Chattanooga Choice Foam Electrodes, 2 x 3.5 Inch Rectangle, Pigtail, Pack of 4

The Chattanooga Choice Foam Electrodes are premium TENS and electrotherapy electrodes designed for superior conformability, conductivity, and multi-use durability. The 0.040-inch-thick hydrogel provides long-lasting adhesion with quick, moderately aggressive tack that maintains firm yet gentle skin contact across multiple applications. The highly conductive carbo film ensures even current distribution, while the soft foam cover conforms flexibly to a variety of body contours and application sites. The patented pictographic electrode liner ensures any user can return electrodes to the correct side of the storage liner for extended usable life. Sold in packs of 4.

Key Features

• Long-lasting 0.040-inch-thick hydrogel for superior adhesion and multi-use performance
• Superior conformability to body contours for consistent skin contact
• Quick, moderately aggressive tack — firm yet gentle for multiple applications
• High re-wettability and dry-out resistance for extended electrode life
• Effective in high heat and humidity conditions
• Highly conductive carbo film for even current distribution
• Soft foam cover — flexible and conformable to a variety of application sites
• Soft molded socket connector for superior lead wire connection
• Highly conductive pigtail wire strands — flexible and durable for multiple uses
• Patented pictographic electrode liner ensures correct electrode replacement every time
• Latex-free construction
• Sold: Pack of 4

Specifications

• SKU: EP85840
• Brand: Chattanooga
• Size: 2" x 3.5" rectangle
• Connector: Pigtail
• Hydrogel Thickness: 0.040 inch
• Cover: Soft foam
• Latex-Free: Yes
• Quantity: Pack of 4
• Country of Origin: United States

Ideal For

These electrodes are well suited for physical therapists and rehabilitation clinicians who use TENS, NMES, or other electrotherapy modalities and need a reliable, multi-use electrode that maintains consistent adhesion and conductivity across multiple patient sessions. The 2" x 3.5" rectangle size is a versatile shape appropriate for a wide range of treatment areas including the lumbar spine, shoulder, knee, and extremities. Patients using home TENS units for chronic pain management will find the high re-wettability and dry-out resistance extend the usable life of each electrode set, reducing replacement frequency. The pigtail connector and soft molded socket ensure a secure, low-resistance connection to standard lead wires, making these electrodes compatible with most clinical and home electrotherapy devices.

Frequently Asked Questions

How many uses can I expect from each electrode?
The number of uses per electrode depends on skin preparation, storage conditions, and application technique. The 0.040-inch hydrogel and high re-wettability are designed to extend electrode life beyond standard electrodes. To maximize longevity, clean the skin before application, return electrodes to the storage liner gel-side down after each use, and store in a cool, dry location away from direct sunlight.

Are these electrodes compatible with my TENS unit?
These electrodes use a standard pigtail connector, which is compatible with most TENS, NMES, and electrotherapy devices that accept pigtail lead wires. If your device uses a different connector type (such as a snap or pin connector), an adapter may be required.

How do I re-wet the electrodes to extend their life?
If the hydrogel begins to dry out, apply a small amount of water to the gel surface and allow it to absorb for a few minutes before use. Do not over-wet, as excess moisture can reduce adhesion. Always return electrodes to the storage liner after each use to prevent drying between sessions.

What does the pictographic liner do?
The patented pictographic liner features a visual guide that shows the user exactly how to replace the electrode onto the liner gel-side down. This prevents the electrode from being stored incorrectly, which can cause the gel to dry out or become contaminated, extending the usable life of each electrode set.