BIOPAC® Systems, Inc. Logo

Active Electrodes

Life Science Data Acquisition at its Best

Record high-quality data

Request More Info
Active Electrodes, 35mm
Part #: TSD150A, TSD150B

TSD150 Series active electrodes are designed for multiple-channel surface EMG (sEMG) measurements. The units incorporate a built-in high-gain amplifier with an integral 500 Hz lowpass filter. The unique design allows you to easily convert the surface contact electrodes to fine wire needle electrodes for intricate sub-dermal procedures.

The TSD150 series active electrodes connect directly to the MP System via an AMI100D or HLT100C high-level transducer module. The TSD150 series are very easy to use—locate the position and hold in place with surgical tape (TAPE1).

Electrode Spacing Options

Wide: 35 mm – TSD150A

Narrow: 20 mm – TSD150B

See More...

35 mm Active Electrode
View Spec PDF

Are You Looking for These?

Part #: N/A
Categories: Electrodes - Research
Subcategories: Active - Research




  • A ground is only required if no other BIOPAC amplifier is connected to the subject with a ground lead.
  •  A single ground lead (CBL201 and LEAD110A with EL503 electrode) to the UIM100C is required when using one or more TSD150 series active electrodes without another BIOPAC amplifier.

Conversion to Fine Wire Electrode System

To convert a TSD150 active electrode from a surface electrode to a fine wire electrode system, the stainless steel pads of the surface electrode must be unscrewed from the active electrode case. To accomplish this task:

  1. Grasp the stainless steel pads and rotate them counterclockwise until they are disconnected from the case.
  2. Screw the screw-spring combinations (fine wire electrode attachment) into the holes left by the removal of the stainless steel pads.
  3. Attach the active electrode case (using tape or an elastic strap) to the limb of the subject, near the insertion site of the fine wire electrodes.
  4. Gently bend the springs and place one fine wire electrode in the gap formed by bending the spring.
  5. Allow the spring to return to its upright position and then repeat this procedure for the other fine wire electrode.

Note: If the wire-spring contact does not provide a good EMG signal, it may be necessary to rub the fine wire electrode with an emery cloth to remove the insulation prior to placing the wire in the spring. To convert the system back to a surface electrode system, simply unscrew the screw-spring combinations, place them in a secure place and re-screw the stainless steel electrode pads into the electrode case.




Knowledge Base


Recommended Items

Spotlight On
free BIOPAC webinar

Drag-and-Drop Customized Automation with Workflow

This training shows attendees how to create simple workflows, from opening files, to conditioning and preparing data for analysis, to using AcqKnowledge automated analysis tools for the extraction of meaningful information.

What Is Covered:
– Opening graph files and displaying data
– Channel Management
– Transformations
– Standardized conditioning protocols for analysis preparation
– Analysis routines and custom sequences
– Customized Batch Processing routines for your study protocol
and more…

Watch On Demand

Register Now
Latest News

New Citations | BIOPAC’s AcqKnowledge Software

BIOPAC tools are used for studies in a variety of different fields and disciplines. AcqKnowledge software is one of our universally applicable tools, used by thousands of labs around the world and cited in thousands of peer reviewed publications, such as the following studies… The psychophysiology of guilt in healthy adults. Cognitive, Affective, & Behavioral Neuroscience, 1-18. […]

New Citations | BIOPAC in Human Physiology and 4T|Phys Recap

We had the opportunity to meet lots of researchers at our 4T|Phys Human Physiology Conference this month and demonstrate solutions for life science studies. We presented 39 unique skills sessions, including sessions on measuring blood pressure, recording HRV, and utilizing VR. These studies all apply these skills and further demonstrate how to apply our equipment… Real-Time Personalized Physiologically […]

Read All
Request a Demonstration
Request a Demonstration