NEW DS7R High Voltage, Constant Current Stimulator 25th September 201829th July 2020 Digitimer Digitimer DS7R High Voltage Current Stimulator for Human Research Applications Suitable as a general purpose electrical nerve or muscle stimulator for human peripheral stimulation in human research studies, the DS7R provides 0-999mA constant current, high voltage pulses of brief duration for trans-cutaneous stimulation during investigation of the electrical activity of nerve and muscle tissue. The DS7R is specifically recommended for human research applications where its high voltage, high current and flexible pulse duration capabilities are required to provide stimulation to large muscle groups or deep nerves and nerve roots. Higher Output than the DS7A and Greater Pulse Duration Flexibility than the DS7AH The DS7R is almost identical in use and appearance to our DS7AH. The output current is continuously variable over two ranges of 0 to 99.9mA and 0 to 999mA, but where it differs is in relation to the available pulse durations. With the DS7AH, the maximum permitted pulse duration is 200µs, while the DS7R allows up to 2ms*. Because this greater flexibility is only required in human research applications, the DS7R is NOT medically approved and is marketed for human or animal research use only. Designed for Demanding Human Research Applications In relaxing the pulse duration limits, the maximum pulse energy the DS7R can deliver has increased slightly, but is still within safe levels for human use. While the increased output energy takes it beyond the 50mJ limit specified by the international standard applicable to evoked potential stimulators (EN60601-2-40), it is still within the 300mJ limit applicable to electrical stimulators in human therapeutic use (EN60601-2-10). Like the DS7A and DS7AH, the DS7R includes an alternating polarity mode to prevent polarization of the stimulation site and potentially harmful electrolytic effects of longer periods of stimulation. The DS7R can be triggered by an external device such as our DG2A Train/Delay Generator. For human research applications requiring greater flexibility in terms of stimulus parameters and/or external control, please consider our new DS8R Biphasic High Voltage Constant Current Stimulator. For applications that require a medically certified stimulator, please refer to our DS7A/AH High Voltage Constant Current Stimulators, the DS5 Bipolar Stimulator or our D185 MultiPulse Transcranial Cortical Stimulator. DS7R Major Features:- Designed for Human Research Use. Pulse durations from 50µs to 2ms. Up to 999mA constant current output from 400V. Flexible TTL compatible trigger options or front panel push button. Alternating Polarity control – a toggle switch allows the stimulator to operate in +ve, -ve or alternating polarities during stimulation. Output connection accessories, including plugs and cables and electrodes are also available. For more information about the DS7R please visit the dedicated DS7R product page.