D400-8 being used with D360 amplifier

Receive a 20% Discount on a D400 50/60Hz Noise Eliminator

when purchased with one of our Multi-channel Isolated Amplifiers

Are you recording multiple electrophysiological signals and struggling with 50/60Hz mains noise that you can’t seem to remove?

Historically, stubborn issues with 50/60Hz mains-related interference that traditional methods couldn’t solve were only rectified through the use of destructive notch filters, or perhaps a Hum Bug Noise Eliminator.  However, as the Hum Bug is a single-channel device, it becomes a costly proposition when adding active noise elimination to a 2, 4 or 8-channel amplifier.

With the launch of the Digitimer D400 Noise Eliminator,  Digitimer provided a solution for researchers making multi-channel recordings, which works brilliantly and is extremely cost-effective.  Rather than spending many hours trying to identify and remove sources of mains noise, the D400 allows you to remove problematic 50/60Hz interference, non-destructively, and within seconds of connecting a signal of interest.

D400 Noise Eliminator Family

Cost-effective multi-channel noise elimination, now at a discount!

The cost-effective nature of the D400 is illustrated by respective savings of 20%, 45% and 65% when purchasing a two, four or eight-channel D400 instead of the equivalent number of Hum Bugs.  The D400 is the perfect partner for our D440-2, D440-4 and D360R-4 research amplifiers, as well as the medically CE approved 8-channel D360.

Plus, until the end of May 2024, Digitimer Ltd in the UK is offering a 20% Discount on our D400 Multi-channel Noise Eliminators, when ordered with one of our D440-2, D440-4, D360 or D360R-4 isolated amplifiers.  There hasn’t been a better time to upgrade your amplifiers and add cutting-edge active noise elimination at the same time!

If you are unfamiliar with the D400, keep reading to learn more about this innovative active noise-removal solution.

D400-8 being used with D360 amplifier
D400-8 Noise Eliminator being used with a Digitimer D360 for 8 channel EMG recording/MEPs (photo kindly provided by Dr Claudia Ammann, HM CINAC, Madrid, Spain)

The D400 gives multi-channel 50/60Hz mains noise removal without destructive notch filtering

While the method of noise removal follows the principles of other single-channel devices, such as the popular Hum Bug Noise Eliminator, the hardware and software algorithms used by the D400 have been developed wholly by Digitimer and are unique to this device.  For those unfamiliar with the concept of operation, the D400 receives amplified analogue voltage signals via its inputs and as these signals pass through the D400 noise eliminator, it rapidly constructs a phase-locked “mains noise template” and subtracts this from the original signal. Noise removal occurs in real-time and the noise template evolves constantly so that any changes in the amplitude or other characteristics are corrected for. Importantly, the signal pathway through the D400 is analogue throughout i.e. the input signals are not digitised at any point, thus preserving data integrity.

Not only does the D400 remove mains noise in the 50Hz to 60Hz frequency, but it is also effective at removing associated harmonics of these frequencies. Importantly, and unlike standard mains Notch filters, this method of noise removal is not detrimental to signals of interest within the 50-60Hz frequency range.

Features of the D400:-

• Cost-effective, Multi-channel Noise Removal
• Cancels Out 50/60Hz Mains & Harmonics
• 2 Channel, 4 Channel and 8 Channel Versions
• Easy to Use, Portable & Standalone
• Analogue Signal Path with No Degradation

If you would like to learn more about the D400, arrange for a demonstration/trial or request a formal quote, please do not hesitate to get in touch with us.