Secondhand Longfian JAY-5 5L/min Oxygen Concentrator

Objective AI Report

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Report date: 26.01.2026

Longfian JAY-5 Oxygen Concentrator Analysis Report

Device Identification and Product Description

The examined visuals show a medical device and its accessories kept within its original packaging. Based on the “oxygen concentrator” statement on the “Quality Certificate” found inside the box, and the warning texts on the device’s side panel (oxygen purity, filter cleaning, etc.), the product has been definitively identified as an oxygen concentrator.

Brand and Model Information

As a result of detailed examination of the visuals, the device’s identification information has been determined as follows:

• Device Type: Oxygen Concentrator
• Brand: Longfian (This information was confirmed as “Longfian Scitech Co., Ltd” from the manufacturer’s information on the nasal cannula package provided with the device).
• Model: JAY-5 (This information is clearly stated in red ink as “Model: JAY-5” on the Quality Certificate accompanying the product).

Label and Certificate Information

The data on the “Quality Certificate” document found inside the product box and on the nasal cannula package are as follows:

• Device Serial Number: On the certificate, in the “Serial No.” field, there is the inscription 58660215 (or 5S660215 according to the font in the visual, but 58660215 is highly probable given the standard serial number format) starting with the “MZJ” coding, written in red handwriting.
• Product Name: Oxygen Concentrator
• QC Approval: The certificate has a “QC PASS” stamp.
• QC Date: 19-12-2024. This date indicates when the device’s final quality control was performed, and thus its manufacturing or packaging date.
• Nasal Cannula Lot Number: 2409129
• Nasal Cannula Expiration Date: 2029-10-25 (This date is clearly legible on the accessory package).

Accessories and Content Count

The box contents appear complete and packaged, as far as can be determined from the visual. There is a total of 1 main device and 1 accessory pack. The items inside the accessory bag are as follows:

• Air Inlet Filters: 2 black spongy spare air filters are visible.
• HEPA/Felt Filter: 1 green, rectangular filter material is present.
• Nasal Oxygen Cannula: 1 sterile, unopened cannula in a transparent bag. The marking on the package indicates this cannula is L (Adult) size.
• Documentation: 1 Quality Certificate card.

Device Side Panel and Technical Warnings

The information label and control panel on the right side of the device include the following details:

• Warning Texts (Caution): Safety warnings are listed item by item, such as reading the user manual, unauthorized persons not opening the device, cleaning the inlet air filter every 300 hours, and not approaching with cigarettes/fire.
• Performance Information: Oxygen purity is stated to be 93% ± 3%.
• Indicator Lights (LED): The panel contains indications for P.O. (Power On), H.T. (High Temperature), L.P. (Low Pressure), H.P. (High Pressure), and P.F. (Power Failure).
• Buttons: In the lower part of the blue panel, areas for “Timing+” and “Back Light” functions are visible.

General Condition, Originality, and Cosmetic Examination

The visuals show the product resting inside its original cardboard box, supported by white styrofoam (foam) protectors. This indicates that the product is “New”, “Unused”, and “Original”. The accessories being in their own sealed or vacuum-sealed bags, and the certificate appearing clean and new, corroborate this finding.

Physical and Mechanical Assessment

There are no tears, dents, discoloration, cracks, or deformation visible on the product’s outer casing, plastic parts, or labels. The styrofoam protectors are intact and hold the device firmly. No signs of tampering have been found on the device’s visible screws or joints.

Areas of Use and Compatibility

The Longfian JAY-5 is a medical device that takes in ambient air, separates nitrogen from it, and provides high-purity oxygen to the patient. Its primary areas of use include:

• Home oxygen therapy for patients with COPD (Chronic Obstructive Pulmonary Disease).
• For patients suffering from respiratory failure and requiring supplemental oxygen support.
• In situations requiring long-term oxygen therapy in home care services.

The “L (Adult)” marking on the cannula included in the package indicates that the product is currently prepared for adult patients; however, no technical impediment to pediatric use is indicated in the visual, provided an appropriately sized cannula is supplied.

Potential Failure Risk

Since the product appears to be factory-fresh and unused (New Old Stock – manufactured 12/2024), it carries no risk of failure due to physical wear. The condition of the cables and filters is “new”. According to visual inspection, the device is ready for use and its condition is excellent.