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Now, in 2018, the USTER evenness tester Sensor CS, the speed, range and precision of
celebrates its 70th anniversary, marking decades of measurements is greater than ever. A new hairiness
unprecedented success. Over 16,000 USTER® length (HL) sensor combines with OH results to
Testers have so far been sold in 65 countries. And allow full control over yarn hairiness, while the OM
thousands of operators all over the world depend
on its key values – the familiar U% and CVm results.
USTER® TESTER 6
Foundation for USTER® STATISTICS
The USTER® GGP sparked a new interest in
Destined to be the heart evenness testing by spinners, and led to requests
for further quality management tools. The response
of the spinning mill was the publication in 1957 of USTER®
STANDARDS, the precursor of USTER® STATISTICS.
This listed unevenness data as U% and CV figures for
carded and combed yarns, from GGP® test results
For seven decades the USTER® Tester has been the collated worldwide. For the first time, spinners were
indispensable driver of quality in yarn manufacturing able to benchmark their yarn quality against that of
other mills, using objective measurements.

The famous USTER® Tester celebrates its 70th “The GGP® consisted of a capacitive sensor and a Evenness is still an essential quality standard for the
anniversary this year, and its unique reputation diagram recorder, all housed neatly in a industry today – although the number of different
as a driver of textile quality worldwide is state-of-the-art wooden case,” he says. “The device yarn parameters included in USTER® STATISTICS
stronger than ever. Even in its earliest version, actually looked quite similar to early radios – but it has extended over time, in line with the launch of for diameter variation, OI for dust and trash and FA
this remarkable instrument was a big hit with turned out to be a huge success story in the textile further USTER® instruments for quality for yarn fineness complete the extended test options.
spinning mills, inspiring a new focus on yarn industry over the coming decades." improvement. The USTER® Tester itself was
quality. Continuous development throughout developed still further and became even more Gabriela Peters, USTER’s Product Manager Yarn
the 20th Century saw the USTER® Tester popular, regarded as ‘the heart of the textile Testing, played a leading role in the creation of the
established as essential equipment for the laboratory’. latest USTER® TESTER 6, which was launched at
textile laboratory and the word ‘Uster’ become Best-selling tester ever ITMA in Milan in 2015. From its earlier role as an
a generic term among mill personnel for Another significant milestone in evenness testing essential laboratory tool, the USTER® Tester in its
evenness testing. USTER® GGP sixth generation now deserves to be called “the
came with the launch of USTER® TESTER 3 at the heart of the spinning mill,” she says.
Paris ITMA in 1987. Rathnam V. Rama, President of
Further progress followed in the new millennium, the Uster Technologies (India), joined the company the
USTER® TESTER 6 setting standards even higher year before: “The new third generation USTER® USTER® TESTER 6 incorporates the Total Testing
by introducing the Total Testing Center – the Tester won the product award at the show,” he says. Center, for centralized analysis of data from
gateway to integrated quality management of the “It was the most talked-about product during ITMA and connected USTER® testing and monitoring
complete yarn manufacturing process. For most drew huge crowds of customers to the USTER booth.” instruments. This allows total quality management
textile professionals, there is really only one of the entire spinning mill.
evenness tester, now fulfilling its destiny as the ITMA visitors were impressed by the product design
undisputed heart of the entire spinning mill. Here, and unique features of the USTER® TESTER 3, Says Peters: “We wanted a system going beyond
three USTER people describe some of the key which confirmed USTER’s position in the forefront of data collection. The new Tester must offer new
development stages. intelligent data analysis, including automatic
testing technology. The first hairiness measurement alarms for each process step. Users also have the
(H) was integrated in the instrument, enabling users
Peter Hättenschwiler was a 20-year old apprentice, to test evenness and hairiness at the same time. It benefit of built-in knowledge, provided through
working in the precision engineering department of was no surprise that several orders were booked on Assistant Q. This systematic approach drives timely
Zellweger Uster, a well-established and sizeable the spot at that show, for what subsequently problem-solving and makes a vital contribution to
Swiss company producing a range of textile testing Originating from the USTER company’s search for became the best-selling evenness tester of all time. avoiding quality complaints.”
instruments. The year was 1948 and Zellweger, the diversification after the 2nd World War, the GGP®
forerunner of Uster Technologies, was ready to was its first electronic product, incorporating the From yarn testing to total mill management These continuous outstanding developments
launch the world’s first yarn evenness tester, the USTER’s future-oriented vision and focus on underline the USTER® Tester’s status as a leading
USTER® GGP, after four years of development. latest technology of the day. It was soon established customer needs has ensured that the innovative global brand. USTER® TESTER 6 has also added
as the global standard for yarn evenness, destined aesthetic acclaim to its high-tech excellence by
Hättenschwiler, now in his 91st year, well to become an indispensable tool for many pace is continuous, reaching the summit of current winning a prestigious Red Dot Design Award
technology with the latest USTER® TESTER 6.
remembers assembling this historic instrument: generations of textile professionals. Starting with the brand-new digital Capacitive in 2016.

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