Secondhand Medwelt 7F-5B 5L/min Oxygen Concentrator

Objective AI Report

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Report date: 13.01.2026

Medwelt 7F-5B Oxygen Concentrator Analysis Report

Device Identification, Brand and Model

As a result of a detailed visual inspection, the device shown has been identified as an electrically powered oxygen concentrator (oxygen generation device) used for medical purposes. Identification was made through the logo and model number prominently located on the front panel of the device, below the humidifier bottle.

• Brand: Medwelt
• Model: 7F-5B

The device’s brand “Medwelt” is displayed with white text and a medical plus sign on a red background, while the model code “7F-5B” is inscribed in black font on the bottom front part of the device.

Originality and Appearance

Upon examining the print quality of the logo on the product, the layout of the control unit on the front panel, the orderly placement of information labels, and the plastic injection quality, the product is deemed original. The general structure of the device is perfectly compatible with the commonly known 7F-5B casing typology in the market.

Areas of Use

This device is a medical equipment that provides high-density oxygen to the patient by filtering ambient air and separating nitrogen. It is generally used for patients with respiratory conditions such as COPD and asthma, for long-term oxygen therapy at home or in a clinical setting.

Quantity Information

The visuals show 1 (one) main unit oxygen concentrator and 1 (one) humidifier bottle (water reservoir) integrated into the device.

General Condition and State

The outer casing of the device is bright white and has an extremely clean, well-maintained, and “near-new” appearance cosmetically. No noticeable yellowing, deep scratches, dents, or dirt have been detected.

Physical Deformation and Mechanical Components

No cracks, fractures, or dents have been observed on the physical structure of the device.

• Casing: The white plastic casing maintains its integrity, and the joints appear regular.
• Covers and Handles: The grip recesses on the sides of the device and the transparent cover in front of the humidifier bottle are in good condition.
• Wheels: Black wheels located at the bottom of the device are present and appear to be sturdy based on the visual.

Usage Duration and Screen Analysis

The LCD digital screen located on the upper front part of the device has been examined in detail. The screen displays “COUNTS (hours)” and “TIMING (minutes)” labels.

• Counter Value: The digital display on the screen reads “00019”.
• Analysis: In oxygen concentrators, this counter usually indicates the total operating hours (“Total Running Hours”). Based on this data, it can be said that the device has only been operated for 19 hours, thus it is in a “hardly used” or “demo/test operated” condition.
• Lights: A green LED light is illuminated on the I/O (Input/Output) indicator on the right side of the screen, indicating that the device is connected to power and/or in active (standby or operating) mode.

Control Panel and Electronic Components

The control panel is located on the upper front part of the device.

• Buttons: “+” and “-” timer setting buttons, “1-99min” inscription, and a black main power switch (Power Switch – with 0/I positions) are present on the panel. The position of the switch and the cleanliness of its protective plastic cover support the notion that the device has been used sparingly.
• Indicators: Warning icons for potential fault conditions (low pressure, power failure, etc.) are located on the panel (exclamation marks within triangles). In the current visual, no red fault light is illuminated.

Flowmeter Analysis

A flowmeter is located vertically on the front right side of the device.

• Capacity: The scaling is between 0 and 5 L/min (Liters per Minute). This indicates that the device can produce a maximum of 5 liters of oxygen per minute.
• Status: The flow adjustment ball is at the bottom (0 position). The flow adjustment knob is firmly located above the panel.

Accessories and Components

The following components for use have been observed on the device:

• Humidifier Bottle: The water bottle located within the transparent reservoir on the front panel is present. Its black colored cap and connecting tube are on it. The inside of the bottle appears empty and clean, with no traces of calcification observed.
• Oxygen Outlet: On the left side of the device, there is an “OXYGEN OUTLET” labeled port with a white hose connection connector (fitting/Christmas tree adapter) attached to its tip.
• Missing Items: Nasal cannula (nasal tubing) or oxygen mask are not visible in the visuals. Only the device and its fixed components are present.

Labels and Information Plates

A large information label is located on the upper flat surface of the device. Although the texts on the label are not fully readable, it is understood from the diagrams and icons that it contains safety warnings (no open flames, no smoking symbols), operating instructions, and technical voltage information.

Potential Malfunction Risk

Based on the data in the visuals, considering that the device has only been used for 19 hours and the cleanliness of its casing and humidifier bottle, there is no visible wear or potential malfunction risk in the device. The device can be described as “Like New” in terms of its technical and cosmetic condition.