three things that wreck trace oxygen accuracy

Buyers often blame the analyzer when the real problem is the installation. First, sample flow rate: too low and the reading lags and drifts; too high and you can damage the sensor — the analyzer must be matched to a controlled flow. Second, calibration gas: trace analyzers need a zero gas to set the baseline (even trace oxygen in your "zero" gas corrupts it) and a span gas near your target range; daily zero and periodic span checks are standard discipline. Third, sensor choice for the matrix: an electrochemical sensor that works perfectly in nitrogen can be poisoned or skewed by CO2, H2S, or solvent vapors.

1368's diagnostic approach catches all three before you buy, so the analyzer performs in your plant — not just in the brochure. 

App note: สามสิ่งที่ทำลายความแม่นยำของ trace oxygen