BIOPAC® Systems, Inc. Logo

Electrode Impedance Checker

Life Science Data Acquisition at its Best

record data

Request More Info
EL-CHECK Impedance Checker
Part #: EL-CHECK

Use EL-CHECK to measure the impedance between surface electrodes attached to a subject—works on all signal types!

EL-CHECK is suitable for measuring electrode contact impedance for all surface biopotential measurements, including those for ECG, EEG, EGG, EMG, EOG, Bioimpedance and Impedance Cardiography.

The EL-CHECK permits simultaneous connection of up to three electrode leads, for quick impedance checking between any two electrodes in the three connected leads Active (Vin+), Reference (Vin-), and Ground (GND).

See More...

BIOPAC data acquisition
View Spec PDF

Are You Looking for These?

Part #: EL-CHECK
Categories: Electrodes - Education, Electrodes - Research
Subcategories: Accessories - Education, Accessories - Research

Details

Compatibility


check impedance issues to improve signal quality

For best-performing biopotential measurements, the electrode lead impedance between any two electrode leads should be < 5 kΩ. Adequate biopotentials can be obtained with far higher electrode lead impedances, but measurements will be more subject to motion artifact and electrical noise contributions from the surrounding environment.

To obtain electrode lead to lead impedances of < 5 kΩ, it is usually required to slightly abrade the skin surface using a mildly abrasive pad, such as BIOPAC’s ELPAD, and then employ a well-gelled (not dry) surface electrode. If gel has dried, rejuvenate with a small amount of BIOPAC electrode gel (GEL series) on the contact pad of the electrode.

To test the impedance between any two electrode leads:

  1. Prepare the subject – abrade skin, check gel, attach electrodes
  2. Insert the leads into the appropriate connectors on the EL-CHECK
  3. Switch the selector knob to the corresponding position
  4. Press and hold the Test button

The appropriate LEDs (Green, Yellow, Orange and/or Red) will illuminate to indicate the measured electrode impedance. The EL-CHECK is only active when the Test button is pressed.

The EL-CHECK measures electrode impedance through the use of a very small, alternating, constant current. Because alternating current excitation is used, the confounding effects of the electrode/skin junction potentials are removed in order to obtain the most accurate measurement of electrode impedance.

Electrode Impedance Range Indicators: < 5  kΩ, 5-10 kΩ, 10-20 kΩ, 20-30 kΩ, 30-40 kΩ, 40-50 kΩ, > 50 kΩ

Lead Compatibility: Standard female Touchproof (1.5 mm) electrode leads, all BIOPAC electrodes and leads that terminate in female Touchproof sockets, all BN-EL and BN-Adapt series.

Testing Configurations – Switch Selectable: Active (Vin+) to Reference (Vin-), Active (Vin+) to Ground (GND), Reference (Vin-) to Ground (GND)

Videos

Support

Applications

Downloads/Resources

Knowledge Base

Recommended Items

Spotlight On
free BIOPAC webinar

Using Facial Expressions to Understand Behavior

Learn how to collect and interpret facial expressions data with facial coding software called FaceReader, and how to synchronize with other biometric response. FaceReader is an emotion reading software that analyzes facial movements to classify subject response. Facial expressions can be classified as happy, sad, scared, disgusted, surprised, angry, contempt, and neutral.

Register Now
Latest News

NEWS CITATIONS – Heart Rate & Heart Rate Variability, Wingate Anaerobic Test, and Neuroscience of Music

BIOPAC provides software and hardware that allow for research teams to record and analyze respiration activity in physiological experimentation. Here are a few notable studies covering HRV, EMG, and EEG measurement. DON’T STRESS (Jing Wei, Hong Luo, Si J. Wu, Paul P. Zheng, Genyue Fu, and Kang Lee) Humans encounter various stressful situations everyday at work, home, and school. Such stress when experienced at high degrees and/or […]

What makes you laugh the most?

Alan Macy Answers Proust Questionnaire BIOPAC co-founder and R&D Director, Alan Macy, was interviewed recently by Roger Durling for the Santa Barbara Independent. The article, “The S.B. Questionnaire: Alan Macy,” provided a background excerpt of the Santa Barbara entrepreneurs’ past as well as his answers to the Proust Questionnaire. The biomedical technology developed at BIOPAC reflects an ambitious […]

Read All
Request a Demonstration
Request a Demonstration