The company, founded in 1946 by Joseph F. Keithley in a Cleveland, Ohio, workshop, designs, develops, manufactures and markets complex electronic instruments and systems geared to the specialized needs of electronics manufacturers for high-performance production testing, process monitoring, product development and research. Now part of Tektronix.
Keithley Instruments – Precision Instrumentation
2010 – Keithley Instruments joined Tektronix as part of its test and measurement portfolio.
- Instruments Relevant to Lab and Research
- Digital Multimeters and Data Acquisition/Switching Systems
- Low Voltage/Low Resistance Measurement Products
- Low Current/High Resistance Measurement Solutions
2182A Digital Nanovoltmeter
“A two-channel Nanovoltmeter for making stable, low noise voltage measurements and for characterizing low resistance materials and devices reliably and repeatably.”
Keithley Instruments Wiki
In September, 2010, the company agreed to sell itself to the Danaher Corporation, a Washington, D.C.-based conglomerate, for $21.60 per share. It was soon merged with Tektronix, Inc, which had been acquired by Danaher in 2007, and now exists wholly as a brand of Tektronix.
Keithley Instruments, Inc.
28775 Aurora Road Cleveland, Ohio 44139, USA.
Quality and Reliable test equipment for professionals for electrical maintenance and Testing. Used also in HVAC Work (Heating, Ventilating and Air Conditioning). Manufacturer of Testing, Monitoring, and Troubleshooting Tools.
Products include clamp-on ammeters, power quality analyzers, Multimeters and circuit tracers. Power Quality (PQ) equipment and Environment (Water, Air) Quality Instruments too.
Amprobe Test Tools and Instruments
“Professional analyzer for testing, maintenance, troubleshooting and efficiency of solar panels. The analyzer is used in the installation of solar panels to determine the proper inverter size, optimum power output position of panels and identifies broken or worn-out cells.”
SOLAR-500 Solar Analyzer – Amprobe
- I-V Curve test for solar cell
- Voltage at open circuit (Vopen)
- Current at short circuit (Ishort)
- I-V curve with cursor
- Calculation of panel efficiency (%)
History – Among the first products was the Clamp-on Inductive Ammeter, for which the company received its first patent in September 1950.
P. O. Box 9090
Everett, WA 98206, USA
QuadTech and Chroma ATE manufacture hipot testers, safety analyzers, LCR meters and milliohmeters.
QuadTech offers a number of solutions to meet the demands of medical device testing. From a single medical device safety tester (analyzer) to a complete medical device safety testing solution
QuadTech, Inc. founded as spinoff of GenRad’s Instrumentation Division – 1991.
(QuadTech now part of Chroma Systems Solutions – Updated March 2013).
QuadTech LCR Meters
The QuadTech 1715 LCR Digibridge is an economically priced, easily programmable, micro-processor based passive component tester for fast, precise impedance measurements.
It measures eleven different parameters with a basic accuracy of 0.2%. The 1715 provides four different test frequencies and two test voltages for testing flexibility.
For remote operation and automated system applications, the unit comes standard with an RS-232 interface, plus IEEE-488 and Handler interfaces are available as options.
QuadTech – Precision Test Equipment
25612, Commercentre Drive, Lake Forest, CA 92630-8813, USA.
One of the Manufacturers of Good Quality and Affordable Electrical Test Instruments from Japan. They have been manufacturing reliable test equipment for many decades. – delabs
Sanwa Electric Test Instruments
Digital Multimeter, Analog Multitester, Insulation Resistance Tester, Earth Tester, Laser Power Meter, Lux Meter, Thermo Meter, Tacho Meter, Phase Detector.
Sanwa Digital Volt Tester KP1(CAT.IV 600V)
IEC61010 CAT.IV 600V pocket size Digital Volt Meter, AC/DC auto-identifying voltage measurement, AC measurement in True RMS. EF (Electric Field) detection
1941 – Sanwa Denki Keiki Seisakusho established as a company manufacturing and selling diagnostic tools, or multi-testers (circuit testers) for use in equipment repair, following the increased popularity of radio receivers. (Koganei-machi, Kitatama-gun, Tokyo)
Sanwa Electric Instrument Co., Ltd.
Dempa Bldg., 4-4 Sotokanda 2-Chome, Chiyoda-ku, Tokyo 101-0021 Japan