Ring-Based Oximeter to Monitor Patient’s Blood Oxygen and Heart Rate using Nordic BLE SoC

ZG-P11D Medical Pulse Oximeter

MegaHealth has introduced a ring-like Smart Pulse Oximeter powered by Nordic nRF52832 SoC with the Bluetooth low energy connectivity. The device can help access patient’s blood oxygen and heart rate updates 24 x 7 from an app. This ring-based smart pulse oximeter provides a great battery life. The ring can run for more than 20 hours before recharge, and it can be recharged using a common micro USB connector.


The ZG-P11D Medical Pulse Oximeter has passed the trials in the country’s National Medical Products Administration and is being widely adopted by hospitals in China. The pulse oximeter works by measuring the difference in the absorption of red and infra-red light. Deoxygenated blood absorbs more red light than infrared and oxygenated blood absorbs more infrared light than red light. The clip-on device that’s in use worldwide today has been around since the 1970s. The ring-based smart pulse oximeter is the latest innovation in terms of design and solves the same purpose i.e. continuously monitors the key health data such as blood oxygen and heart rate updates of a person.


The Nordic nRF52832 SoC has a powerful 64MHz, 32-bit Arm Cortex M4F processor and acts as the core microcontroller. The 512kB flash memory can store and record the vast data, while the 64kB RAM is enough for the algorithm filtering requirements. The key element of Nordic nRF52832 SoC is that it maintains a balance between power consumption and real-time performance.


The bespoke lithium-ion battery can last more than 20 hours when used continuously. Since it is a wireless device, the monitoring can continue even when a patient is not lying on the bed which means it perfectly monitors oxygen saturation everywhere; this is a feature that is missing in the traditional wired systems.