Secondhand Inogen One G3 2.2kg Portable Oxygen Concentrator

Objective AI Report

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Report date: 26.11.2025

Inogen One G3 Portable Oxygen Concentrator Analysis Report

Device Identification

The examined images belong to a portable medical device providing respiratory support and the complementary accessories necessary for its operation. The set consists of one main oxygen-generating unit, a carrying case, power adapters, and a user manual. The overall structure of the device indicates that it is a compact, battery-operated oxygen concentrator designed for portable use.

Brand and Model

The “Inogen” brand and model series indications are clearly visible on both the device’s control panel, the logos on the carrying case, and in the accompanying user manual.

• Brand: Inogen
• Model: One G3

The text “INOGEN ONE G3” is clearly legible in the upper right corner of the control panel. Additionally, the “INOGENONE” logo is located on the bottom part of the device’s protective carrying case. The white-covered booklet provided with the product also features the phrase “INOGEN ONE G3 USER MANUAL”. In light of this visual evidence, the product’s brand is identified as Inogen and its model as One G3 with 100% certainty.

Originality

The brand prints on the product’s casing, the font styles on the control panel, the screen placement, and the accompanying original user manual in the images indicate that the product is an original Inogen production. The stitching quality and the logo-emblazoned design of the carrying case also support the integrity and originality of the set.

Areas of Use

This device is a medical product that filters ambient air to provide enriched oxygen for patients with COPD (Chronic Obstructive Pulmonary Disease) or other respiratory insufficiencies. Its portable design allows patients to continue their oxygen therapy uninterrupted outside the home, during travel, or during daily activities. Its battery operation and inclusion of a car charging kit (DC adapter) indicate its mobility-focused use.

Quantity Information

The number of items in the set shown in the images is detailed below:

• 1 Inogen One G3 Main Device (with battery installed)
• 1 Black Original Carrying Case (with shoulder strap)
• 1 AC Power Adapter (Home charger unit) and Power Cable
• 1 DC Power Cable (for in-car cigarette lighter input – in plastic bag)
• 1 User Manual

General Condition

The cosmetic condition of the device is generally clean and good. No yellowing or significant discoloration has been observed on the plastic outer casing. The main body, in grey and beige tones, appears clean. While the black fabric surface of the carrying case may have slight pilling or dust due to use, no tears or unstitched areas were detected. The device can be evaluated as being in “lightly used” or “clean second-hand” condition.

Physical Deformation

During the detailed examination, no cracks, breaks, or deep scratches were detected on the device’s outer casing (from the angles presented in the images). The metal sieve bed columns at the back of the device appear bright and undeformed. The grilles of the air intake vents are intact. No perforations are visible in the mesh parts of the bag.

Mechanical Components

The metal oxygen outlet (cannula connection point) on the device appears solid; no bending or corrosion is visible. The battery lock latch (blue colored) is in place and appears intact. The air filters at the back are fully seated in their slots.

Electronic Components

The LCD screen on the device’s upper control panel is physically sound; no cracks or leaks are visible on the screen (pixel status cannot be commented on as the screen is off). The button set (On/Off, Alarm, Light, Plus/Minus buttons) is complete and shows no signs of wear.

Accessories

The set includes essential power accessories a user would need:

• AC Adapter: No breaks or crushes are visible on its cables.
• DC Adapter: Inside its plastic bag, its tip is “cigarette lighter” type and appears clean. A “WARNING” label is present on the cable.
• Carrying Case: Zippers and D-rings are intact. Slight dust and thread particles are present on its fabric.
• Manual: The user manual is in an unworn, clean condition.

Battery Status

An integrated, detachable battery is located at the base of the device. The battery in the image is the grey part forming the base of the device. It appears to be of the standard “single battery” (single/standard capacity) size for this model (G3 models also have a higher “double battery” option, but the battery in the image ends relatively flush with the device body). There is no visible swelling or damage to the battery.

Label Information

The images do not contain a detailed close-up of the technical label on the back or bottom surface of the device, so specific data such as serial number or manufacturing date cannot be read. However, the brand logos on the user manual and the carrying case are clear.

Screen Analysis

The device features a monochrome LCD information screen. Since the device is off in the images, no warning messages, error codes, or operating hours information are visible on the screen. The icons on the control panel indicate the device’s operating status, alarm mute, screen light, and flow adjustment buttons.

Size and Compatibility

The device has a compact design, portable with one hand. It is clearly suitable for an adult to carry with a shoulder strap. The cannula outlet has a universal structure compatible with standard oxygen tubes.

Existing Malfunction

During the visual inspection, no broken parts, missing components, or error messages displayed on the screen that would prevent the device from operating were found. Its physical integrity is complete.

Potential Malfunction Risk

The particle filters at the back of the device require regular cleaning or replacement; these filters are installed in the images, but their microscopic saturation level cannot be known. Additionally, the “Sieve Bed” (molecular sieve) columns, which ensure oxygen production, are consumables that need to be replaced over time. Although the clean appearance of the device in the current images suggests it has been maintained, the lifespan of the columns cannot be determined visually. As the general condition is good, no prominent, urgent physical risk is apparent.