Compare 11 polysomnography systems (PSGs) for in-lab sleep studies side by side. Click on the thumbnail above or on “PSG1018” to view the full matrix at a legible size. Sleep Review’s PSG matrix compares specifications for such features as PSG software, lab management software, amplifiers, video, and transducers for the following products: Cadwell Laboratories Inc Easy III with Easy III Software, CleveMed Sapphire PSG, Compumedics USA Inc  Grael HD-PSG Amplifier with ProFusion PSG 3 Software, Natus Medical Inc Natus SleepWorks with Embla NDx, Nihon Kohden America Inc PSG-1100 Sleep System, Philips Respironics Alice 6 DxN with Sleepware G3,Sleepvirtual BW3 PSG, Sleepvirtual BW3 PSG Plus, Somnomedics America Inc SOMNOscreen HD with DOMINO Software, Somnomedics America Inc SOMNOscreen plus PSG with DOMINO Software, and Vyaire Medical Somnostar Software with z4 Amplifier.

A version of this comparison guide was published in the October 2018 issue. If your company is missing, please e-mail editor sroy[at] so you can be considered for the next update.

Find out about the latest product releases at

Information for this guide based on data submitted by product manufacturers. Sleep Review strives for accuracy in all data but cannot be held responsible for claims made by manufacturers. All PSG makers may not be included. E-mail sroy[at] to be considered for the next update.