Apple Watch Series 4 set to get ceramic back and electrocardiogram

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Apple Watch's heart rate monitor is set to get a big upgrade.
Photo: Jim Merithew/Cult of Mac

New details about the upcoming Apple Watch Series 4 have been revealed just days before Apple is set to unveil the upgraded wearable.

One of the most respected Apple analysts in the business just put out a new report that claims the metal back of the Apple Watch will change to a ceramic design. Even better, the watches will come with a new health sensor.

Ming-Chi Kuo told investors today that the ceramic backs will come on all models. The GPS-only model from the Series 3 was the only Apple Watch with a ceramic back until now. Ceramic backs will allegedly allow Apple to put an electrocardiogram on the watch, too.

“The new Apple Watch models will have narrower bezels, support electrocardiography (ECG), and all be equipped with ceramic backs,” Kuo wrote in the note obtained by MacRumors. “We believe the new Apple Watch models will attract more users on supporting ECG. The ECG supplier is Osram (LED design).”

Adding an ECG would allow Apple Watch to detect and predict more health conditions. Previous rumors claimed Apple’s version of the ECG would require the wearer to squeeze the Apple Watch with two fingers. An imperceptible current then passes across the person’s chest, enabling detection of irregular heart rates and other abnormalities.

Apple Watch Series 4

Apple will likely show off the new Apple Watch Series 4 on September 12 at the Steve jobs Theater in Apple Park. We expect the device to include a larger display made possible by slimmer bezels. Better GPS, improved battery life and a speedy new processor reportedly will round out the list of new features.

Leaked images of the Apple Watch Series 4 also revealed some small design tweaks. Apple reportedly changed the Digital Crown, adding a circular outline in the middle of the button. A new microphone hole lies between the Digital Crown and the side button. And the side button will sit more flush with the rest of the body.