Secondhand Devilbiss Compact 525KS 5L/min Oxygen Concentrator

Objective AI Report

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Report date: 30.01.2026

DeVilbiss Healthcare 525KS Oxygen Concentrator Analysis Report

Device Identification

The product examined in the visuals is an oxygen concentrator, a medical device designed for patients experiencing respiratory failure or requiring supplemental oxygen support. The device is a portable (mobile) home-use model with wheels and a carrying handle. It features an integrated humidifier bottle unit.

Brand and Model

Upon detailed examination of the product’s front panel, rear label, and control panel, the following information has been identified:

• Brand: DeVilbiss Healthcare
• Model: The REF code on the device’s rear label is specified as 525KS. On the front panel, the general description “5 Liter Oxygen Concentrator” is written. The device is also known in the industry as the DeVilbiss Compact 525 series.

Authenticity Assessment

Considering the print quality of the labels on the product, logo placement, detailed technical data on the rear panel (REF, SN, electrical values), and the “ASSEMBLED IN USA” inscription, the product appears to be an original DeVilbiss production. There are no signs of tampering or subsequent re-labeling on the labels.

Areas of Use

This device takes ambient air, separates nitrogen using molecular sieves within, and provides high-concentration (90% and above) oxygen to the user. Its primary areas of use include:

• Treatment of COPD (Chronic Obstructive Pulmonary Disease).
• Conditions requiring long-term home oxygen therapy.
• Patients with respiratory failure.

Quantity Information

The visuals show a total of 1 unit of oxygen concentrator device and 1 unit of humidifier water bottle attached to this device.

General Condition and State

The device is in second-hand (used) condition. While its casing generally appears sturdy, a detailed examination reveals that the device has not been cleaned for a long time or has been stored in a dusty environment. Significant dust and dirt accumulations are present in the front panel crevices, the humidifier reservoir slot, and the inner parts of the filter cover.

Physical Deformation

Upon examining the device’s outer casing:

• No deep scratches, cracks, or breaks have been detected on the black plastic outer body.
• The labels on the front panel (no smoking warnings, panel inscriptions) are legible; there is no peeling or fading.
• No physical damage (cracks, etc.) is visible on the humidifier bottle and its connection adapter.

Mechanical Components

• Wheels: The wheels located beneath the device appear sturdy, and there is no issue with the device’s stable stance.
• Flowmeter: The ball-type flow indicator (0-5 L/min) on the front right side of the device is intact. The adjustment knob is in place.
• Filter Cover and Filters: Upon examining the filter section behind the device’s rear cover (Image 5), it is observed that the air intake filter (spongy structure) is quite dirty and filled with dust. This indicates a need for maintenance.

Electronic Components

The device’s front panel (Image 4) features electronic status indicators:

• O2 Normal (Green), O2 Low (Yellow), and Service (Red) lights are present. Since the device was off during photography, the activity of these lights cannot be observed.
• An LCD hour counter (operating hours display) is present on the panel, but the operating hours cannot be read from the visual as the screen is off/faint.
• The On/Off switch (I/O) and the “Reset” (circuit breaker) button appear physically intact.

Accessories

• Humidifier Bottle: A blue-capped humidifier water container is attached to the front of the device. The bottle appears empty. The hose connection fitting is in place.
• Power Cable: In the visuals, the power cable is partially seen coiled or hanging at the back of the device, but the plug at the end of the cable could not be clearly examined.

Battery Status

This model (DeVilbiss 525KS) is an AC mains-powered device. It does not have an internal battery, therefore mobile use with a battery is not possible.

Label Information

The technical data found on the rear label (Image 6) and front panel label (Image 4) are as follows:

• Serial Number (SN): B234100077KS
• REF Code: 525KS
• Part Number (Panel): 525DD-331 Rev B
• Electrical Values: 220-230 V~, 50 Hz, 1.55 Amp
• Oxygen Output Values: 5 LPM O2 = 93% ± 3%
• Protection Class: IP21 (Protected against vertically dripping water)
• Origin: ASSEMBLED IN USA (USA assembly)

Potential Failure Risk

The dirty condition of the air intake filter shown in Image 5 is an important detail. A clogged filter can lead to compressor overheating, a decrease in the device’s oxygen purity, or noisy operation. It is strongly recommended to replace the filters and perform a general internal cleaning/maintenance before using the device to prevent potential malfunctions. Other than this, no “imminently breaking” or “hazardous” deformation is observed on the device’s outer casing.

Year of Manufacture

There is no explicit “Date of Manufacture: YYYY” inscription directly on the device. However, the coding structure in the serial number (B23…) might contain year information by the manufacturer. The precise year of manufacture cannot be stated with the currently available visual information.