Secondhand Maxtec MaxO2 Oxygen Analyzer

Objective AI Report

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Report date: 07.01.2026

Maxtec MaxO2 Oxygen Analyzer Analysis Report

Device Identification

The product displayed is a portable oxygen analyzer. The device consists of a main control unit, an external sensor probe connected to this unit with a coiled cable, and a zippered protective/carrying case that houses the entire set. It is a device used in the field of medical and industrial gas measurement technology.

Brand and Model

A detailed examination of the product’s front face reveals the “maxo2” logo in large blue letters below the screen. Directly beneath this logo is the inscription “OXYGEN ANALYZER”. At the very bottom frame of the device, the manufacturer’s brand name “maxtec” is clearly visible. In light of the visual data, the product’s brand has been identified as Maxtec, and its model as MaxO2.

Authenticity

The product’s body design, the font characters used (especially the typography specific to the Maxtec logo), the icon design on the membrane keypad, and its compatible structure with the original carrying case indicate that the device is an original Maxtec product. There are no visual indications (such as printing errors, incompatible parts, etc.) suggesting it is an aftermarket or counterfeit product.

Areas of Use

The Maxtec MaxO2 is designed to measure the oxygen concentration in a gas mixture. The primary areas of use for this device are:

• Verifying the oxygen percentage at the output of medical ventilators, anesthesia machines, and oxygen concentrators.
• Controlling the gas mixture delivered to patients in intensive care and respiratory therapy settings.
• Analyzing oxygen tank filling rates in diving equipment.

This analyzer is a compatible control and verification accessory for medical devices with an oxygen source or flow.

Quantity Information

A total of 1 (one) set is present in the visual. Set contents:

• 1 Maxtec MaxO2 analyzer main unit.
• 1 sensor probe and coiled cable connected to the analyzer.
• 1 original carrying case.

General Condition

Visually, the device is in “used” condition. There are signs of use on the body, but the device’s integrity is preserved. The active display indicates that the device is receiving power and operating. Since the device has been stored within its protective case, it appears physically clean.

Physical Deformations

No significant cracks, fractures, or dents were detected on the device casing. On the surface where the keypad is located, especially around the power button in the lower right corner, a slight lifting or wear mark is visible on the membrane coating. Minor discoloration (yellowing/beige-ing) that may occur over time on the plastic casing is consistent with normal use.

Mechanical Components

The device’s outer casing, zippered carrying case, and mesh sensor compartment appear mechanically sound. There is no visible damage to the zipper mechanism of the case or the body of the sensor.

Electronic Components

At the time of the visual, the device’s screen is observed to be on. The LCD display is clearly readable, with no signs of dead pixels or screen cracks. The physical placement of the device’s power button and other membrane keys (Up, Down, Calibration) is proper.

Accessories

The device is located within a specially protected black carrying case. An external oxygen sensor is held within a mesh pocket in the left compartment of the case. The sensor is connected to the main unit with a black, flexible coiled cable. No breaks, deformations, or signs of excessive tension are visible on the cable. Although the socket entries cannot be clearly discerned from the visual, the point where the cable is attached to the device appears secure.

Battery Status

The device’s screen is operational, indicating that its internal batteries (typically powered by AA batteries) are still providing energy. However, the battery charge level or the physical condition of the batteries (e.g., leakage) cannot be commented on based on the visual.

Screen Analysis

The text “00.0%” is displayed on the LCD screen. A percentage sign is present in the upper right corner. No “Low Bat” warning is visible on the screen.

Size and Compatibility

The device has a portable (handheld) design, sized to fit in the palm of one hand. It is in the form of a standard medical measurement device.

Existing Malfunctions and Potential Risks

The most significant technical detail in the visual is the screen reading:

• Observation: The device screen shows a value of “00.0%”.
• Analysis: Oxygen analyzers should read approximately 20.9% or 21% oxygen in normal ambient air. The screen showing “00.0%” indicates that the device is not currently measuring ambient air or that there is a problem with the sensor.
• Possibilities:
  • The sensor may have reached the end of its life (oxygen sensors are consumables and deplete over time).
  • The device may require calibration.
  • The sensor probe may be in a closed or airless environment (although the inside of the bag is not considered completely airless).

While the device appears physically sound, due to the “00.0%” reading, it may require a new oxygen sensor or professional calibration before being put into use. This could be a signal of a malfunction or simply an indication that it is time to replace the sensor.