When measuring trace oxygen, can I use plastic tubing to deliver the sample to the analyzer?
Recognizing that ambient air contains 209,000 ppm (20.9%) of oxygen, use of plastic sample tubing exacerbates the chance that an oxygen leak from outside air will taint the readings. A minute air leak can render a measurement useless. Usually, copper or stainless steel tubing is always the materials of choice.
- I found that after calibrating the company’s trace oxygen analyzer on air (209,000 ppm O2), the accuracy of the readings at 75 ppm were way off. Why is this?
- My sample gas contains hydrocarbons and/or hydrogen along with trace levels of oxygen. Can I use an oxygen analyzer with a zirconium oxide sensor?
- When measuring trace oxygen, can I use plastic tubing to deliver the sample to the analyzer?