Since 1845, Gurley has
been a major designer and producer of measuring instrumentation for
a variety of industries and applications. Our areas of expertise
include optical encoders for the precise measurement of position or
speed; digital readout systems for retrofitting machine tools;
generation and replication of precise patterns on glass and similar
substrates; physical properties test instruments for medical tubing,
paper, films, textiles, and other sheet goods; mechanical
components; and open-channel flow meters to measure water velocity.
received ISO-9001 certification in January, 1996.
Encoders for both rotary and
linear motion, in conventional incremental and absolute configurations
and in GPI’s unique Virtual Absolute™ technology. They are
used to measure or control position and/or speed in medical
instrumentation, electronic manufacturing equipment, robotics, factory
automation, graphic arts and printing equipment, machine tools, radar
pedestals, and high speed scanners.
Our self-contained rotary incremental encoders are available in a
variety of sizes, from 0.75" dia with up to 40,960 counts/rev, to
a 6" dia model with 3,600,000 counts/rev. An industrial-grade
rotary absolute encoder offer resolution up to 217
words/rev. Modular rotary incremental encoders provide a wide choice
of size and resolution, while linear encoders come in many mounting
configurations, lengths, and accuracy grades. Virtual Absolute™
encoders are available as rotary or linear encoders in both
self-contained (housed) and modular configurations.
Gurley specializes in providing customized solutions to specific
problems, whether the answer is a low-cost encoder for high production
volumes or a very high performance encoder for military or aerospace
Optics and Optographics product line comprises the generation and
replication of precision optical patterns and parts such as reticles,
resolution targets, encoder discs and scales, prisms, mirrors, beam splitters,
filters, lenses and step wedges.
The patterns are most commonly vacuum deposited chrome on glass;
however, we also work with other pattern materials such as
silver, inconel, aluminum, and photographic emulsion. Other
substrates include plastic, fused silica (quartz), sapphire,
mylar film, zinc selenide, silicon, germanium, and zinc sulfide.
We have some catalog items,
but over 90% of our sales are items fabricated to meet customer's
drawings and specifications. The products are used in
fire-control systems, optical encoders, guidance systems, and
other types of optical, electro-optical, and laser based systems
operating in either the visible, infrared, or ultraviolet portion
of the spectrum.
Hydrological Instruments are used to measure flow velocity in open
channels such as rivers, streams, tidal marshes, sewers, flumes,
conduits, etc. The product line comprises two models of
bucket-wheel flow meters that cover the velocity range of 0.015
to 7 m/s. There are two readouts available: an earphone assembly
that is used to count clicks over a fixed period of time, and a
completely automatic hand held digital display.
GurleyTM Film, Sheet, and Paper Testing Instruments have been the industry standards for decades
for measuring physical characteristics such as stiffness,
flexibility, softness, porosity, air-permeability, and
smoothness. Gurley instruments are used extensively in the paper
manufacturing, paper board converting, printing, medical product
manufacturing, and textile/non-woven industries. While used most
often to test thin flat materials, small dimensional parts such a
tubing can also be tested.
To meet the needs of
measuring those characteristics over a wide range of parameters,
we offer three models of stiffness testers, seven densometers,
and a permeometer.
Historical SketchWritten by Bill Skerritt
The Gurley enterprise was
established in 1845, first as the partnership of Phelps &
Gurley and in 1852 as W. & L. E. Gurley. William
Gurley and his younger brother Lewis E. were both engineering
alumni of Rensselaer Polytechnic Institute, in Troy, NY, and
brought to the business a hunger for technical innovation and
unrivaled marketing skill. Exposure at the Centennial
Exposition in 1876 launched the company into international
prominence from which it never fell. The brothers
built a factory in 1852 that operated in departments, each
department turning out different components, which were then
assembled. This revolutionized the industry which, to
that time, operated as small shops making, essentially,
individual instruments. Gurley was able to roughly
halve the price of their instruments over those of their
competition, while maintaining quality.
Throughout the 19th century
Gurley continued to expand its product line and gradually moved
into others. In 1885 Gurley began making hydrologic
equipment, like current meters; in 1903 they opened a department
of Weights & Measures; in 1905 they acquired Charles Wilder
Thermometers and moved it to Troy; in 1908 they opened Department
P, making mechanical, electrical, and scientific apparatus; in
1923 they launched a line of paper testing equipment; and in the
1950s moved into applications of optical encoder technology.
Incorporated in 1900, Gurley
responded to the worldwide demand for their products by opening
the Seattle Factory Branch in 1909, to serve the Pacific Rim and
Asia. Gurley remained highly visible to the
engineering and surveying professions by supplying instruments to
major engineering projects and to expeditions, like Admiral
Byrd's. During World War II, Gurley distinguished
itself by winning coveted Army-Navy E Awards for outstanding
contribution to the war effort.
purchased W. & L. E. Gurley in 1968 and the company became
Teledyne Gurley. Production of surveying instruments
ceased in 1980 in the face of stiff foreign competition and the
technological shift away from optical instruments. In
1993 Teledyne sold Gurley and the company became Gurley Precision
Copyright © 1996-2014 Gurley Precision Instruments, Inc. All