Jaquet Speed Sensors
A History of Accurate Speed Measurement
19 February, 2023 by
Jaquet Speed Sensors
Juha Rutanen
When it comes to measuring speed in industrial and automotive applications, Jaquet Speed Sensors are a name that stands out. Since its establishment in 1907, Jaquet Technology Group has been at the forefront of developing high-quality sensors for various industries, including aviation, automotive, and rail.

Jaquet Speed Sensors are designed to accurately measure the speed of a moving object or system. These sensors are utilized in numerous applications, including motorsports, aerospace, marine, and industrial machinery.

This article will delve into the history of Jaquet Speed Sensors, the technology behind their functioning, and their application in modern times.

The History of Jaquet Speed Sensors

Jaquet Technology Group was founded in Switzerland by Emile Jaquet in 1907. At the time, the company focused on manufacturing watch movements. However, in the 1920s, it started developing speed sensors for cars and aircraft.

The first Jaquet speed sensor was created in 1925, which was designed for use in aviation. The device had a metal disc with an aperture in it that rotated with the propeller. The disc would interrupt a light beam that was aimed at a photocell, creating an electrical signal. This signal was used to measure the RPM of the engine and propeller.

Over the years, Jaquet continued to develop its speed sensors for various applications, including racing cars, helicopters, and even missiles. The company also expanded its product range to include tachometers, hour meters, and other measuring devices.

In the 1980s, Jaquet began to develop electronic sensors, which were more accurate and reliable than their mechanical counterparts. These new sensors utilized Hall Effect technology, which measures the voltage produced by a magnetic field as it passes through a conductive material.

Jaquet continued to innovate and improve its products, becoming a leading supplier of speed sensors to numerous industries.

How Jaquet Speed Sensors Work

Jaquet Speed Sensors are designed to measure the speed of a moving object by detecting its rotation. The sensors use a variety of technologies to achieve this, including magnetic, optical, and inductive sensing.

Magnetic sensors utilize the Hall Effect to detect the presence of a magnetic field. The sensor contains a small piece of semiconductor material, which produces a voltage proportional to the strength of the magnetic field passing through it. When a magnet is attached to a moving object, the sensor can detect its rotation and produce an electrical signal that corresponds to the speed of the object.

Optical sensors work by interrupting a light beam that is aimed at a photosensitive element. As the object moves, it blocks the beam, creating a series of pulses that correspond to its speed. These pulses are then counted by an electronic circuit to determine the object's speed.

Inductive sensors use a coil of wire to detect changes in magnetic fields. As a metal object moves past the sensor, it creates a disturbance in the magnetic field, which is detected by the coil. This disturbance generates an electrical signal that corresponds to the speed of the object.

Applications of Jaquet Speed Sensors

Jaquet Speed Sensors have numerous applications across various industries. In the automotive industry, they are used to measure the speed of engines, transmissions, and wheels. In the aerospace industry, they are utilized to measure the RPM of aircraft engines, helicopter rotors, and other moving parts. They are also used in marine and rail applications, including propellers, pumps, and conveyors.

One of the most significant applications of Jaquet Speed Sensors is in motorsports. These sensors are used to measure the speed of race cars, including the RPM of the engine and the speed of the wheels. This information is crucial for optimizing performance and ensuring the safety of the driver and the vehicle.

Jaquet Speed Sensors are also utilized in industrial machinery
where they are used to measure the speed of conveyor belts, motors, and other moving parts. These sensors help ensure that machinery is running at the correct speed and can detect any deviations or malfunctions that could lead to damage or downtime.

In addition to their primary function of speed measurement, Jaquet Speed Sensors can also provide additional data, such as temperature and vibration, which can be used to monitor the health of machinery and predict potential issues before they occur.

The Future of Jaquet Speed Sensors

As technology continues to advance, the applications for Jaquet Speed Sensors are likely to expand. With the rise of the Internet of Things (IoT), sensors are becoming increasingly interconnected, providing more extensive data and enabling predictive maintenance and real-time monitoring.

Jaquet Technology Group has continued to innovate and improve its products to keep up with these technological advancements. The company's current product range includes electronic and mechanical sensors, as well as custom-designed solutions for specific applications.


Jaquet Speed Sensors have a rich history in the field of speed measurement, dating back to the 1920s. From their origins in aviation, these sensors have found applications in numerous industries, including automotive, marine, rail, and motorsports.

The accuracy and reliability of Jaquet Speed Sensors have made them a trusted choice for speed measurement in industrial and automotive applications. With advancements in technology, these sensors are likely to become even more crucial for optimizing performance, predicting potential issues, and ensuring the safety of people and machinery.

As the world continues to demand greater efficiency and productivity, Jaquet Speed Sensors are likely to play an essential role in meeting these needs, providing accurate and reliable data for critical systems and processes.

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