The ExG sensor collects data by detecting and amplifying the body’s electrical signals through electrodes attached to the skin. It operates as follows:

– Electrodes: Dry or wet electrodes are commonly used and detect voltage changes occurring in tissues.
– Signal amplification: Amplifies weak signals and converts them into readable forms.
– Signal processing: Processing collected data with AI or software algorithms to derive meaningful information.

For example, detecting heart abnormalities or analyzing brain activity patterns.

ExG sensors are utilized in a variety of areas:

– Healthcare: Cardiac Monitoring (ECG), Cardiac Arrhythmia Detection, and Sleep Research.
– Fitness Track: Measure muscle activity and fatigue during exercise (EMG).
– Mental health care: monitoring stress or relaxation levels (EEG).
– Rehabilitation: Support recovery through muscle activity analysis.
– Games and VR: Delivering immersive experiences using brain waves.


The ExG sensor is a sensor that measures the body’s bioelectrical signals, and detects the electrical activities of the heart (ECG), brain (EEG), and muscle (EMG) through electrodes attached to the skin.

Since these signals are very weak, they are analyzed through amplification and filtering processes, and are used for health monitoring, sleep analysis, and exercise analysis by measuring heart rate, brain waves, and muscle activity.

The wearable ExG sensor has the advantage of being able to easily measure bio-signals in everyday life, although the precision is lower than that of medical devices.

Hey, I just read your post about the ExG sensor. Quick question—how exactly does it “read” what’s going on inside the body? It’s not like it’s poking you, right?

Nope, nothing invasive! It just uses electrodes—either dry ones or the kind with a little gel—to pick up tiny electrical signals from your skin. Those signals come from your heart, brain, or muscles doing their thing.

Gotcha. But aren’t those signals super faint? How does it make sense of them?

Exactly, they’re really weak.

That’s why the sensor has an amplifier to boost them, and then it uses filtering plus software—sometimes even AI—to clean up the noise and make the data readable.

Okay, so it’s not just for doctors? Like, could I use one for fitness or gaming?

Totally. In fitness, it can track muscle fatigue; in gaming or VR, it can even use brain waves for immersive control.

Sure, it’s not as precise as hospital-grade equipment, but the cool thing is you can wear it casually and still get useful insights.

That’s pretty wild. So basically, it’s like having a mini health lab strapped to you.

Exactly—only without the white lab coat and scary machines.