Electrical stimulators

Battery powered constant current or constant voltage stimulators

Brief pulses of electricity are used in various biomedical research applications as a stimulus to excite nerve or muscle fibers. In EP research, electrical stimulation is commonly used to elicit somatosensory evoked potentials. Several factors need to be considered to choose the right stimulator for your application.

In order to minimize artifacts introduced into electrophysiological data, it is desirable that the stimulator should be electrically isolated both from ground and from the trigger device.
The voltage required to send current through tissues can vary greatly, making it important to have control over the stimulus driving force.
Large impedance variations during an experiment can result in loss of the stimulus. In this event, a constant current stimulator may be more suitable.

Both of the stimulators we offer meet these important criteria. Review the differences highlighted below to choose the stimulator that best meets your experimental needs.

DS3

Constant current stimulator

Accurate and reproducible stimulus characteristics.
Switchable polarity, variable output and duration ranges (20µs to 2s).
External pulse duration control through the BNC trigger input.
A single-shot button, which operates irrespective of trigger inputs.
Case manufactured from insulating material.
Power provided by standard batteries. Note that current is only drawn during pulse delivery.

DS2A-Mk2

Constant voltage stimulator

Accurate and reproducible stimulus characteristics.
Switchable polarity, variable output and duration ranges (20µs to 2s).
External pulse duration control through the BNC trigger input.
A single-shot button, which operates irrespective of trigger inputs.
Case manufactured from insulating material.
Power provided by standard batteries. Note that current is only drawn during pulse delivery.

Presentation • SuperLab • Response devices • Insert earphones • Electrical stimulators • g.STIMunit

Cortech Solutions

Updated: 12-Jul-2007

Note that our products are not designed for medical use in diagnosis or treatment of disease. We sell scientific equipment to research scientists working in a variety of fields, but we do not offer any products for, nor do we intend for any of our research products to be used for, diagnosis or treatment of disease. Contact us with questions or comments about this web site.