Digitimer D400 8 Channel Mains Noise Eliminator

The NEW D400 8 channel 50Hz/60Hz Mains Noise Eliminator is a standalone instrument designed for real-time removal of 50Hz or 60Hz mains noise interference, including harmonics, from amplified biological and other signals. Unlike 50Hz/60Hz notch filters, the D400 8 channel noise eliminator can remove mains noise without degrading the signal of interest, even if it overlaps with the mains frequency.

Rapidly evolving multi-channel mains noise removal

The D400 is unique as a multi-channel, standalone mains noise eliminator, which is not incoporated within and does not have to be used in conjunction with any specific electrophysiology data acquisition system. It's now available in a 2, 4, and 8 channel system. While the method of noise removal follows the principles of other single channel devices, such as the Digitimer Humbug Noise Eliminator.

The D400 receives amplified analogue voltage signals (AC or DC coupled) from an amplifier via its inputs and as these signals pass through the D400 noise eliminator remaining in the analogue domain, 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 of the noise are corrected. Additional details on the D400 are available on our website or you can reach out directly to Digitimer North America for support at or call us at (954) 334-1070.

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