24-Prong Ag/AgCl Comb-Shaped Dry EEG Electrode with 3.9mm Snap Connector
Designed for scalp biosignal acquisition, this comb-shaped dry electrode has 24 contact prongs arranged within a single circular electrode head. The prongs form a distributed contact surface that can reach through hair when the electrode is positioned and held correctly. A 3.9mm snap-style connection at the base allows the electrode to be paired with a matching holder or lead-wire interface.
The 24 prongs belong to one electrode contact assembly; they should not be confused with 24 independent EEG recording channels. This distinction matters when selecting sensors for EEG caps, research headsets and custom electrophysiology equipment. Heymed Medical can review the Ag/AgCl contact specification, prong geometry and snap-side integration against the intended acquisition system.
Comb-shaped electrode head and contact arrangement. Prong spacing, overall dimensions and contact finish are defined by the approved sample.
Why Use a Comb-Shaped Contact on the Scalp?
Hair can prevent a flat electrode surface from making consistent contact with the scalp. A comb-shaped head uses multiple small prongs to distribute the contact area while allowing the electrode to sit between hair strands. This makes the geometry worth considering for dry-contact EEG sensor designs where repeated positioning and manageable setup are important.
Actual recording quality still depends on hair density, electrode pressure, head movement, contact condition, amplifier characteristics and the complete measurement circuit. The comb structure alone does not guarantee a particular impedance, signal-to-noise ratio or gel-free recording result. These factors should be evaluated on the intended headset or EEG cap.
One 24-Prong Electrode, One Snap-Style Connection
The base uses a nominal 3.9mm snap interface so the electrode can be detached from a compatible holder or lead wire. During development, the mating snap geometry, retention force, mounting depth and available clearance need to be checked with the actual cap or headset components.
The 24 prongs describe the contact structure on the skin-facing side. They do not define the number of electrical channels at the snap. In a complete EEG setup, the number of measurement channels comes from the electrode locations, wiring and amplifier design—not from the count of prongs on one electrode head.
For multi-position scalp setups, this sensor concept can be evaluated alongside a 32-Channel EEG Electrode Cap with 10–20 Electrode Positioning, subject to confirmation of holder dimensions and the actual electrical interface.
Reference views of the electrode body and snap connection. Final mechanical fit must be checked using a mating sample.
Ag/AgCl Contact Material and the Complete EEG Signal Path
Silver/silver chloride (Ag/AgCl) is used in electrophysiological electrode interfaces because its electrochemical behavior can be useful for recording small biological potentials. On a dry comb electrode, the material specification must be considered together with the prong shape, contact pressure, surface condition and repeated-use requirements.
Heymed Medical can discuss electrode material and surface-finish requirements during engineering review. Whether a particular contact process, cleaning method or reuse cycle is suitable must be established through product-level testing. No fixed impedance value or biocompatibility result should be assumed without the relevant test data.
Our EEG & EMG Electrodes & Cables range covers other electrode formats and biosignal connection approaches when a comb contact is not the best fit.
Configuration Points for Electrode Development
Electrode type: Single comb-shaped dry-contact electrode.
Contact structure: Circular array of 24 prongs.
Contact material: Ag/AgCl specification subject to the approved material and surface-finish drawing.
Connection: Nominal 3.9mm snap-style electrode interface; mating geometry to be verified.
Mechanical design: Prong height, spacing, tip profile, base dimensions and retention requirements reviewed for the target holder.
System integration: EEG cap or headset mounting, matching lead wire, amplifier input and reference/ground arrangement.
OEM/ODM options: Contact layout, electrode housing, materials, packaging and compatible cable or holder integration, subject to engineering review.
What Should an EEG Equipment Developer Check Before Sampling?
A useful evaluation begins with the electrode position and mounting method. Will it sit in a fabric cap holder, a rigid headset module or another fixture? How much clearance is available around the 3.9mm snap? Can the prongs reach the intended scalp-contact area without excessive pressure? These questions affect both mechanical design and recording repeatability.
For sample assessment, customers can provide a cap holder or headset drawing, mating snap sample, electrode dimensions, expected wearing conditions and acquisition-device requirements. The resulting sample can then be checked for fit, contact consistency, handling and cleaning compatibility under the actual project conditions.
From Electrode Geometry Review to OEM Manufacturing
Rather than selecting an EEG dry electrode by a nominal connector size alone, Heymed Medical can work from a reference electrode, contact-surface drawing or headset design to define the complete mechanical interface. The agreed sample and inspection requirements then guide subsequent assembly and production.
For a project involving custom electrode holders, connectors or matching lead wires, our Medical Cable OEM/ODM Customization service can support coordinated design review and prototype preparation.
Please share the desired electrode geometry, snap mating details, installation method, application environment and expected volume when requesting a quotation. Any clinical performance, patient-contact safety or regulatory claims for the finished product must be supported by the applicable verification and approval process.
Search 
