Paramagnetic Oxygen Analyzer (General Purpose Type) MG8G

The MG8G paramagnetic oxygen analyzer measures the concentration of oxygen based on the fact that a magnet attracts gaseous oxygen. Whereas zirconia oxygen analyzers cannot measure oxygen in flammable gas mixtures, the MG8G can measure oxygen concentration in flammable gas mixtures.

With an appropriate sampling system it can also measure oxygen in high temperature, high pressure, high dusty, or high-humidity process gas mixtures.

The sensor has a totally new architecture for its magnetic proportional flow rate system that has been developed based on our long and field-proven experience. The converter provides ease of use and high reliability.


The converter provides improved system reliability, enhanced / useful functionality, and ease of use.

  • Easy Operation with Large Display: Analog bar graph, large digital LED display, status indication
  • One-touch calibration, Autmatic Calibration for Labor-saving
  • Multiple Self-diagnosis Functions

The detector uses a magnetic proportional flow rate system, a world's first. This unique technology is based on our more than 30 years experience with paramagnetic oxygen analyzers

  • Reliable sensor: Long life, stable thermistor, 90% response within 3 seconds, minimum drift
  • Structure with No Movable Parts
  • Interference-gas Compensation Function: Excellent linearity and repeatability of ± 1% F.S.
Measurement object Oxygen concentration in gaseous mixture
Measurement system Paramagnetic system
Measurement range 0-5 to 0-25 vol%O2, 3 range can be programmed
Analog output signal 4 to 20 mA DC (load resistance; Max. 550Ω)
Contact output Fail; 1 point, open or closed when error occures, user configurable
Maintenance status; 1 point, closed during maintenance
Range answerback or Hi/Lo alarm; 2 points, normally de-energized
Contact input Remote range switching, calibration start
Calibration method Automatic calibration, semiautomatic calibration, manual calibration
Calibration gas Zero gas; N2 gas
Span gas; Dry air
Auxiliary gas pressure N2 gas, 180 kPa(Approx. 35 ml/min)
Sample gas condition Gas flow; 200 ml/min ±10%
Gas temperature; 0 to 50℃
Humidity; No moisture condensation in the flow path or the sensor
Ambient temperature -5 to 55℃
Installation Indoor, panel or wall mounting
Power supply 100-115 V AC, 50/60 Hz or 200-240 V AC, 50/60 Hz
Repeatability ±1% or less of F.S.
Linearity ±1% or less of F.S.
Response time 90% response within 3 sec
(measured gas flow rate: 200 ml/min.)
Zero drift ±1.5% or less of F.S./Week
Span drift ±2% or less of F.S./Week


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