D440 2 or 4 Channel Isolated Amplifier

D440 2 or 4 Channel Isolated Amplifier


Manufacturer's Net List Price


  • Portable, standalone design
  • Extremely low noise
  • Rapid recovery from stimulus artefacts e.g magnetic or electrical stimulation
  • AC and DC operating modes
  • Analogue signal output for ultimate compatibility with data acquisition systems



The D440 2 or 4 Channel Isolated Amplifier from Digitimer is a low noise solution for human EMG studies, specifically those related to nerve excitability.

The D440 Amplifier features an amplification range of x100 to x20k. The gain, filter and mode settings for individual channels are adjusted using “virtual front panel” software or other software via a COM interface.

The D440 is available in two versions, the D440-2 – a 2 Channel Isolated Amplifier – and the D440-4 – a 4 Channel Isolated Amplifier. Each channel features a pair of 1.5mm touch proof sockets for active and reference electrode connection, but provision is also made for shielded leads with 5-pin DIN connectors.

Each D440 amplifier is supplied with a signal output cable (D440-OL-xx, D connector to multiple BNC), electrode connection cable (D-440-IL, 1.2m long with 3x 1.5mm DIN42802 sockets for electrode connection and 270 degree 5-pin DIN plug for amplifier connection) and USB cable for connection to the host computer.

For further information you can contact us by sending an email to sales@digitimer.com. If you wish to speak with a member of our expert team you can call us on 01707 328347.

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Product Information

D440 Isolated Amplifier

D440 Control Software

Publications which cite use of the Digitimer D440 can be found on Google Scholar.





  • Mains Lead (Power Cord)
  • Operator’s Manual
  • Electrode Connection Input Lead (D440-IL, one per channel)
  • Output Lead (D440-OL-2CH or D440-OL-4CH)
  • USB Cable (D-USB-F)
  • D440 Virtual Front Panel Control Software (supplied on USB Flash Drive)


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Additional information

Choose an option:

D440 2 Channel Isolated Amplifier, D440 4 Channel Isolated Amplifier