Newtons4th Ltd. (abbreviated as N4L) was founded in 1997 to provide customers innovative technologies and sophisticated analysis of accurate, easy-to-use measuring equipment at a lower cost price than equivalent instruments.

Product flexibility and the incentive to provide customers their desired solutions, resulted in the development of several innovative features in the ever-growing product line. Early 2015, N4L relocated their state-of-the-art development and manufacturing facility to the vicinity of Leicester Centre, England. The new venue encompasses over 2,040 m² (22.050 Ft²) and has a special ‘clean’ production area with environmental control. One section of the new building is assigned to the accredited calibration laboratory.

N4L’s product portfolio includes:

– Power Analyzers
– Frequency Response Analyzers
– Selective Level Meters
– Laboratory Power Amplifiers

The name ‘Newton’ (Sir Isaac) is synonym for the understanding of physical principles. His well-known three laws of nature are so straightforward and obvious, that they are easy to learn and apply. However, they also provide the means to analyze the movement of complex systems. The fourth law for innovation is to build on what has been previously determined.

Newtons4th – innovation based on established fundamental principles
Newtons4th Ltd. is registered ISO9001, the internationally recognized standard for the quality management of businesses. In recognition of the technical innovation and commercial success of the PPA series, N4L was rewarded the ‘Innovation 2010’ Queen award for companies.

For a complete list of N4L’s products, visit their website at


Hans Verhees

Hans Verhees

Victron Energy

We don’t buy measuring instruments, we purchase solutions for specific measurement problems. I like to buy from TTMS, given their knowledge of test solutions in power electronics. I hate sellers. TTMS helps us to make the right choice. They even come up with instrumentation from manufacturers they do not represent themselves. And always with the perfect service: they are not complicated and just arrange what is needed.

Shell Technology Centre Amsterdam

Jan Serné

Shell Technology Centre Amsterdam

In my role within the calibration and quality lab, it is a continuous striving for quality for me. In order to ensure this, the right support from, amongst others, suppliers is essential. TTMS understands this like no other, and I have been doing business with them for years. If I need to describe the business relationship with TTMS, it would be that it’s both constructive and instinctive. The measurement instrumentation is reliable. In addition to this, TTMS’ expertise of test and measuring equipment complements the STCA.


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