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

Objective AI Report

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Report date: 26.07.2025

Medwelt 7F-5B Oxygen Concentrator Analysis Report

Device Definition and Intended Use

The device shown in the images is an oxygen concentrator. Such devices separate nitrogen from the ambient air, leaving behind high-concentration oxygen, and are used to provide a continuous flow of oxygen to patients in need of respiratory support. It is a medical device suitable for use in home or clinical settings.

Brand and Model

The brand and model of the product in the image have been clearly identified.

• Brand: Medwelt
• Model: 7F-5B

The brand logo and model number are clearly visible on the front of the device. The general appearance of the device, the quality of the logo and labels suggest that it is original.

General Condition and Physical State

The device is a used product and is in generally good condition. No significant discoloration or yellowing has been observed on its white casing. Apart from small, use-related marks visible upon close inspection, there are no large or prominent deformations. The device appears to have been generally cleaned.

Physical Deformation and Mechanical Components

The physical and mechanical components of the device have been examined in detail:

• Casing: There are no cracks, breaks, or large dents on the plastic casing of the device. There is only a slight scuff mark on the bottom front corner.
• Humidifier Bottle: There is one water humidifier bottle in the transparent-covered compartment at the front of the device. The bottle appears to be intact and clean.
• Flow Meter: The flow meter on the right side, which indicates the oxygen flow per minute, is intact. The L/min (Liters/minute) indicator and the adjustment knob are in place. The flow meter displays a range from 0 to 5 liters/minute.
• Control Buttons: The POWER button and the TIMING adjustment buttons are in good physical condition.
• Oxygen Outlet: The oxygen outlet port, labeled “OXYGEN OUTLET,” is intact.

Electronic Components and Screen Analysis

The electronic components of the device consist of a digital display, which appears to be operational in the image. The display and the information on it are as follows:

• Display Status: The digital display is in working condition, and all pixels on it are clearly visible.
• Operating Hours: On the left side of the screen, under the heading “COUNTS (hours),” the value 03583 is readable. This indicates that the device has been used for a total of 3583 hours.
• Timer: On the right side of the screen, there is a “TIMING (minutes)” section, but no value has been set in this part.
• Indicator Lights: There are green and yellow status indicator lights next to the power button.

Quantity and Accessory Information

The following items have been identified in the image:

• Medwelt 7F-5B Oxygen Concentrator: 1 unit
• Water Humidifier Bottle: 1 unit (attached to the device)
• Power Cable: 1 unit (connected to the device)

External use accessories such as an oxygen cannula are not present in the images.

Current and Potential Fault Risk

Based on the visual inspection, no broken parts, error messages, or apparent malfunctions have been detected on the device. The device appears to be in working condition. However, the operating time of 3583 hours may suggest that certain periodic maintenance or the replacement of consumables, such as filters, may be due. In particular, the performance of the molecular sieves (sieve beds), which are critical for the efficiency of oxygen concentrators, can decrease with usage time. This is not a current fault but merely a projection based on the long operating hours and may require the device to be checked by a specialist.