All other - 37474. Power Supply External 90 Watt Power Supply. There are two different power supplies for the Air10 devices. Please make sure you double check the name of your machine, to make sure you get the right power supply. Item 37474 - Airstart, Airsense 10 and AircurveST and ASV machines. Item 37344 - Aircurve ST-A and RPS II machines. The Power Suppliesare an external power device that supplies power to your Air10 series machines. Both of the power suppliesinclude the power device itself and a connecting cord. AirStart/AirSense and AirCurve ST-A. ResMed's AirStart, Airsense10 and AircurveST and ASVmachines now have a new lighter power cord, and is item 37474. This lighter cord will be especially handy if you take the machine traveling with you, as this supply is significantly lighter than the previous.However, the AirCurve ST-A Machines will still use item 37344. These machinesare the ResMedmanufacturer's latest lines of CPAP and BiLevel devices. There are six machines in the series, all of which offer top-notch comfort features and the blend of durability and performance you've come to expect in a premiermachine. The AirSense 10 and Airstart, are oneof the most popular CPAP and APAP machines out on the market today. They are very quiet and user friendly. In saying this, make sure you double check which cord you do need, the AirSense 10 and Airstart normally have a black exterior, the Aircurve will normally have silver on the machine. However make sure to read the label on the front of the machine to be sure before ordering. Connection Cord. The item includes a Connection Cord as well as the Power Supply itself. These are compatible with themachines mentioned above. They us a90 watt power supply.. Key Features. Compatible withAir10 devices. Portable Power Supply. Includes AC Cord. AirCurve ST-A machines and RPS II use item 37344. Airstart, AirSense 10, Aircurve ST and ASV use item 37474. Reviewers Tip. The Power Supply cannot be used in a DC configuration. There is a DC compatible cord, which can be seen here: DC Converter 24V 90W for AirCurve ST-A, Airstart/Airsense and Power Station II devices. ResMed AirSense 10 and S9 Machines. FAQ. Can I use the cord from my old S9 machine with this power supply. You can if you are using the battery for AirStart/AirSense andAirCurve ST-A device, Power Station II. The cord is compatible with both lines.