature compensation, so removes this requirement. Not only does LuminOx measure the temperature but also its two-wire communication port allows the gas temperature to be measured along with oxygen by the host – an added bonus!

The graphs below show how LuminOx’s output remains constant while the gas temperature is changing. Electrochemical sensors, tested at the same time, exhibit significant errors as a result of the changing temperature.

The three sensors were supplied with various fixed gas concentrations and the temperature was varied between -20 and +50degC. The graph below show the results for 0% O2 and 20% O2:

A breath of fresh air in the oxygen sensing industry
A breath of fresh air in the oxygen sensing industry

LuminOx clearly has significantly less sensitivity to temperature when compared to electrochemical sensors. Electrochemical sensors are also susceptible to rapid changes in temperature. Again, LuminOx is less sensitive to this effect due to its built-in temperature compensation.

The three sensors were supplied with 21% O2 and the gas temperature was changed as rapidly as possible, using a heat exchanger, between 15 and 40oC.The blue line in the graph below is the gas temperature measured inside the test enclosure. The temperature is read on the axis to the right of the graph.The O2% reported by the three sensors is measured on the left axis.

A breath of fresh air in the oxygen sensing industry

Although all the sensors have some sensitivity to temperature changes, LuminOx is significantly less sensitive to them.

Customer comments

No comments were found for A breath of fresh air in the oxygen sensing industry. Be the first to comment!