CNBTROxygen Flow Meter 0-5 LPM Acylic Flowmeter Gas Acrylic Metal Fitting for Oxygen Air Gas Conectrator

Product worked great for my use, the fittings were a little large for standard Q2 connections but with a force, they fit ok.

This is the second flow meter I've purchased. The nylon connectors on the original one broke after nearly two years of use, storage in a garage, and exposure to hot/cold temps. I also purchased a similar model with the metal connectors vice the nylon ones.No idea whether this flow meter is accurate or not. I've used it to measure pure oxygen flow into beer just before I pitch the yeast. An oxygen rich environment is better for yeast at the beginning of fermentation, but afterwards it will skunk the beer quickly. As I said, I have no clue whether it's accurate but it gave me a great sense of control over the flow rate. Previously I would be absolutely blasting my unfermented wort with quite a bit of oxygen. Now I notice that the red cannisters from HD are lasting many more brews than they did before. Am I under-oxygenating? No clue!! I have no way of checking how accurate this thing is.Assuming for a moment it's accurate, the beer has been tasting wonderful, the yeast has been doing its job, and I've been able to save money on oxygen.Minus one star for the limited longevity of the nylon connector. Not that I didn't expect it to break, just that the overall value is lower if I have to replace every few years. I would recommend it to anyone who doesn't have the inline flow meter and wants to more accurately deliver pure oxygen to unfermented wort.

This product is so convenient and inexpensive it is worth putting up with the flaws. I own two of these! Among the flaws are:1.The nozzles are slightly large for standard US oxygen equipment. I found that if I heated the ends of my cannula and O2 hose with a hair dryer they slid on easily and fit snugly2 Accuracy can be a little off. It varies unit by unit. I have owned two of these. One consistently matched the flow meter of the attached concentrator and one was a half liter low at every flow.3. It needs a lanyard to wear it around your neck (it's too heavy to just dangle from the cannula) and there is no convenient way to attach one (I tied my around the outflow nozzle)4. The adjustment dial is slightly wider than the body so if it is lying on something and gets pushed or pulled it can change the flow (I hang it from the lanyard to avoid this)That said, having the ability to change the flow from my concentrator with this remote float valve makes it worth it's weight in gold! For the price it is a great product.

CNBTR LZQ-3 Acylic Flowmeter Gas Acrylic Metal Fitting Oxygen Rotameter 0-5 LPM-----I wear 02 24/7. when sitting I only need 2-LPM, but when I get up & walk even short distance I need 5LPM. I constantly forget to turn up my flow at the concentrator when i get up.(it is also hard to see).I purchased this so I could wear it & adjust my flow when i get up (even if i forget,); I can adjust from another room when reminded by SOB without going back to concentrator. Also, my concentrator is in my living room so when I get up in the night, this flow meter enables me to adjust my air flow before i get out of the bed & re-adjust it when i'm settled back in to bed.I LOVE IT!EXCEPT;the tips to hook my 02 lines to are located in the back of the flow meter. Which causes it to lie across my body, instead of straight down.in line with my oxygen tubing.this causes my 02 tubing to kink at the connection.(i had to wrap medical tape thickly 4'' or more to stop kink. (a friend recommended "spiral wrap" may prevent the kinking...i haven't tried that yet, but sounds like ggood idea to prevent the kinking)This product would have gotten 5 stars from me if the connection tips would have been located at top and bottom of flow meter so it would lie inline with tubing and prevent kinking.ps. for those having hard time that the tips are a bit large for the tubing; i found that if tubing tip is dipped in hot water it softens it & will slide on to tip easily & then tightens for a good grip as it cools. (learned this putting on bicycle hand grips)----be careful with hot water,due to fact that long line blows into meter. I didn't want meter to get water in it. So, I had my long line on & blowing air when i dipped it.Take Caution; it bubbles up which could cause burns!I didn't have to worry about water inside top line as it is blowing out so would not blow water into meter & possibly cause condensation problem.long review, but wish i had known these things when I purchased mine.even with problems, it is a good product for those that need to adjust 02 flow. It would be great product if tips were re-located!

Good deal and is accurate.

As soon as I got it I hooked it up to a hho cell ran the cell for an 1/2 hour then the scum on top of the cell got into the flow guage [ hurt my feeling, to trash it right away ] flushed it out , seems no harm came to it, as far as accurate , not sure , but it does show flow and at this point, I'm ok with the the measurements it gives until I need something more precise

The product seems to work fine. The only issue encountered was that the connections are listed as 8 mm, but are actually too small for 5/16" I.D. (7.9 mm) flexible tubing. 1/4" I.D. tubing works better but is a tight fit. A suggestion on the tubing size in the product information would be helpful.

Very pleased with the Guage, professional durable quality.. I got it to compare my airflow I set at the concentrator to what's coming out on a 50 foot airhose.....Spot that cracked hose in seconds....