ElecSil™ Dry Electrodes vs. Thread & Gel for EMG/EEG: A Technical Comparison
- Feb 2
- 3 min read
Updated: Jul 24
Why Electrode Technology Matters for Wearable Biosensing
In wearable technology, accurately measuring the body's electrical signals, like electromyography (EMG) from muscles and electroencephalography (EEG) from the brain, is a key challenge. For decades, this has relied on sticky, single-use gel electrodes. While effective, they are far from ideal for continuous, real-world monitoring.
The search for a better solution has led to innovations like conductive threads. However, truly seamless integration requires a new approach. This is where Wave Company's ElecSil™ technology enters the conversation. As a conductive silicone smart textile, ElecSil™ is engineered to overcome previous limitations.
ElecSil™ vs. Disposable Gel Electrodes
The most common method for clinical biosignal measurement uses disposable Ag/AgCl (silver/silver chloride) electrodes. These are considered the "gold standard" for signal quality due to a wet gel layer that creates a stable, low-impedance connection with the skin.
Disposable Electrode Limitations
Gel is cold, sticky, and can dehydrate, degrading signal quality
Adhesive often causes skin irritation, making long-term use uncomfortable
Single-use nature creates significant waste and recurring costs
Impractical for integration into everyday clothing
ElecSil™ Advantages
Eliminates gels and adhesives, avoiding skin irritation
Ultra-thin (less than 1mm), flexible, and moves with the body
Tested to endure over 100 wash cycles
Enables true smart garment integration for continuous monitoring
When a gel layer dries out, the impedance between the electrode and the skin gradually rises. Higher impedance means a worse signal-to-noise ratio, so a reading that looked clean at the start of a session can become unreliable later on. Because ElecSil™ maintains contact without relying on gel or adhesive in the first place, it sidesteps this gradual degradation rather than trying to slow it down.
ElecSil™ vs. Conductive Thread Electrodes
Early smart textiles attempted to solve the problem by weaving conductive threads into garments. While a major step forward, this method has its own technical challenges.
Conductive Thread Limitations
Fine conductive fibers degrade after repeated stretching and washing
Electrical properties can be inconsistent
Significant motion artifacts due to unstable contact
ElecSil™ Advantages
Superior resilience due to bulk material structure
Elasticity maintains stable, conforming skin contact
Highly resistant to corrosion from sweat
A fine conductive thread concentrates mechanical stress at the points where it bends or rubs against other fibers, which is why repeated flexing and washing tend to weaken it over time. A bulk material like ElecSil™ spreads that same stress across a much larger cross-section, so it holds up better under the same conditions. Its elasticity also keeps a continuous plane of skin contact rather than the point-like contact of a woven thread, which is part of why motion artifacts are reduced.
The Verdict: Enabling the Future of Wearables
By creating a stretchable, washable, durable, and biocompatible dry electrode system, ElecSil™ overcomes the core limitations of previous technologies. It provides high-quality signal measurement required for meaningful EMG and EEG analysis without compromising comfort or practicality.
Frequently Asked Questions
How is ElecSil™ different from gel electrodes?
ElecSil™ doesn't rely on gel or adhesive, so it avoids the skin irritation and signal drift that come from a gel layer drying out. At less than 1mm thick and tested to endure over 100 wash cycles, it's designed to be worn and washed like ordinary clothing rather than replaced after a single use.
How does ElecSil™ compare to conductive thread?
Conductive threads are thin and prone to degrading or losing consistent electrical properties after repeated stretching and washing. ElecSil™'s bulk silicone structure is more resilient under the same wear, and its elasticity keeps it in stable, conforming contact with the skin, which helps reduce motion artifacts.
Can ElecSil™ be washed and reused?
Yes. It has been tested to endure over 100 wash cycles, which is part of what allows it to be integrated into everyday smart garments meant for continuous, real-world monitoring rather than single-session clinical use.
What kind of biosignals is ElecSil™ suited for?
ElecSil™ is engineered to provide high-quality signal measurement for EMG (electromyography) and EEG (electroencephalography), aiming to deliver the signal quality needed for meaningful analysis without sacrificing comfort or everyday practicality.
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