The instrument calculates the concentration of nitrogen by measuring the oxygen concentration. The method is that the oxygen electrode converts the oxygen concentration in the gas into an electrical signal, and the concentration of nitrogen in the gas to be measured is directly displayed by the subtractor. The instrument adopts the controller calibration method 79.0, which is convenient to operate and has a range automatic conversion circuit. When the nitrogen concentration is high and 95.0, the instrument range is automatically converted, the reading is 95.00, and the instrument measurement range is 99.99. The instrument also has a lower limit. Adjust the setting circuit, the setting range is 91.0～99.9. When the nitrogen concentration is lower than the lower limit set value, the alarm indicator lights up, the machine outputs 220V5A contact signal, and has 4~20mA signal output (oxygen content is 0) ~1%) can be connected to the recorder.
The instrument is suitable for pressure swing adsorption nitrogen generator, air separation equipment, and nitrogen concentration analysis in nitrogen-oxygen mixture.
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