ResMed S9 AutoSet

For Reference Only
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  • 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

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.

HCPCS CodeE0601
Basic Features
Warranty2-Year Manufacturer Warranty
ColorSilver and Black
Weight1.8 lbs
Dimensions6.0 x 5.5 x 3.4 inches
Pressure Features
Pressure Range4 to 20cm H2O
Ramp0 to 45 minute (@ 5-minute increments)
Starting Ramp Pressure4 to CPAP/APAP prescribed pressure

Questions? Ask here. We typically respond within 12-24 hours, often sooner. You'll receive email notifications once answered.
1–2 of 2 Questions
Q. Is this machine new and unused?
Is this machine for CPAP use? Or for APAP?
A. This machine is for reference only. It has been discontinued by ResMed.
Q. can I get an instruction book for this machine. I lost my ?
A. Sorry, we do not have a copy as this machine has been discontinued.
Showing 1 to 2 (of 2 questions)

5 star
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1–4 of 4 Reviews
5 of 5 Stars!
Excellent device now two years and excellent sleep excellent industry
6 years ago
5 of 5 Stars!
TonK P Verified Purchase
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.
6 years ago
5 of 5 Stars!
Carl H
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.
10 years ago
5 of 5 Stars!
siriprom p Verified Purchase
After using this machine about 1 year, my AHI index has reduced from 86 to less than 5.
11 years ago
Showing 1 to 4 (of 4 reviews)