The advanced paramagnetic GE Panametrics APX oxygen analyzer is the newest addition to the
Panametrics line of thermoparamagnetic oxygen analyzers and transmitters.
The GE Panametrics APX oxygen analyzer is specially designed with advanced background gas
compensation that makes it ideal for applications with defined or undefined hydrocarbon gases,
including vapor recovery, flare gas, and refinery gas.
Advanced Background Compensation
The GE Panametrics APX oxygen analyzer's advanced background gas compensation not only measures
the thermal conductivity of a gas but also measures the hat capacity and viscosity. By measuring
these additional physical properties, the GE Panametrics APX oxygen analyzer is better equipped
to differentiate background gases that have significantly different or varying diamagnetic effects.
This gives the GE Panametrics APX oxygen analyzer an advantage over other traditional dumbbell
paramagnetic oxygen analyzers, which do not automatically compensate for the inherent diamagnetic
effects of changing background gases. The result is that the GE Panametrics APX oxygen analyzer
reliably measures oxygen more accurately in a broader range of applications with either known or
unknown background gases.
Top Performance and Ease of Use
An onboard microprocessor gives the GE Panametrics APX oxygen analyzer the computing power to
provide automatic oxygen signal compensation and integrated signal-processing algorithms. This
enhances linearity and improves accuracy for reliable, long-term measurement.
The GE Panametrics APX oxygen analyzer also has sophisticated error-checking software with
user-programmable defaults and error limits to detect abnormal measurement conditions, including
a loss of flow to the analyzer or a pressure spike. The GE Panametrics APX oxygen analyzer is
easily programmed through the multilevel, menu-driven interface, which provides convenient access
for changing defaults, analog output scaling, and calibration.
Rugged Design and Low Maintenance
The GE Panametrics APX oxygen analyzer's sensor and electronic components are housed in a
weatherproof and explosion-proof package that can be installed right at the measurement point to
simplify wiring and provide trouble-free operation. The GE Panametrics APX oxygen analyzer's unique
dual-chamber, temperature-controlled, oxygen-sensor design provides resistance to contamination,
while minimizing temperature and flow sensitivity.
How it Works
Oxygen's paramagnetic property causes a gas sample containing oxygen to move within a magnetic
field. Thermistor pairs, which are part of a wheatstone bridge circuit, sense the "magnetic wind"
created by the gas movement. The resulting signal, along with heat capacity and viscosity
measurements, are used by the microprocessor to calculate the oxygen percentage accurately.
Choice of Ranges
The GE Panametrics APX oxygen analyzer provides a 4- to 20-mA output signal that is fully programmable
for zero and span. The output is proportional to oxygen concentration and is internally compensated
for background gas and pressure variations. The GE Panametrics APX oxygen analyzer is available in a
wide variety of measurement ranges.
Applications of the GE Panametrics APX Oxygen Analyzer
A complete oxygen analyzer typically used in applications such as:
- Vapor recovery
- Barge loading
- Flare gas
- Refinery gas
- Olefins such as ethylene and propylene
- Pure hydrocarbons