Secondhand Oxytime 7F-5 5L/min Oxygen Concentrator

Objective AI Report

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Report date: 27.11.2025

Oxygen Concentrator and plusMED Nebulizer Analysis Report

Device Identification

The image shows two different medical respiratory support devices. The larger device, with its wheeled structure and panel design, is a stationary type oxygen concentrator. The other device, resting on a small stand in front of the concentrator, is more compact, blue and white in color, and a desktop-type device; its design indicates it is a compressor nebulizer.

Brand and Model Information

Detailed examination revealed the brand and model information for the devices as follows:

• Oxygen Concentrator: No prominent brand logo or model name is present on the front surface of the device. Although its design resembles Yuwell 7F series or similar casings, a definitive brand/model identification could not be made as no brand indication was found or it may have been erased from the device.
• Nebulizer: The plusMED brand is clearly visible on the smaller device. Although the full model code (e.g., pM-N01 etc.) cannot be read from the image, the brand information is certain.

Areas of Use

Oxygen Concentrator: This device is used to provide high-concentration oxygen support to patients by separating nitrogen from ambient air. It is generally suitable for home-based therapy in patients suffering from COPD, pulmonary fibrosis, and respiratory failure.

plusMED Nebulizer: It converts liquid medication into a mist, allowing it to be delivered to the patient’s respiratory tract. It is used in conditions such as asthma, bronchitis, and common colds.

Quantity Information

The image shows a total of 2 units of main devices (1 Oxygen Concentrator and 1 plusMED Nebulizer).

General Condition and Cosmetic Examination

Oxygen Concentrator: The overall appearance of the device is quite worn and fatigued. Significant discoloration (yellowing) is observed on its casing. This yellowing indicates that the device has been exposed to sunlight for a long time or is of very old production. White speckles or dust are present on the black background at the lower left corner of the front panel. The external casing of the device maintains its integrity, but its cosmetic condition is poor.

plusMED Nebulizer: The smaller device appears much newer and cleaner compared to the larger one. No significant fading or damage is observed on its white and blue plastic components.

Physical Deformations and Defects

The beige plastic casing of the oxygen concentrator has unevenly yellowed. This indicates that the plastic material has deformed over time. No mechanical breaks, cracks, or dents were detected visually, but it presents the appearance of an aged device cosmetically.

Mechanical and Electronic Components

Oxygen Concentrator: A mechanical flow meter (flowmetre) is present on the front panel; there is an adjustment ball within a glass tube. On the upper part of the device, there is a mechanical on/off switch (I/O) and a small digital display window showing the operating hours. The wheels are dirty due to use but are in place. A flow adjustment knob (regulator) is present.

Nebulizer: Only the casing is visible externally; there is no indication of mechanical malfunction.

Accessories and Missing Items

The devices appear to be missing accessories:

• Water Bottle (Humidifier) Missing: The recessed compartment on the front panel of the oxygen concentrator is where the humidifier water bottle should be attached, but this part is not present in the image. The device provides dry oxygen in this state.
• Connection Accessories Absent: Vital accessories such as power cables, oxygen cannula, nebulizer mask, air hose, or medication reservoir, which are necessary for both devices, are not present in the image. Only the main units are available.

Screen Analysis

A small LCD panel is present on the oxygen concentrator. This panel usually displays the “Total Operating Hours.” Due to the visual resolution, numbers or warnings on the screen cannot be read, but the presence of the screen has been hardware-detected.

Potential Failure Risk and Assessment

The excessive yellowing on the external casing of the oxygen concentrator indicates that the device’s plastic life might be nearing its end (risk of embrittlement). Furthermore, in such old devices, there is a high probability that the internal zeolite (oxygen-producing mineral) tanks have reached the end of their lifespan. Zeolite tanks can be affected by moisture over time, reducing oxygen purity. Although no clear fault can be identified from the image, the device is highly likely to require maintenance due to its age. The plusMED device, on the other hand, appears cosmetically sound and shows no signs of mechanical risk.