Features
- Fast, easy one-point calibration
- Low maintenance
- Measures oxygen from 0.1 ppm to 100 percent; Can measure oxygen in reducing gases
- Fast response (90 percent of step change in less than 1 second)
- Extremely stable sensor operation
- Months of trouble-free service; calibration checks or adjustments seldom required; one-point calibration is sufficient for entire range from ppm to percent oxygen
- Accuracy increases at low oxygen concentrations
The Panametrics CGA 351 oxygen analyzer utilizes an advanced zirconia sensor to accurately determine
oxygen content in process gases. Microprocessor-based electronics allow the Panametrics CGA 351
oxygen analyzer to take measurements from ppm levels to 100 percent oxygen.
Applications for the Panametrics CGA 351 Oxygen Analyzer
The Panametrics CGA 351 oxygen analyzer is suitable for monitoring and/or controlling gas streams or
atmospheres such as in air separation, heat treating, ceramic manufacturing, and other processes. For
dirty or wet gas applications, a suitable sampling system may be required.
How the Panametrics CGA 351 Oxygen Analyzer Works
Sample gas enters the Panametrics CGA 351 oxygen analyzer's inlet port through a needle valve and flows
into a ceramic inlet tube. It then flows through the annular space between the inlet tube and the inside
of the zirconium oxide oxygen sensor, then out through the outlet port and a flowmeter. When there are no
combustibles present in the sample gas, the analyzer measures total oxygen. Then combustibles are present,
a platinum based catalyst, at the end of the ceramic tube, ensures that the sample reaches equilibrium
before contacting the inner electrode. It is therefore possible to measure either oxygen excess or
deficiency in air/fuel mixtures.
The Panametrics CGA 351 oxygen analyzer's zirconium oxide sensor is heated and closely controlled at
700°C (1292°F). As the sample contracts the inner electrode of the heated sensor, an electrical signal is
generated, proportional to the logarithm of the ratio of the oxygen concentration in the sample gas to the
oxygen concentration in a reference gas contacting the outer electrode. The Panametrics CGA 315 oxygen
analyzer's electronics displays O2 in ppm or percent. It also displays other parameters including O2 sensor
millivolts and sensor temperature in °C or °F. Ambient air is used as the reference gas on the outside of
the electrochemical cell.
Trace O2 Applications
The full-featured Panametrics CGA 351 oxygen analyzer is typically used in applications such as:
Air separation plants
Glove boxes
Semiconductor manufacturing processes
Heat treat and metallurgical processes
Glass and ceramic research
Inert gas purity
Blanket gas monitoring
Medical research
Gas blending
Special Applications for the Panametrics CGA 351 Oxygen Analyzer
Welding atmospheres
Gas generators
Air/fuel mixtures
