Secondhand Respirox 7F-3 3L/min Oxygen Concentrator

Objective AI Report

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Report date: 11.12.2025

Yuwell 7F-3 Oxygen Concentrator Analysis Report

Device Identification

The device analyzed in the visuals is an oxygen concentrator used for medical purposes, which separates oxygen from ambient air and provides high-purity oxygen to the user. The device is designed in a vertical form, with wheels, and is a medical equipment manufactured for stationary use.

Brand and Model

The model code “7F-3” is clearly readable on the front face of the product. The label on the back contains the manufacturer information as “Jiangsu Yuyue Medical Equipment & Supply Co., Ltd.”. This manufacturer is known worldwide under the “Yuwell” brand. In accordance with the labels and codes on the device, the brand of the device has been definitively identified as Yuwell (Jiangsu Yuyue) and the model as 7F-3.

Authenticity

Examining the print quality of the labels on the device, the regular placement of the manufacturer’s logo and CE certification marks (CE0123), and the molding craftsmanship of the casing, it is observed that the product is an original Yuwell production. The original manufacturer’s label is present.

Areas of Use

This device is used to provide long-term oxygen therapy (oxygen therapy) for patients with COPD, asthma, heart failure, or respiratory failure in a home environment. It operates on electricity, takes air from the room, separates nitrogen, and produces oxygen with a purity of 90% or higher.

Quantity Information

The visuals show 1 (one) oxygen concentrator device. The device’s power cable is integrated with the device.

General Condition

The cosmetic condition of the device is moderate. There are noticeable signs of aging due to use. It is understood from the color changes on its outer surface that the device is not new and has been actively used.

Physical Deformation

The most noticeable physical condition on the device’s outer casing is the intense yellowing of the plastic. The color tone difference between the front panel and the side panels is significant; the front part has turned to a beige/yellow tone due to sunlight or heating over time, while the side panels are a lighter cream color. Limescale and sediment accumulation have been observed inside the humidifier bottle (water tank). No deep cracks or breaks have been detected on the casing, but there is general dirtiness and wear.

Mechanical Components

The 4 wheels located at the bottom of the device are in place, and no breakage is observed in the handle mechanism that provides the device’s portability. The cable winding hook at the back and the flowmeter adjustment knob (regulator) at the front appear physically sound. However, the front cover (filter or water tank protector) is made of transparent plastic and shows dullness and signs of use.

Electronic Components

The LCD screen on the front panel appears physically intact, but due to the device being off, no comment can be made regarding its pixel status. The on/off switch and timer buttons are in place. No visual crushing, breakage, or insulation damage has been detected on the power cable; the cable is gathered with a hook-and-loop strap.

Accessories

The humidifier bottle (water container) is attached to the device. The device’s power cable is with the device. However, consumables such as a nasal cannula (nasal tube) or mask for patient use are not present in the visuals. The water container lid and connection elbows appear to be present.

Battery Status

This model (Yuwell 7F-3) is a device that typically operates on mains electricity. It does not run on an internal battery. No external power source or battery pack is present in the visuals.

Label Information

• Manufacturer: Jiangsu Yuyue Medical Equipment & Supply Co., Ltd.
• Product Description: Oxygen Concentrator / Oksijen Konsantratörü
• Model: 7F-3
• CE Mark: CE0123 (Medical device certification)
• Serial/Lot Information: A barcode and serial number label is present, but the number is not at an angle where it can be fully read.

Screen Analysis

A digital display panel is present on the device’s upper control panel. Around the panel, the phrases “COUNTS (hours)” and “TIMING (minutes)” are located. This indicates that it displays the device’s total operating hours and current therapy duration. Additionally, there are error/warning icons (places for green, yellow, red LED indicators) on the panel.

Size and Compatibility

The device’s model code “7F-3” is generally used for models that provide a maximum oxygen flow of 3 liters per minute. Although the flowmeter scale in the visual is marked within the 1 to 5 L/min range, the efficient oxygen production capacity of this model is technically in the 3-liter class. It is suitable for adult use. It is of compact home-use dimensions.

Year of Manufacture

The manufacturing date is clearly stated as 26.09.2016 on the label on the back of the device.

Documents

No invoice, warranty certificate, or user manual was found in the visuals. As the year of manufacture is 2016, it is certain that the device’s warranty is no longer valid.

Duration of Use

Since the digital screen is off, the exact operating hours (“total hours”) cannot be read. However, the degree of yellowing of the casing and the sediment in the water container indicate that the device has been used for a long time and intensively.

Current Fault

No obvious breakage (button detachment, casing disintegration, etc.) that would prevent the device from operating was detected during the visual inspection. However, the heavy contamination in the water container is the biggest indicator that it requires maintenance.

Potential Fault Risk

The layer of white sediment inside the device’s water container (humidifier bottle) carries the potential to cause limescale or blockages in the system. Furthermore, considering the device’s year of manufacture (2016) and the color change on the outer casing, there is a possibility that its internal filters (HEPA and intake filters) and zeolite tanks may be full or have reached the end of their lifespan. Before the device is put into use, it must undergo detailed maintenance such as filter replacement and oxygen purity measurement by an authorized service.