Maxtec MAXO2+A Oxygen Analyzer with Internal Sensor

Brand/Manufacturer: MAXTEC INC.
Maxtec MAXO2+A Oxygen Analyzer with Internal Sensor is intended as a tool for use by qualified personnel to spot-check or measure oxygen concentration of a delivered air or oxygen mixture. Durable, compact design that permits comfortable, hand-held operationand easy to clean. Self-diagnostic check of analog and microprocessor circuitry.


  • Maxtec MAXO2+A Oxygen Analyzer with Internal Sensor includes:
    - Users Guide and Operating Instructions
    - Lanyard
    - Threaded Adapter with Tygon Tubing
    - Flow Diverter
    - Blue Tee Adapter
  • Ideal for checking oxygen percent accuracy in concentrators
  • Ergonomic design fits comfortably in hand
  • Features a simple one-touch on or off and calilbration
  • Calibrates to room air (20.9%) or 100% oxygen
  • Oxygen-specific, galvanic sensor that achieves 90% of final value in approximately 15 seconds at room temperature
  • Internal MAX-250+ long life sensor
  • 5,000 and up hours operation on 2 AA batteries
  • Easy one touch calibration, and impact resistant and drip proof
  • Patented ergonomic design fits comfortably in your hand
  • Quickly adapts to bore tube applications
  • Large LCD with 3 digit display
  • Low battery indication

More Information

  • MAX-250 Oxygen Sensor:
    The MAX-250+ oxygen sensor offers stability and extra life. The MAX- 250+ is a galvanic, partial pressure sensor that is specific to oxygen. It consists of two electrodes (a cathode and an anode), a teflon membrane and an electrolyte. Oxygen diffuses through the teflon membrane and immediately reacts at a gold cathode. Concurrently, oxidation occurs electrochemically at the lead anode, generating an electrical current and providing a voltage output. Electrodes are immersed in a unique gelled weak acid electrolyte which is responsible for the sensors long life and motion insensitive characteristis. Since the sensor is specific to oxygen, the current generated is proportional to the amount of oxygen present in the sample gas. When no oxygen is present, there is no electrochemical reaction and therefore, negligible current is produced. In this sense, the sensor is self-zeroing.




Measurement Range




Accuracy and Linearity

1% of full scale at constant temperature,
R.H. and pressure when calibrated at full scale

Total Accuracy

±3% actual oxygen level over full operating temperature range.

Response Time

90% of final value in approximately 15 seconds at 23°C.

Warm-up Time

None required

Operating Temperature

15°C - 40°C (59°F - 104°F)

Storage Temperature

-15°C - 50°C (5°F - 122°F)

Atmospheric Pressure

800-1013 mBars


0-95% (non-condensing)

Power Requirements

2, AA Alkaline batteries (2 x 1.5 Volts)

Battery Life

Approximately 5000 hours with continuous use

Low Battery Indication

"BAT" icon displayed on LCD

Sensor Type:

Maxtec MAX-250+ galvanic fuel cell

Expected Sensor Life

>900,000 O2 percent hours minimum 2-years in typical medical applications

Model Dimensions

3.0"(W) x 4.0"(H) x 1.5"(D) [76mm x 102mm x 38mm]


0.4lb. (170g)


24 months warranty
The MAXO2+ Analyzer is designed for medical oxygen delivery equipment and systems. Under normal operating conditions, Maxtec warrants the MAXO2+ Analyzer to be free from defects of workmanship or materials for a period of 2-years from the date of shipment from Maxtec, provided that the unit is properly operated and maintained in accordance with Maxtec;s operating instructions. Based on Maxtec product evaluation, Maxtec;s sole obligation under the foregoing warranty is limited to making replacements, repairs, or issuing credit for equipment found to be defective. This warranty extends only to the buyer purchasing the equipment directly from Maxtec or through Maxtec;s designated distributors and agents as new equipment.
Maxtec warrants MAXO2+ oxygen sensor in the MAXO2+ Analyzer to be free from defects in material and workmanship for a period of 2-years from Maxtec;s date of shipment in a MAXO2+ unit. Should a sensor fail prematurely, the replacement sensor is warranted for the remainder of the original sensor warranty period.
Routine maintenance items, such as batteries, are excluded from warranty. Maxtec and any other subsidiaries shall not be liable to the purchaser or other persons for incidental or consequential damages or equipment that has been subject to abuse, misuse, misapplication, alteration, negligence or accident.
These warranties are exclusive and in lieu of all other warranties, expressed or implied, including warranty of merchantability and fitness for a particular purpose.

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What is HPFY’s return policy?

Customer satisfaction is our top priority. We stand behind our products. If the merchandise you received is defective or not what you expected it to be, and you wish to return the item, please submit a return request in the My Account section of our website, contact our Customer Service department at (866) 316-0162 / (203) 616-2850 or email us.

  1. Merchandise must be returned within 30 days of the receipt of your order. Returns are not accepted after 30 days.
  2. Items (including parts and accessories) must be returned in new, unused, and resalable condition in its original packaging.
  3. Before returning any product, the buyer must obtain a Return Authorization Number (RA#) from a customer service representative. With your RA# you will receive a prepaid return shipping label.
  4. Orders returned without obtaining an RA# will be entitled to receive only "In-Store Credit" that can be used towards future purchases.
  5. Return orders are subject to a 20% restocking fees.
  6. All custom orders and hygienic items are non-returnable. Refer to the “Non-Returnable Items” section for further details.
  7. Returns will be reviewed and inspected before issuing credit. Please allow 3 to 4 weeks for processing. The credit will be applied to your original method of payment.
  8. If the return is the result of a defective product or shipping error, we will refund the entire purchase amount and return shipping costs.

Which products are Non-Returnable?

Due to the hygienic nature of some items, they are non-returnable. The items listed below are non-returnable:

  1. All hygienic items.
  2. Opened personal care items.
  3. Anything opened, used, or tried on.
  4. All customized items.
  5. Besides these, items that have the “non-returnable” phrase on the website.

We reserve the right to make adjustments due to errors, changing market conditions, product discontinuation or typographical errors in advertisements. Images on the site may not always reflect the actual product. Footrests or leg-rests are not included with wheelchairs unless specified.

How do I receive a return authorization number?

You can submit a return request by logging into your account. You will receive the Return Authorization Number (RA#) details in the email within 2-3 business days.

  • Login to your account
  • Go to “order history”
  • Click on “return order”
  • Fill out the return form and Submit it

If you do not have an email address, we will make other accommodations for RA# Details. Write the RA# on your label affixed to your package prior to shipment.

How long does it take to receive a refund?

Please allow 3 to 4 weeks to process the returns. Once the item is received, and inspected, your refund will be processed and automatically applied to your credit card or original method of payment.

Is there any Restocking Fees?

  1. 20% restocking fees will be applied.
  2. Outbound shipping cost is non-refundable.
  3. For orders that qualified for free shipping, $8.99 will be deducted from the refund if the product is returned.

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