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

Objective AI Report

Disclaimer: I am Medbidding AI. I am an unbiased AI robot. I have generated the following report automatically (without human intervention). The report was prepared by examining only the product images in the ad in detail. The report may contain errors. Medbidding and other parties disclaim any liability that may arise from this report or reliance on its contents. If you have any questions or notice an error in the report, please contact Medbidding engineers.

Report date: 05.02.2026

7F-3 Model Oxygen Concentrator Analysis Report

Device Identification, Brand and Model Analysis

The product in the examined image is an oxygen concentrator, a medical device that separates oxygen from ambient air and provides high-purity oxygen to the patient. A detailed examination of the product’s front face revealed the following identifying elements:

• The model number 7F-3 is located in the lower-middle part of the device along with a prominent logo. This model code belongs to the standard medical-type oxygen concentrator series known in the market.
• The middle body of the product features the phrase OXYGEN CONCENTRATOR in English, indicating what the device is.
• On the panel, the phrases OXYGEN OUTLET, FLOW METER, and the flow unit L/min (Liters/Minute) are technically defined.

Areas of Use

This device is designed for patients with COPD, respiratory failure, or low blood oxygen saturation to receive long-term oxygen therapy at home or in clinics. The device operates on electricity and filters ambient air to deliver oxygen to the patient.

Originality Status

Considering its casing structure, labeling standards, control panel layout, and the materials used (LCD screen, flow meter tube, warning lights), the product appears to be an original medical device manufactured to industrial standards. No signs of homemade construction or modification were observed.

Quantity Information

The number of devices analyzed in the image is 1 (one). Other boxes and medical equipment parts visible in the background have been excluded from the analysis.

General Condition and Physical State

A detailed examination of the device’s external cosmetic condition reveals the following points:

• Color Change (Yellowing): A distinct difference in color tone is observed in the plastic material of the device’s upper control panel section and cover. While the lower body remains white, the upper plastic components have turned a “beige/yellow” color over time, likely due to exposure to light or heat. This is the most prominent sign indicating that the device has existed or been in use for a long time.
• Wear and Tear: Friction marks and slight stains are present on the lower corners of the casing and the body parts above the wheels, indicative of use.
• Cleanliness: Dust and stains, presumably resulting from storage conditions, are visible on the device’s surface. It requires a detailed external cleaning.

Accessories and Missing Parts

Part deficiencies that could directly affect the device’s functionality have been identified from the image:

• Humidifier Water Bottle (Missing): The humidifier water bottle, which should be located in the middle section of the device behind a transparent cover, is missing from its slot. This part is a critical accessory that ensures the oxygen is humidified before being delivered to the patient.
• Cannula and Mask: No hose, nasal cannula, or mask, which should be attached to the oxygen outlet, is present in the image.
• Cables: The device’s power cable is not clearly displayed in the image (it might be coiled at the back or missing).

Mechanical and Electronic Component Analysis

Based on visual data, the condition of mechanical and electronic components is as follows:

• Screen and Panel: An LCD information screen is present on the upper part. To the left of the screen, the phrases COUNTS (hours) and TIMING (minutes) indicate that the total operating hours and timer can be tracked. Additionally, “+/-” buttons, a Power switch, and warning LED indicators are present. The buttons are physically in place.
• Flow Meter: The tubular gauge (flow meter) located on the right side appears intact. The adjustment knob (regulator) beneath it is present. The scaling is visible from 1 to 5 liters, and the black ball level is at the lowest (zero) point.
• Wheels: Some of the wheels that enable the device’s mobility are visible at the bottom of the image.
• Oxygen Outlet: A metallic “OXYGEN OUTLET” port is present on the left side, but immediately below it, there is a yellowed round sticker or sealing plug.

Battery and Power Status

This type of device (Oxygen Concentrators) typically operates with mains electricity (220V) and does not contain an internal battery system. From the casing structure in the image, it is understood that the device is a “home-use stationary” model rather than a “portable battery-powered” model.

Existing Malfunctions and Potential Risks

The risk assessment obtained from the visual analysis is as follows:

• Critical Deficiency: The absence of the humidifier water bottle indicates that the device is not immediately ready for use in its current state. This part must be acquired before use.
• Cosmetic Risk: The intense yellowing of the upper plastic components suggests that the material has aged and may have lost its flexibility, becoming more brittle.
• Mechanical Condition: No noticeable body damage such as breaks, cracks, or dents (other than the significant yellowing) has been detected on the device. However, since the device is not shown in operational condition, there is no visual evidence regarding compressor pressure or oxygen purity.

Label Information

The technical and identifying texts legible on the front face of the device are as follows:

• COUNTS (hours)
• TIMING (minutes)
• 1-99min (Timer range information)
• OXYGEN OUTLET
• OXYGEN CONCENTRATOR
• L/min (Flow unit)
• 7F-3 (Model Code)