Secondhand Devilbiss Compact 525KS 5L/min Oxygen Concentrator

Objective AI Report

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Report date: 05.01.2026

DeVilbiss Healthcare 5 Liter Oxygen Concentrator Analysis Report

Device Identification

The device in the examined visuals is a stationary oxygen concentrator used for medical purposes. It is an electrical medical equipment that takes ambient air, separates nitrogen, and provides high-concentration oxygen to the user. The device features an integrated carrying handle and wheel structure (though the bottom part is not fully visible, it is understood from the structural integrity). The front panel includes a mechanical flowmeter (debimeter) for adjusting oxygen flow and a humidifier water bottle reservoir.

Brand and Model

Based on the examination of the control panel and information labels on the product, the brand has been definitively identified as DeVilbiss HEALTHCARE. The device’s model is clearly stated on the front panel as 5 LITER OXYGEN CONCENTRATOR. Additionally, the inscription “525DD-331 Rev A” is located at the bottom right corner of the control panel label; this code usually matches part or panel numbers for DeVilbiss’s 525 series (Compact 525) models.

Originality

The device’s outer casing, control panel layout, typefaces used, and the rendering of the DeVilbiss logo are consistent with original manufacturing standards. The “Rx ONLY” (Sold by prescription) inscription and standard safety warning icons indicate that the product is an original medical device.

Areas of Use

This device is used to provide long-term oxygen therapy to patients in home environments or clinics for conditions such as COPD, respiratory failure, or other situations where blood oxygen levels are low. It provides an adjustable oxygen flow rate of 0.5 to 5 liters per minute. A humidifier bottle is connected to the device in the visual; this accessory is used to reduce the drying effect of oxygen and keep the patient’s airways moist.

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

It is clearly visible that the device is a used product. Especially in the 2nd visual, heavy dust accumulation, dirt, and white residues resembling pet hair are present on the top panel, around the handle, and between the buttons. The device requires general cleaning and detailed maintenance. The presence of an AdaptHealth label indicates that the device might have been previously used as a rental unit.

Physical Deformation

The device’s outer casing is made of black hard plastic.

• Surface scratches and scuff marks are present on the casing, particularly around the top carrying handle and the control panel.
• No noticeable deep cracks or breaks have been detected in the plastic components; the casing’s integrity is maintained.
• There are no signs of slight lifting or wear at the edges of the panel label, but there is a heavy layer of dirt on the surface.

Mechanical Components

The mechanical controls are as follows:

• Flow Meter (Flowmetre): On the front panel, there is a black ball indicator inside a glass tube. The scale ranges from 0 to 5 L/min. Its mechanical integrity appears sound.
• Adjustment Knob: Directly above the flow meter, there is a black rotary knob that adjusts the oxygen quantity.
• Lock and Cradle Mechanism: The cradle where the humidifier bottle sits and the securing strap (hook-and-loop fastener or elastic band) appear intact.

Electronic Components

The visuals do not show any light or active screen display indicating that the device is operational (the device is off).

• Switch: There is a main power switch with “I/0” positions on the front.
• Reset Button: Next to the flow meter, there is a circuit breaker button labeled “RESET” and “5 AMP”. This button is physically in place.
• Indicators: On the top panel, there are LED indicator areas for Oxygen, Service, and Low Oxygen status (their status is uncertain as the device is off).

Accessories

Accessory attached to the device:

• Humidifier Water Bottle: A transparent water bottle is attached in the front slot of the device. A small amount of water is visible inside the bottle. The bottle cap is cream/white colored and has a hose outlet (nipple). This bottle is a consumable item and may need to be replaced for hygiene reasons.
• Cables: A black power cable partially visible emerging from the back or top of the device, but the cable’s end and plug are not clear in the visual.

Battery Status

The DeVilbiss 5 Liter model is typically an AC (mains electricity) powered device. It does not have an internal battery. Therefore, it should not be confused with portable battery-powered models; it only operates when plugged into an outlet.

Label Information

The label data identified on the product are as follows:

• Top Barcode/Serial Label: On the top right edge of the casing, there is a white label inscribed with “B211030195DS”. This is likely the device’s serial number or inventory tracking code.
• Panel Code: The control panel label reads “525DD-331 Rev A”.
• Ownership Label: On the bottom part of the humidifier reservoir, there is a silver-colored label stating “This equipment is property of +adaptHealth” and including the phone number “757-496-2030”.
• Guide Label: At the very bottom, a table-shaped information card titled “+adaptHealth Oxygen Concentrator Guide” containing brief instructions for device use is affixed. It contains areas that appear to be filled in handwritten form but are unreadable due to blurriness (such as date/technician notes).
• Warning Symbols: “No smoking”, “Keep away from fire”, and “Do not use oil/grease” (due to explosion risk) warning icons are clearly visible.

Screen Analysis

On the device’s top panel, there is a small LCD screen area (next to an hourglass icon) that displays the total running hours. However, since the device is off, no numbers or data are visible on the screen.

Year of Manufacture

A clear “Date of Manufacture” label is not readable in the visuals. However, the type of label and the overall casing of the device resemble current models. The serial number starting with “B21…” might indicate the year 2021 according to the manufacturer’s coding system, but this is not definitive information, rather a possibility based on code interpretation logic.

Potential Malfunction Risk

There is no visual evidence of an electronic or motor malfunction in the product. However, the heavy dust and especially pet hair/fur accumulation mentioned in the “General Condition” section are significant risk factors.

• Risk Analysis: Oxygen concentrators operate by drawing in air. This heavy contamination on the exterior of the device increases the likelihood of internal filters (HEPA and felt filters) being clogged. Clogged filters can lead to device overheating, a drop in oxygen purity (below 90%), or compressor strain. The device must undergo professional maintenance and filter inspection before use.