BIOPAC® Systems, Inc. Logo

Electrode Impedance Checker

Life Science Data Acquisition at its Best

Record high-quality data

Request More Info
View Cart “Electrode Gel – salt free – 250 g” has been added to your cart.
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

EL-CHECK Electrode Impedance Checker

Support

Applications

Downloads/Resources

Knowledge Base

Recommended Items

Spotlight On
fNIR Education System Imager

fNIRS Imaging Education System

fNIRS Imaging Systems are stand-alone functional brain imaging solutions for continuous NIR spectroscopy (NIRS). They provide an in-lab cognitive function assessment and eliminate a great many of the drawbacks of a functional MRI. fNIRS optical imaging technology measures neural activity and hemodynamic response in the prefrontal cortex. Subjects wear an fNIR sensor (IR light sources […]

View All
Latest News

New Citations | Large Group Studies

BIOPAC provides software and hardware that allows research teams to study large group interactions. Here are a few notable studies using BIOPAC equipment for large group research focusing on participation and EDA data. Participation is Key Active participation in education is always thought to lead to better results. Using two groups of six students, TA’s led labs using […]

Electrocardiography Guide Now Available

BIOPAC’s comprehensive Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines for extracting, […]

Read All
Request a Demonstration
Request a Demonstration