NL102G DC Pre Amplifier

NL102G DC Pre Amplifier

£2,003.00 exc. VAT

Manufacturer's Net List Price


  • Input Voltage Range (to output saturation) : ±1.1V.
  • Absolute maximum input voltage range : ±12V.
  • Input capacity neutralization range : 0 to 30pF.
  • Maximum noise level (10kHz bandwidth, referred to input).
  • Zero stability (referred to input) : ±100μV/day.



The NL102G DC Pre Amplifier is designed specifically for biological recording. With features such as capacity neutralization, current injection, low leakage current and low DC drift, it is particularly suitable for intracellular measurements through high resistance fluid-filled electrodes. The input stage, is conveniently located at the end of a 2m cable for direct attachment to a micromanipulator. Other features include electrode impedance check, calibrator, stimulus bridge balance and DC level adjustment. The NL102G DC Pre Amplifier is supplied with the NL412 Pulse box, which acts as a “buzz” control to facilitate electrode impalement.

Compact Remote Headstage
The first stage of the NL102G DC Pre Amplifier is fitted in a metal tube at the end of a 2m cable. This unit is calibrated against the module supplied with it; it is NOT interchangeable with other NL102G modules without re-calibration (the serial numbers on both the headstage and module should match). The central 2mm input socket (+In) is the capacity-compensated signal input through which current can be injected. The shield socket (Shd) is the ‘x1’ output and may be used as a capacitance ground or shield at the preparation. If not required for this purpose it must be left unconnected. NB: this is a major difference between the NL102 and the NL102G DC Pre-Amplifiers. The final socket is the system ground (Gnd) and connection should be made to the preparation via the indifferent electrode. DO NOT ATTEMPT TO USE OVERSIZE PLUGS WITH THE HEADSTAGE SOCKETS, as pins greater then 1.0mm/2.0mm will damage the sockets.

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Product Information

NL102G DC Pre-Amplifier Manual

Intracellular (DC) Recording Application Note

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




Input resistance : 1011ohms
Voltage gain : x1, x10 fixed
Input Voltage Range (to output saturation) : ±1.1V
Absolute maximum input voltage range : ±12V
Gate leakage current : adjustable to zero
Input capacity neutralization range : 0 to 30pF
Risetime (zero source resistance) : 1μsec
(20Mohms source resistance) : 15μsec
Polarization current range* : 0 to ±100nA/50nA/20nA/10nA
Maximum noise level (10kHz bandwidth, referred to input)
(zero source resistance) : 5μV pk-pk (1μV RMS)
(10Mohms source resistance) : 180μV pk-pk (36μV RMS)
Zero stability (referred to input) : ±100μV/day
DC level offset range (referred to input) : ±2V
Output impedance : 600ohms
Output voltage range : ±11.0V
Electrode impedance check (150Hz square wave) : 1mV/Mohms (at +In)
Bridge balance range* : 0 to 100Mohms, 0 to 200Mohms, 0 to 500Mohms, 0 to 1000Mohms
Calibrator : 10mV/100μV 150Hz square wave
External stimulus input range* : ±10V corresponds to ±100nA/50nA/20nA/10nA

* Depending on internal jumper setting


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