DS2A Isolated Constant Voltage Stimulator (Stimulus Isolator)

The DS2A Mk.II provides a precise Constant Voltage stimulus (up to 100V) controllable in Pulse Duration and Amplitude from self-contained batteries, making it ideally suited to electrophysiological recording in small preparations or cells where low noise is required.  The DS2A can be triggered by an external device such as our new DG2A Train/Delay Generator.  This stimulator is NOT approved for use on human subjects.  The DS2A can be fitted into a 19" rack mounting frame (D121-11) which can hold up to two DS2A's, DS3's DS4's or DG2A's.

DS3 Isolated Constant Current Stimulator (Stimulus Isolator)

The DS3 provides a precise Constant Current stimulus (up to 32mA) controllable in Pulse Duration and Amplitude and as with the DS2A this output comes from self-contained batteries.  The DS3 also features a "clamp" or discharge circuit which discharges the output between stimuli, preventing a charge build up on the preparation.  In other constant current devices this charge build up can lead to a loss of stimulus.  The DS3 can be triggered by an external device such as our new DG2A Train/Delay Generator.  This stimulator is NOT approved for use on human subjects.

NEW DS4 Bi-phasic Stimulus Isolator

The DS4 takes an analogue voltage waveform defined within your own data acquisition/ control system and converts it into an isolated constant current stimulus.  The DS4 will accept several input voltage ranges and produces four output ranges (±10µA, ±100µA, ±1mA and ±10mA).  It also features a GATE input, so that several DS4 units can be controlled by a single analogue waveform, but enabled individually via this GATE input.  A timed "inactivity sensor" reduces battery usage and damaging "leak currents" during infrequent stimulation, while at the same time maintaining low levels of zero crossing distortion for repetitive waveforms.  This stimulator is NOT approved for use on human subjects.

DS5 Isolated Bipolar Constant Current Stimulator (Clinical Product)

This isolated bipolar stimulator will allow computer control of stimulus amplitude and timing parameters and will have a maximum constant current output of ±50mA.  It has been designed to speed up and enhance peripheral nerve diagnostics by facilitating semi-automated nerve excitability tests, but will also have roles in clinical neurophysiology research.  The DS5 is MDD compliant for clinical use within the European Community.   For more detailed information on this device, please refer to the Clinical Products Section.

DS7A & DS7AH HV Constant Current Stimulator (Clinical Product)

The Digitimer High Voltage Stimulator model DS7A (up to 100mA) and DS7AH (up to 1A) provide constant current, high voltage pulses of brief duration for percutaneous stimulation during investigation of the electrical activity of human nerve and muscle tissue.  These stimulators are MDD compliant for clinical use within the European Community and FDA cleared for similar use in the USA.  For more detailed information on this device, please refer to the Clinical Products Section.

D185 MultiPulse Stimulator (Clinical Product)

The D185 is a high power constant voltage stimulator specifically designed for generation of motor evoked potentials in a surgical environment. Transcranial electrical motor evoked potentials (TceMEPs) offer a new and more reliable method of monitoring spinal cord health during risky surgical procedures.  The D185 Cortical Stimulator is MDD approved and is also the only standalone stimulator cleared by the FDA for this application.  For more detailed information on this device, please refer to the Clinical Products Section.

Digitimer D330 MultiStim System

The D330 MultiStim System is a modular and highly versatile multi-channel isolated tissue stimulator designed to be used by biomedical scientists who wish to accurately stimulate a number of low impedance tissue preparations with different voltages or currents.  Ideally suited to multi-channel organ bath /tissue bath pharmacology or stimulated release experiments and where integral timing controls are required.  This is NOT approved for use on human subjects.  More details...

Digitimer NL800A (part of the NeuroLog System)

Using the NL800A constant current stimulus isolator, the NeuroLog system can become a versatile stimulation device.  Note that the NL800A is NOT a standalone device, as pulse or burst duration as well as amplitude MUST be controlled either by the NeuroLog System itself or an external device able to output the appropriate driving voltage.  Further information can be found within our NeuroLog System Section.  This stimulator is NOT approved for use on human subjects.