BIOPAC® Systems, Inc. Logo

Electrode Impedance Checker

Life Science Data Acquisition at its Best

Record high-quality 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

EL-CHECK Electrode Impedance Checker

Support

Applications

Downloads/Resources

Knowledge Base

Recommended Items

Spotlight On
haptic transdcuer

Haptic (Tactile) Stimulation Transducer

The TSD190 is a haptic (tactile) stimulator that is ergonomically designed to strap onto a variety of body locations. It incorporates an internal electromagnetically actuated plunger which can be used to mechanically stimulate a 1.5 mm diameter area of skin surface; both plunger force and travel can be infinitely adjusted between zero and a specified […]

View All
Latest News

New Citations | Keeping Students Attentive in an Online Setting & More!

BIOPAC provides software and hardware that allows research teams to record and analyze numerous body signals for physiological experimentation. Here are a few notable studies using BIOPAC equipment for ECG, EDA, and Respiration data. What Keeps Students More Engaged? The question has been brought to the forefront during COVID, what variations of online learning keep students more engaged? […]

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