DS8R constant current stimulator

Muscle and Nerve Stimulation

5 reasons to invest in the DS8R

DS8R constant current stimulator

Need a reliable constant current (CC) stimulator for your latest research?

The DS8R could be the perfect option and the latest addition to our stimulators range. The DS8R is a multi-mode, discrete pulse CC stimulator, designed for use in human research studies and regarded as the first next generation Digitimer stimulator for muscle and nerve stimulation in a lab environment.

Here our experts explore some of the key benefits it has to offer.

5 benefits of the DS8R constant current stimulator

1. Two pulse modes

The DS8R can successfully deliver both monophasic and biphasic current pulses (up to 2ms in duration). And when in biphasic mode, the operator can adjust the amplitude ratio of the stimulus and recovery phases – producing asymmetric biphasic charge-balanced stimuli.

Applying biphasic stimuli in a charge-balanced manner can be beneficial for a couple of reasons. Firstly, it prevents the harmful electrochemical changes which can occur under stimulation sites. Secondly, it’s much more comfortable for the subject – reducing the likelihood of skin irritation and sensitivity, particularly during long periods of muscle and nerve stimulation.


2. External control capabilities

The DS8R is our first stimulator with ‘on the fly’ external controls. The operator can trigger the stimulator and continuously adjust stimulation parameters (e.g. current, duration) via the front panel. But, if they wish, this can also be achieved using the Windows PC control software.

Essentially, the software provides a ‘virtual front panel’, where settings can be easily modified using a connected PC. It also incorporates an API, which allows the device to be controlled using other custom-made or commercially available software packages – such as Spike, Python or MATLAB.

Pulse current amplitude can also be controlled using an analogue voltage signal on the rear.

DS8R control panels

3. Enhanced 300mJ pulse energy limit

Imposed by international standards, the maximum pulse energy for a medical evoked-potential stimulation device is 50mJ. The DS8R has a higher pulse energy limit of 300mJ, which is applicable to therapeutic stimulators. Therefore, as the DS8R was not designed for therapeutic use, it cannot be certified or used as a medical device. However, it can be used for research and, by setting the limit at this value, the stimulator is suitable for a wider range of applications.


4. Safe for human research

The DS8R constant current stimulator has been designed and manufactured specifically for use in human research applications. As such, it is subject to both high voltage isolation tests and electrical safety tests during production and is designed to meet relevant safety standards, including:

  • 60601-1 – General requirements for basic safety and essential performance
  • 60601-1-2 – General requirements for basic safety and essential performance. Collateral Standard: Electromagnetic disturbances – Requirements and Test
  • 60601-1-6 – General requirements for basic safety and essential performance.  Collateral standard: Usability
  • 60601-2-10 – Particular requirements for the basic safety and essential performance of nerve and muscle stimulators


5. Easy to use

Of course, and as with any new research device, before installation, it’s important to read the operator’s manual carefully. This provides a detailed overview of the hardware, configuration process and operation. However, the DS8R is an intuitive device that is very simple to use. A backlit colour LCD on the front panel provides an easy-to-read display for stimulator settings and stimulus parameters. All settings can be modified using the front panel controls or the Windows PC virtual front panel. These settings also persist following power-cycling (i.e. the settings present at power off will remain at start-up).

Find out more about our latest muscle and nerve stimulator


For more information on the DS8R biphasic constant current stimulator – and how it could play a part in your research – please feel free to get in touch. We’re always happy to help and one of our experts will gladly talk you through the features of the stimulator and how it can be of benefit.

If you’re still unsure whether the DS8R is right for you, we can also arrange a free no-obligation trial of the device. Just give us a call on 01707 328347 or send an email to [email protected] and we’ll respond to your enquiry as soon as possible with further details.