Heart Rate Sensor Sourcing from China
1 resources tagged with "Heart Rate Sensor"
Optical heart-rate sensors in Chinese wearables almost always use a PPG (photoplethysmography) front-end built around parts like the Goodix GH3011 or analog green-LED + photodiode stacks, paired to an MCU on the same module. When we audit a smartwatch line, the sensor sub-assembly is where defects hide: poor LED current calibration and bad optical seating against the skin cause noisy readings that pass at the factory but fail in real wrist use. On a recent 3,000-unit smartwatch order the line held a 0.6% defect rate only after we added a wrist-on bench test to incoming QC.
A heart-rate sensor is the optical PPG front-end (LEDs + photodiode + analog conditioning) that estimates pulse from blood-flow light absorption. The common pitfall is treating it as a commodity drop-in — sensor accuracy depends heavily on the enclosure window, gasket pressure, and firmware filtering, so always validate on the finished device, not the bare module.
Cases (1)
FAQ
What certifications does a heart-rate wearable need for the US and EU?
For consumer fitness use (not a medical claim) you mainly need FCC for the US and CE/RED for the EU, plus RoHS. If you market clinical accuracy or medical diagnosis, that triggers FDA / MDR scope — keep marketing claims fitness-only unless you intend to certify as a medical device.
How do I check heart-rate accuracy before mass production?
Run the assembled units against a reference (chest-strap ECG or a calibrated pulse oximeter) across several skin tones and motion conditions. Build this into your sample approval so you catch optical seating and firmware filtering problems before the production run.
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