Amplifier Modules


Here at Digitimer, we provide a vast assortment of Amplifier Modules which are designed to be used varying types of systems. Because we supply a wide range of modules, which are different in the amount of channels they have and their individual capabilities, we are sure you will be able to find something to suit your budget and needs.

Our Extracellular Recording Amplifiers are used to measure electrical motion in living tissue or activity that is coming from nearby cells.

If you are looking for more information regarding our collection of Amplifiers Modules our components that can provide Extracellular Recording then do not hesitate to reach out to our expert, experience team by emailing us at Alternatively, if you visit our contact page to get in touch with us.


NL100AK – Headstage
Differential input, low noise, high impedance microelectrode amplifier headstage for use with NeuroLog preamplifier modules, mainly with the NL104A AC Preamplifier (Extracellular Amplifier). Suitable for extracellular microelectrode recording techniques such as in vitro or in vivo recording. Supplied with NL973A accessory kit.


NL100RK (NL100AKS Headstage & NL100C Stimulus Controller package)
Allowing stimulation and recording through the same electrode, the NL100RK provides an alternative to the NL100AK headstage. The NL100C Stimulus Controller can switch between recording and stimulating modes allowing a stimulus of up to 100V (e.g from our DS2A stimulator) to be applied to the preparation through the recording electrode.


NL102G – DC Preamplifier (Intracellular Recording Amplifier)
The NL102G is a DC preamplifier (Intracellular Amplifier), including matched headstage, designed for intracellular in vitro or in vivo recording. Features include capacity neutralization, current injection, low leakage current and low DC drift. It is particularly suitable for intracellular amplification through high resistance fluid-filled electrodes.


NL104A – AC Preamplifier (Extracellular Recording Amplifier)
The NL104A AC preamplifier is a low noise AC coupled differential amplifier (Extracellular Amplifier). It can be used alone for making in vitro or in vivo recordings from low resistance electrodes or with the NL100AK headstage (or NL100AKS & NL100C) for extracellular microelectrode recording. It can be operated in single-sided (inverting or non-inverting), or differential modes.


NL106 – AC/DC Amplifier
Our general purpose AC/DC amplifier features two continuously variable ranges offering 0 to x10 or 0 to x100 gain. It operates in single-sided (inverted or non-inverting) or differential modes. In DC mode, an offset of up to 2V can be zeroed, this process is facilitated by illuminating LEDs which indicate the position within the range.


NL108A – Pressure Amplifier
The NL108A pressure amplifier module provides two gain settings, one appropriate for blood pressure measurement (1.0V at the output corresponds to 100mmHg pressure at the transducer) and the other for low pressure measurement such as intra-tracheal pressure (100mV at the output equals 1cmH2O at the transducer port). An internal voltage calibrate provides the appropriate deflection (1.0V or 100mV) for these two ranges.


NL109 – Bridge Amplifier
The NL109 Bridge amplifier replaces and improves upon the NL107 Recorder Amplifier which is no longer available. The NL109 is a DC amplifier suitable for making microelectrode recordings (e.g of field potentials) in conjunction with the NL100AK headstage or for making DC measurements with our NL61 or NL62 force transducers or other compatible transducers.


NL120S – Audio Amplifier
The NL120S Audio Amplifier is a power amplifier for driving a 4 or 8 ohm loudspeaker such as the NL985S. It has sufficient power amplification to raise a +20mV signal to a moderate sound level. The module features an input selector for switching between two input signals, and the options of amplifying only positive or negative peaks (useful when baseline noise masks the sounds of nerve spikes of interest).


NL820A – Isolator
The NL820A is the module at the heart of the isolated amplifier range of components, ideal for AC coupled recording applications such as EEG, EMG and ECG in the research environment (the NL820A is not MDD certified). The NL820A is a four channel unit with independent gain and filtering control of each channel as well as a mute facility. The NL820A MUST be used with a preamplifier from the discontinued NL822/4 & NL832/4 ranges or our new NL844.


NL822 – Two Channel AC Preamplifier
The NL822 is a 2 channel AC coupled preamplifier which features front panel control of filter and gain settings. The NL822 needs to be connected to the NL820A Isolator module. The NL822 was designed as an isolated EMG amplifier or EEG amplifier. The 4 channel NL824 preamplifier has now been replaced by the NL844.


NL844 – Four Channel AC Preamplifier
The NL844 is a 4 channel AC coupled preamplifier which replaces the NL824. Unlike the NL824, filter and gain settings are controlled in pairs (i.e channels 1 & 2 and channels 3 & 4 share settings. As well as amplifying 4 channels, the unit can also be operated in a single or two channel mode (channels 1 & 3 or 2 & 4). The NL844 needs to be connected to the NL820A Isolator module. NL844’s are ideally suited as a multi-channel EMG amplifiers or EEG amplifiers.

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