--- product_id: 25152907 title: "Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob" price: "230 Lei" currency: RON in_stock: true reviews_count: 8 url: https://www.desertcart.ro/products/25152907-oxygen-rotameter-flow-range-0-5-lpm-with-flow-control store_origin: RO region: Romania --- # Compact 90mm height, 22.2mm diameter Flow-control knob for easy regulation 0-5 LPM precise flow range Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob **Price:** 230 Lei **Availability:** ✅ In Stock ## Summary > 💨 Master your flow, own the air — precision meets portability! ## Quick Answers - **What is this?** Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob - **How much does it cost?** 230 Lei with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/25152907-oxygen-rotameter-flow-range-0-5-lpm-with-flow-control) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Accuracy:** Highly rated by professionals for dependable flow readings, helping you spot issues like cracked hoses instantly. - • **Durable & Portable:** Lightweight 2.5 oz acrylic body built for professional use, perfect for on-the-go monitoring and quick diagnostics. - • **Sleek Vertical Design:** Mount vertically with back fittings for a clean, tangle-free setup that fits seamlessly into your instrument panel. - • **Precision Flow Control:** Easily adjust oxygen flow from 0 to 5 LPM with a smooth, reliable knob for exact calibration. - • **Multi-Gas Compatibility:** Calibrated for oxygen but adaptable to other gases with simple conversion—versatility that keeps you ahead. ## Overview The CNBTR Oxygen Rotameter offers precise oxygen flow measurement from 0 to 5 LPM with an intuitive flow-control knob. Its compact acrylic cylindrical design (90mm height, 22.2mm diameter) mounts vertically with back fittings for a sleek, tangle-free installation. Calibrated primarily for oxygen, it supports other gases via conversion factors, making it versatile for various applications. Lightweight and durable, this flowmeter is favored by professionals for its reliable accuracy and ease of use in both fixed and portable setups. ## Description Buy CNBTR Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob | Acrylic Cylindrical Body | Overall Height: 90mm | Diameter: 22.2mm | Back Fitting Style Variable Area Flow Meter for Gases: Flowmeters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Heat hose ends with hair dryer to get them on easily - 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 snugly 2 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. Review: Works Great - 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.... ## Features - OXYGEN FLOW RATE: As oxygen flows through, it pushes an indicator up the scale, showing you the flow rate. - VERTICAL INSTALLATION: Mount this flow meter vertically inline with your oxygen system, so oxygen flows up from the bottom. - FLOW-CONTROL KNOB: The flow-control knob lets you open and close the valve at the inlet to regulate the flow rate within the range. - BACK FITTING STYLE: Fittings on the back let you install these flowmeters in instrument panels. Mount them vertically inline with your piping system, so that to avoid the tube tangles and a clean and sleek flowmeter for oxygen. - OTHER GAS MEASUREMENT: This flowmeter is calibrated with oxygen but can be used with other gases. If you’re using these with a gas other than oxygen, you’ll need to calculate the flow rate by multiplying the number shown on the scale by the specific-gravity conversion factor for the gas. - GAS COMPATIBILITY NOTICE: Gas compatibility must be determined by the customer based on the conditions in which the product is being used, including the presence of other chemicals, temperature, and consistency. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B019YS4PSG | | Best Sellers Rank | #94,833 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #51 in Flowmeters | | Customer Reviews | 4.4 4.4 out of 5 stars (78) | | Date First Available | December 30, 2015 | | Item Weight | 2.5 ounces | | Item model number | B4 | | Manufacturer | yqltd | | Material | plastic | | Package Dimensions | 4.41 x 3.11 x 1.42 inches | | Part Number | B4 | ## Images ![Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob - Image 1](https://m.media-amazon.com/images/I/515Qmyu3Q+L.jpg) ![Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob - Image 2](https://m.media-amazon.com/images/I/71eNErJJb2L.jpg) ![Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob - Image 3](https://m.media-amazon.com/images/I/71EHAYJThIL.jpg) ![Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob - Image 4](https://m.media-amazon.com/images/I/61L4oEKuPfL.jpg) ![Oxygen Rotameter | Flow Range: 0-5 LPM | with Flow-Control Knob - Image 5](https://m.media-amazon.com/images/I/71o8IcYpzKL.jpg) ## Questions & Answers **Q: what can be done to get accurate readings? the one i received is 35% low. 4lpm reads 2.5lpm. this is no mistake as i checked it with 4 sources.** A: Throw it away and buy something more substantial. These are junk. **Q: Are the connectors the correct size to use with medical 02 flared female ends of canula & long line?** A: it is a 1/4 fitting on the flow meter. O2 hose is about an 1/8 inch so it is a tight squeeze. Best bet is to get a plastic reducer coupling available on Amazon.com. Get a 1/4 by 1/8 barb reducer and go to you local hardware store and get a 1 foot length of some 1/4 ID clear tubing and couple it that way. You can use small zip ties as hose clamps if you need to. **Q: Can this regulate to a 1L/m flow from a gas cannister that has 2000psia?** A: No would not be safe. you would have to incorporate a pressure regulator between the 2000 PSI and the plastic flow meter. refer the manufacture for the maximum pressure rating. **Q: I am using a 1/4 inch O.D. copper tubing but I am not sure if it could use it to connect with this flow meter** A: Maybe you could use a short piece of rubber or PVC tubing ## Customer Reviews ### ⭐⭐⭐⭐⭐ Heat hose ends with hair dryer to get them on easily *by K***R on September 19, 2020* 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 snugly 2 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. ### ⭐⭐⭐⭐⭐ Works Great *by P***L on April 10, 2021* 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.... ### ⭐⭐⭐⭐ Go with the flow...meter *by D***B on November 30, 2023* 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. ## Frequently Bought Together - CNBTR Oxygen Flow Meter 0-5 LPM Acylic Flowmeter Gas Acrylic Metal Fitting for Oxygen Air Gas Conectrator - JIAWANSHUN Oxygen Air Flow Meter 0.1-1.5LPM Gas Flow Regulator Gas Flowmeter with Copper Connector - Watris Veiyi LZQ-7 Oxygen Air Gas Flow Meter, 1-10LPM Air Gas Flowmeter with Control Valve for Measuring Controlling Gas Flow --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ro/products/25152907-oxygen-rotameter-flow-range-0-5-lpm-with-flow-control](https://www.desertcart.ro/products/25152907-oxygen-rotameter-flow-range-0-5-lpm-with-flow-control) --- *Product available on Desertcart Romania* *Store origin: RO* *Last updated: 2026-09-05*