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Simpson Electric is a prominent manufacturer in the panel and test instrument industries. The company was founded in 1934 and is known for a history of “firsts” and Made-in-USA quality.
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Handheld Multimeter

Handheld Multimeter (16)

Handheld Multimeters are portable, battery powered multimeters for measuring Voltage, Current, Resistance, and more


Milli-Ohmmeter (1)

Milli-Ohmmeters measure low resistance at high accuracy, confirming the value and integrity of any electrical circuit and connection

Panel Meters

Panel Meters (9959)

Panel meters display input signals from sensors measuring voltage, amperage, pressure, flow, and other variables

Current Sensors

Current Sensors (45)

Current Sensors measure the magnetic field around an AC or DC current carrying conductor/wire and generate a proportional signal for use by a wide variety of instruments

Sound Level Meters

Sound Level Meters (4)

Sound Level Meters measure sound pressure, vibration levels, and/or frequencies

Leakage Current Testers

Leakage Current Testers (2)

Leakage Current Testers look for current that flows across the insulation.

Current Clamp Adaptors / Current Clamps

Current Clamp Adaptors / Current Clamps (2)

Current Clamp Adaptors convert measured current signals into a voltage signal suitable for multimeters, oscilloscopes, data recorders and more


Accessories (101)

Extend the capabilities of your instrument or get genuine Accessories that fit your test equipment


Clearance (9)

New and Open Box Clearance items

Discontinued Products

Discontinued Products (1)

Discontinued Products Gone but Never forgotten.

Megohmmeter / Insulation Resistance Testers

Megohmmeter / Insulation Resistance Testers (3)

Megohmmeters, or Insulation Resistance (IR) Testers, are used to measure the resistance, integrity and safety of electrical wiring insulation

Reliability / Preventative Maint / Rotational

Reliability / Preventative Maint / Rotational (7)

Test instruments for Reliability Centered Maintenance (RCM) and Preventative Maintenance (PM) programs, such as for Rotating Equipment

Simpson 260 vs 270 Analog Multimeters

Simpson 260 vs 270 Analog Multimeters (4)

Comparison of the Simpson 260 vs 270 Series Analog Multimeters

Above: The Simpson 260, the original multimeter

Simpson Electric was founded in 1934 by Ray Simpson. Simpson broke into the electrical industry with impressive success: in 1927, before even founding his company, he manufactured the compass Charles Lindbergh used during his first solo flight across the Atlantic. Considering the amount of trust placed in the equipment, this was an incredible honor. From this point on, Simpson has maintained a successful drive for innovation up until today. The company is responsible for many firsts in the electrical industry that we take for granted today. Chief among these innovations is the Simpson 260 volt-ohm-milliammeter. This early version of the modern multimeter was actively used throughout World War II, and effectively made Simpson a household name in the industry. Simpson was also instrumental in the “space race” of the 1960s. The company was contracted by NASA to manufacture 14 variations of a specialized "NASA meter" for multiple aspects of the Apollo Program. These meters were actively used inside spacecraft, on the ground for support, and by aerospace contractors throughout the industry.

Today, Simpson is a full-fledged panel meter and contract manufacturing company with business worldwide. Specifically, the company specializes in producing analog & digital meters and test equipment, circuit boards, cables, leads, and shunts. Simpson also currently maintains facilities capable of performing sand blasting, screen printing, punch pressing, tapping, injection molding, compression molding, and wave soldering. Current major clients include NASA, Schlumberger Oil, all branches of the US military, Grainger, and McMaster Carr. Simpson is owned today by the Lac du Flambeau Band of Lake Superior Chippewa Indians. The company is based in northern Wisconsin. It is still known today for the high-quality reputation that has always accompanied all its panel and test instruments.
To view Simpson's entire current catalog, please click the image below or this link.



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