Differential Amplifier (DP-301)

Differential Amplifier (DP-301)
 3.7/5.0 (1 review)

Warner Instrument Corp.

The DP-301 is a single channel AC/DC differential pre-amplifier highly suited for EEG, EKG and extracellular recording. High input impedance High common mode rejection Low noise with h...read more

Request Pricing

Receive your quote directly from Warner Instrument Corp. for Differential Amplifier (DP-301)

Warner Instrument Corp.


Elizabeth Macmurray


See all reviews
Member since 2013

University Of Alaska Fairbanks
Read more »

  • 5 out of 5EASE OF USE
  • 3 out of 5VALUE FOR MONEY

Review date: 02 Dec 2013

Application Area: Whole Nerve Recording
Differential Amplifier (DP-301)

"Product has never broken down in the past two years of using it and I’ve never had any problems with it. I would recommend but I am not sure if they're other products for better price."



The DP-301 is a single channel AC/DC differential pre-amplifier highly suited for EEG, EKG and extracellular recording.

  • High input impedance
  • High common mode rejection
  • Low noise with high gain
  • High tolerance to DC offsets
  • Bandwidth filtering available

High Input Z, High CMR

High common mode rejection is very important in minimizing electrical interference. The high input resistance of the DP-301 (1012 ohm typical) ensures that the instrument's high CMR will not be degraded by differences in source impedance at the input. This is important in extracellular recording, where the difference in resistance of the recording and indifferent electrode is often large.

High DC Tolerance

Extracellular action potentials are typically measured in microvolts but are usually accompanied by much larger DC electrode voltages. The DP-301 is designed to amplify these microvolt level events with as much as ± 3 VDC at the input.

High Gain, Low Noise and Bandwidth Limiting

Gain selections of x100, x1000 and x10000. Microvolt signals are sufficiently amplified for computer data acquisition and recorder inputs. Noise is very low, typically 10 µV p-p at 1 Hz to 10 kHz bandwidth. Reducing the bandwidth with the low pass and high pass filters further lowers noise.

Calibration Signal

The internal Cal signal provides a convenient check of amplifier gain and operation.

Battery Powered/Portable

The single channel DP-301 is powered with 4 standard 9 V transistor batteries yielding approximately 500 hours of normal operation. The small size of the DP-301 makes it possible to be placed at the measurement site or inside a Faraday cage. End of battery life is indicated by the Low Bat light.

Input Cables

The standard IC-2S input cables (2 per channel) which are not terminated at the outboard end. Optionally available are cables with 2 mm pin and alligator clip (p/n IC-4M). There is no additional cost if specified at time of order.
IC-4M Cable pictured at right


Request info

To:Warner Instrument Corp.
Please contact me / call me with the Differential Amplifier (DP-301),

I am looking to purchase in /

About you

Write a review

Sharing your experience will help scientists like you. Achieve Reviewer Status and Win an iPad air (All reviews published will be entered into the next drawing on May 30th 2014).

Your Email


Ease of use

After sales services

Value for money

The benefits of becoming a reviewer
Share your opinions...()
Give reasons for the star ratings you have awarded for each area.
Would you recommend this to a colleague?
What would you like to have known about equipment and consumables before you purchased?

Why make an enquiry with SelectScience?

  • EASY It’s quick and simple to do
  • FAST Your enquiry will be delivered straight to the manufacturer
  • FREE You’re under no obligation
  • SECURE We only pass your details on to trusted suppliers at your request
  • SAVE TIME Submit your details once and make multiple enquiries
SelectScience Trusted Banner