With the Oxygen Analyser M1-K it is possible to measure oxygen in the concentration range from 10 ppmv up to 96 Vol.-% in a gaseous atmosphere. According to the used sensor type the digital display shows the the actual concentration in the ppmv or Vol.-% level. The analyser is equiped with an acoustic and a visual alarm and warns the user if a fixed value is exceeded or falled.
Features
- on board microprozessor
- compact and robust design
- high accuracy
- high selectivity
- fast response
- integrated pump (optional)
- RS485 interface
- very high measuring range (10 ppmv up to 96 Vol.-%)
Application fields
- Measuring equipment
- Medical treatment
- Food packaging
- Climate control, air quality monitoring
- Control the ambient air during welding under protective gas
- Exhaust gas measuring
- Combustion control
- Safety controls
Principle of operation
The amperometric oxygen-sensor mainly consists of a electrochemical oxygen "pump cell" based on zirconia material.
Due to an applied voltage to the zirconia electroyte cell the resulting oxygene ions are pumped through the zirconia disc from the cathode side to the anode side. By attaching a cap with a pinhole on the cathode side and by increasing the voltage over the cell the current shows saturation due to the rate limiting step in the transfer of oxygen to the cathode.
The resulting limiting current (saturation current) is nearly proportional to the ambient oxygen concentration.
Therefore these sensors have many advantages compared to other elctrochemical sensors:
- Long service life
- Low or no interferences with other gases
- Single point calibration is only necessary once
- High measuring range
