Different Uses of an O2 Analyzer

Comparing the Different Measurement Systems of O2 Analyzer

Oxygen is used in the emergency treatment of patients both in the hospital setting and in situations that require administration of first aid. This gas is very crucial for the resuscitation of patients whose injuries cause them major shock and trauma including hypothermia. Another common use of oxygen is for patients suffering emphysema, the long term effect of smoking and chronic obstructive pulmonary disease to allow the patient to breathe easily and improve the worsening condition. O2 analyzers are essential for accurately measuring oxygen flow and pressure including checking for oxygen percent accuracy in concentrators in hospitals and homecare environments.

O2 analyzers in diving applications

An O2 analyzer is an essential device in scuba diving centers where multiple in-line tanks need nitrox and compressed air analysis. The scuba tank or diving cylinder is used to transport high pressure breathing gas to the scuba diver and it should be ensured that it is free from any contaminants. Special precautions always need to be undertaken when gases other air are used because contaminated air at a depth can be fatal. The most common contaminant is carbon monoxide which is a by-product of combustion. Other contaminants include carbon dioxide, oil and lubricants from the compressor. In most countries, diving cylinders need to be checked on a regular basis with a visual inspection certificate and hydro-test date available for the users.



Measurement systems of O2 analyzers

Oxygen concentrations are measured for a variety of purposes that includes energy conservation, prevention of air pollution, safety management and quality control. The measurement methods of O2 analyzers are as follows:

  • Zirconia type measurement system – where a solid electrolyte like zirconia exhibits conductivity of oxygen ions at high temperature. The advantage of this type of measurement is it can be directly installed into the combustion process such as the boiler’s flue without need for a sampling system.
  • Zirconia type measurement system: Limiting current type – where the flow of oxygen into the cathode of the zirconia element heated to high temperature is limited. The advantages are the capability of measuring trace oxygen concentrations and the necessity for calibration only on the span side.
  • Magnetic type measurement system: paramagnetic system – this is one method where the paramagnetic property of oxygen is utilized. This measurement system is capable of measuring flammable gas mixtures that cannot be measured by the zirconia O2 analyzer. It can also measure corrosive gases and offers a faster response rate than other systems.
  • Optical type: Tunable diode laser measurement system – based on the absorption spectroscopy. It is capable of measuring a number of near infrared absorbing gases in difficult process applications with the capability of measuring at very high temperatures, high pressures and under very difficult conditions.
  • Electro chemical type: Galvanic cell type – where the detecting system can be made compact. One advantage of this system is its portability which makes transport easier. If compared to other O2 analyzers in other measurement systems, this system is relatively inexpensive. However, the cell life is limited and should be replaced yearly.

I prefer the Zirconia measurement system for o2 analyzers.
Posted by: Jacques | November 7, 2013, 10:01 am
A good o2 analyzer will detect oxygen in even the smallest concentrations.
Posted by: Greg Wright | October 25, 2013, 1:09 pm
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