ResOne Standard Liter Meter Pen: Measure Oxygen Flow Rates Up to 8 LPM - Compact Oxygen Flow Meter for Quick, Precise Flow Checks

If you are curious or feel you just want to be sure you getting the right O2 flow to your cannula this pen does the trick. I put in a pseudo-valve wye at my concentrator to aid with my hose management. I setup one to the bedside and one to the living room. I wasn't sure I was getting the correct flow to the living room due to having more hose to that area. This pen allowed me to confirm my flow to both locations. It's just an engineering thing.

Same as that used by technicians for oxygen concentrator measurement. Works great for assurance that oxygen flow is sufficient at cannula.

works It

I'm on Oxygen 24/7 and need to have a steady flow. This item gave me the Oxygen flow within seconds!!

I was skeptical at first but it is VERY accurate and easy to use.

Handy little tool that gives you comfort and precise measurement when you believe your air compressor needs adjusting.

Used tis to test my oxygen concentrator. Reads the same as the ball on the machine.

I have two of these gauges. They do agree with each other. They also show the same reading that’s shown by the flow meter on the oxygen concentrator. I use the gauge to make sure that the oxygen is flow rate as delivered at the CPAP intake is what the doctor ordered.