ResMed S9 AutoSet

For Reference Only
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Product Details

S9 AutoSet is discontinued and replaced by ResMed AirSense 10 AutoSet .

High End Therapeutic CPAP Machine

The S9 AutoSet is ResMed's premier APAP device. The machine, which uses portable SD cards for convenient data access, comes with features that will help you breathe easier at night. The SlimLine Tube provides optimal airflow in a convenient hose, while ResMed's AutoSet and EasyBreathe technology regulate air pressure throughout the night. The S9 Auto will measure every one of your breaths while you sleep, automatically adjusting the device's pressure to compensate for any irregularities.


ResMed's AutoSet algorithm monitors your airflow on a breath by breath basis. Whenever your breathing slows, such as during apneas, AutoSet mildly increases air pressure based on the intensity and length of the episode. These enhancements provide treatment when you need it most, and pressure will gradually subside as your breathing returns to normal. AutoSet serves as a line of defense against snoring, apneas, and other airflow limitations.

SlimLine Tubing

The S9 AutoSet comes with a SlimLine tube that measures just 15 mm in diameter, the narrowest hose in the industry. Lightweight and easy to use, the SlimLine tube doesn't compromise on performance.

Expiratory Pressure Relief

ResMed's Expiratory Pressure Relief reduces pressure when you start each breath and keeps pressure low through exhalation. This pressure reduction helps make breathing easier by maintaining pressure changes throughout the night, allowing you to draw each breath a little easier.

Enhanced Data Collection

ResMed makes it easy for you to check your data on all of their S9 machines. Easy to use controls and a well lit display screen let you check all of your information on the device itself, or you can opt to access your data remotely with the removable SD card.

Key Features

  • AutoSet - Monitors airflow on a breath by breath basis providing unparalleled pressure relief
  • SlimLine Tubing - 15mm diameter tube reduces tube drag for a lightweight, comfortable feel
  • Expiratory Pressure Relief - Reduces pressure at the inception of each breath and keeps pressure low during exhalation
  • Enhanced Data Collection - Simple menu enables easy access to data, stored on a removable SD card
  • Ramp Feature - Starts pressure at lower levels and gently increases to prescribed levels over a 20min window in 5min increments
  • Automatic Altitude Adjustment - Automatically adjusts pressure in varying altitudes
  • FAA approved


Reviewers Tip:

This is a great device for light sleepers: the Auto's motor emits a soothing, low ambience rumble that won't disturb you or your partner.

ResMed S9 Series: An introduction to the Enhanced Autoset Algorithm


I want to buy the S9 Autoset but I like my tube: is the device compatible with other tube sizes?

Yes. The S9 comes with a 15 mm tube, but is compatible with standard 22 mm tubes.

Can I use a humidifier with this machine?

Yes. All S9 machines are compatible with humidifiers, including ResMed's H5i Heated Humidifier.

Technical Data
1.8 lbs
6.0 x 5.5 x 3.4 inches
Pressure Range
4 to 20cm H2O
0 to 45 minute (@ 5-minute increments)
Starting Ramp Pressure
4 to CPAP/APAP prescribed pressure
2-Year Manufacturer Warranty
Silver and Black
Item Includes
  • Your brand new ResMed S9 AutoSet CPAP Machine
  • A travel bag with a shoulder strap that will safely hold your ResMed S9 machine and accessories
  • The ResMed S9 AutoSet User Manual
  • SlimLine CPAP Tubing
  • ResMed Power Adapter (100v-240v AC auto adaptive; world travel ready)
  • And an SD Card to easily analyze and transport your sleep apnea therapy data
Reviews (4)
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5 of 5 Stars!
Carl H
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I hadn't bought a new machine in years, so maybe I'm impressed with features that are now ordinary. I really liked the LCD display screen and I was able to navigate around well too. Good product, no problems.
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5 of 5 Stars!
TonK P
(Verified Purchase)
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I like it very much. I can separate the humid from CPAP when I travel.
I has used it more than 4 years and no problems.
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5 of 5 Stars!
siriprom p
(Verified Purchase)
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After using this machine about 1 year, my AHI index has reduced from 86 to less than 5.
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5 of 5 Stars!
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Excellent device now two years and excellent sleep excellent industry
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Q&As (2)
Have a question on this item? Ask here and we will answer it in 12-24 hours, usually in a few business hours! Questions and answers will appear here after we answer. You may also have email notifications.
Is this machine new and unused?
Is this machine for CPAP use? Or for APAP?

This machine is for reference only. It has been discontinued by ResMed.

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can I get an instruction book for this machine. I lost my ?

Sorry, we do not have a copy as this machine has been discontinued.

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