BIOPAC® Systems, Inc. Logo

Ag-AgCl Electrodes

Request More Info
Ag-AgCl TP electrode
Part #: EL254, EL254RT, EL254S, EL258, EL258H, EL258RT, EL258S

Silver-silver chloride (Ag-AgCl) electrodes provide accurate and clear transmission of surface biopotentials. EL250 Series reusable lead electrodes are suitable for most applications (ECG, EEG, EGG, EMG, EOG, and ERS recordings). For best signal performance use shielded electrodes (EL254S or EL258S) as recording electrodes and unshielded electrodes (EL254 or EL258) as ground or reference electrodes. Generally, for each Biopotential amplifier module, two EL254S or EL258S and one EL254 or EL258 are required.

EL250 series reusable electrodes are permanently connected to robust and pliable leadwires (1 mm OD). The leadwires terminate in standard Touchproof connectors. Unshielded electrodes terminate in a single Touchproof connector. Shielded electrodes terminate in two Touchproof connectors, one connects to the Ag-AgCl disk and the other connects to the leadwire shield. Use reusable electrodes with adhesive collars and gel; GEL104 can be used for long-term, non-irritating, monitoring applications.

  • Use EL258 (8 mm recording diameter) for most applications
  • EL254S and EL258S are shielded electrodes; best used as recording electrodes
    • BioNomadix units have no active drive circuit for shielded leads
  • EL258H features a 2 mm gel injection hole, useful for EEG monitoring; use as both recording and reference electrodes
  • Use EL254 (4 mm recording diameter) when closely spaced biopotentials are required
  • Use EL254-RT or EL258-RT for animal MRI setups
See More...

BIOPAC data acquisition
View Spec PDF

Are You Looking for These?

Part #: N/A
Categories: Electrodes - Education, Electrodes - Research, MRI Magnetic Resonance Imaging - Research
Subcategories: Electrodes & Accessories - Research, Ag-AgCl Reusable - Education, Ag-AgCl Reusable - Research

Equivalents
With a different Platform

Details

Compatibility


PARTEL254EL254RTEL254SEL258EL258HEL258RTEL258S
Outer Diameter7.2 mm7.2 mm7.2 mm12.5 mm12.5 mm12.5 mm12.5 mm
Recording Diameter4 mm4 mm4 mm8 mm8 mm8 mm8 mm
Height6 mm6 mm6 mm6 mm4 mm6 mm6 mm
Lead length1 m1.5 m1 m1 m1 m1.5 m1 m

Reusable Ag/AgCl Electrode Features

BIOPAC EL250 Series reusable electrodes incorporate a variety of features which improve biopotential recordings:

  1. Non-polarizable
  2. Sintered to increase electrode/electrolyte contact area
  3. Do not require chloriding
  4. Reusable via resurfacing
  5. High stability recordings, to DC, when used with chloride salt gel electrolyte
  6. Electrolyte gel cavity reduces artifact due to electrolyte/electrode motion and minimizes electrolyte dissipation/drying over long-term recordings

Support

Applications

Downloads/Resources

Knowledge Base

Recommended Items

Spotlight On
free BIOPAC webinar

Ergonomics & Fatigue Series Part II: Cognition & Neuroergonomics

Learn about the tools you can use in neuroergonomics research such as fNIRS, EEG with cognitive state detection, and eye tracking.

You Will Learn:
– Data analysis for fNIRS, EEG, HRV, and eye tracking (including pupillometry, saccades)
– How to perform experiments in VR
– Automation and standardization
– Tips and tricks for getting optimal data quality
– Demonstration
Watch On-Demand

Register Now
Latest News

New Citations | BIOPAC in Ergonomics

Whether using specialized equipment, performing repetitive tasks, or simply going about our daily work routine, the effects of design in our environment as well as the tools we use and the way we use them can impact our health, work performance, and quality of life. Here are a few studies that have recorded and analyzed […]

EDA Guide Available

BIOPAC’s comprehensive EDA Guide provides an introduction to Electrodermal Activity (EDA or GSR) and details topics including: EDA Complex: SCL, SCR, tonic, phasic, specific SCR, non-specific SCR Participant Prep & Electrode Placement Data Recording tips Automated EDA Analysis Routines Digital input to Stim Events Stim-Response Analysis Derive Phasic EDA from Tonic Event-related EDA Analysis Locate […]

Read All
Request a Demonstration
Request a Demonstration