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Loop Stability
PWM Motor Drives
Power Transformers


Specialising in sophisticated test equipment, particularly related to phase measurement, Newton’s 4th product portfolio includes Frequency Response Analyzers (gain/phase analyzers), vector voltmeters, phase meters, Impedance Analyzers, true RMS voltmeters, Selective Level Meters, Laboratory Power Amplifiers, and Power Analyzers.


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Power Analyzers
Next generation hight performant power analyzers

Combining real-time no gap analysis with high sampling rates throughout all fundamental frequencies, the PPA series of power analyzer’s provide true wideband gapless measurements on any input waveform.

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Frequency responce analyzers

N4L introduce a new generation of versatile measurement instruments that offer leading performance in every mode without the compromise on accuracy or the additional cost that is commonly associated with such flexible instruments. Newtons4th utilise innovative modern technology and unique circuit design in our instruments to achieve such high accuracy without excessive cost.

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Laboratory power amplifiers

The LPA range of Power Amplifiers from N4L provide AC and DC coupled wideband amplfication for a wide variety of industrial and laboratory applications. Designed originally for use with N4L Phase Sensitive Multimeters, they can also be used anywhere where there is a need to boost a signal in either voltage or current. They combine DC accuracy with wide bandwidth to faithfully reproduce complex waveforms, driving loads that may be resistive or reactive.

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Impedance analyzers

When used together with the PSM range of frequency response analyzers, N4L impedance analysis interfaces provide a measurement solution to many impedance analysis applications. The most approriate interface for a specific application will depend upon the nominal impedance of the sample or device being tested and the frequency of measurement

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Selective level meters

Our range of selective level meters includes a entry level bench only model, a general purpose bench only model and a high specification full colour bench/portable communications test set.

    • Address:
    • Matrix Tower
    • 4-6, Racho Petkov Kazandzhiyata Str.,
    • Sofia 1766
    • Bulgaria
    • Sales:
      (+359) 888453698,
      (+ 359) 885181765
    • Tel.: (+359 2) 421 71 98
    • Tel./Fax: (+359 2) 421 71 99
    • sales@neurotex.bg
    • Service:
    • (+359) 889436683
    • (+359) 885945452
    • (+359) 886835124
    • service@neurotex.bg