Leading Rotary Potentiometer Manufacturer

Changzhou Perpetual electronic technology co.,ltd is a leader in the design and manufacture of robust, reliable, and high quality industrial grade rotary potentiometers serving customers on a global basis.

Constructed with carbon composition, conductive plastic or wirewound elements, these potentiometers are capable of operating in environments with wide temperature ranges. Most models with rotational life up to 10000 cycles. Decades of experience and manufacturing excellence enables PERPETUAL to offer a choice product line of industrial rotary potentiometers and custom engineered solutions to meet customer requirements in Industrial, Transportation, and Medical markets.

Rotary potentiometer is a variable resistor which has the ability to regulate or change the flow of a current through a circuit. Rotary potentiometers can be controlled easily by turning a knob or spindle. They are available as either single or multiturn.

Types of Rotary Potentiometer

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What Is A Rotary Potentiometer?

A rotary potentiometer is an adjustable electrical resistor that can be moved by means of a rotary motion. This allows control processes to be implemented in various electrical or electronic systems, for example for volume control in multimedia devices.
It consists of a resistive element and a sliding element (wiper) that moves on the surface of the resistive element, and the resistance value can be freely varied by moving the sliding element.
Thus, potentiometers are a form of variable resistance, and in English-speaking countries, variable resistors are called potentiometers.

Introduction to Rotary Potentiometers

A rotary potentiometer is a commonly used type of electrical resistor. They are often used to control the volume of audio equipment, but can also be used to measure variables such as position and speed.

Potentiometers work by using a wiper that slides along a resistive element. This resistance creates a voltage difference between the two ends of the element, which can be measured. The amount of resistance depends on the position of the wiper, which can be controlled by rotating the knob.
Rotary potentiometers are available in a variety of sizes and with different types of resistive elements. The most common type is the carbon potentiometer, which uses a carbon track as the resistive element. Carbon potentiometers are inexpensive and have good linearity, but they are not suitable for high-precision applications.
 Metal film potentiometers use a thin film of metal deposited on an insulating substrate as the resistive element. These have better temperature stability and precision than carbon types, but they are more expensive. Cermet potentiometers use a ceramic material filled with metal particles as the resistive element. These have even better precision than metal film types, but they are even more expensive.

The main advantage of rotary potentiometers over other types is their low cost and simplicity. They can be used in a wide range of applications where precision is not critical.

What are Rotary Potentiometers Used For?

Rotary potentiometers are used in a wide variety of applications, from audio volume control to motor speed control. In audio applications, rotary potentiometers are used to control the volume of an amplifier or speaker. Motor speed control applications use rotary potentiometers to adjust the speed of a motor. Other common uses for rotary potentiometers include dimming lights and controlling the position of a joystick.

Rotary potentiometers can also be used for sensing position or rotation. This allows them to be used in robotics applications, where they are used to control the angle of a robotic arm or the speed of a wheeled robot. In this way, rotary potentiometers can be used as sensors for feedback control systems that require precise positional information.

In general, rotary potentiometers are used to measure or control an electrical signal by varying the total resistance of the circuit.

Advantages of Using a Rotary Potentiometer

There are many advantages of using a rotary potentiometer over other types of potentiometers, including:

Increased accuracy

Rotary potentiometers are more accurate than other types of potentiometers, making them ideal for applications where precision is key.

Increased durability

Rotary potentiometers are built to last, with many models able to withstand up to 1 million cycles without degradation in performance. This makes them ideal for industrial and commercial applications.


Rotary potentiometers can be used in a wide variety of applications, from audio volume control to motor speed control.

Easy to use

Rotary potentiometers are easy to install and use, making them a popular choice for both professional and DIY enthusiasts.

Low cost

Rotary potentiometers are relatively inexpensive, making them well suited for budget conscious projects.

Applications of Rotary Potentiometers

Rotary potentiometers have a wide range of applications in various industries, thanks to their versatility and ease of use. Some common applications include:
Volume Control: One of the most common uses of rotary potentiometers is in audio systems for controlling volume levels. Logarithmic taper potentiometers are typically used in this application, as they provide a more natural and gradual change in volume.
Lighting Control: Rotary potentiometers can also be used in lighting systems to control the intensity of light sources. By adjusting the resistance, the amount of current passing through the light source can be varied, resulting in different levels of brightness.
Motor Speed Control: In certain motor control applications, rotary potentiometers can be used to adjust the speed of the motor. By changing the resistance, the voltage across the motor can be controlled, which in turn adjusts the speed of the motor.
Industrial Equipment: Rotary potentiometers are often used in industrial equipment to provide precise control over various processes. Examples include controlling the speed of conveyor belts or adjusting the position of robotic arms.

Your Expert Potentiometer Supplier

Welcome To Visit Perpetual Electronic Factory

Changzhou perpetual electronic technology Co., LTD., founded in 2016, is a professional production of various types of potentiometer, encoder, export-oriented enterprises. Company since its inception, to establish "people-oriented" strategy to promote the development of enterprise, continuous innovation to improve enterprise competitiveness. The company has advanced automatic production equipment and well-equipped production team.

With the development trend of the international market, the company products have all reached the requirements of "ROSH" instruction. The varieties of more than 20 series, more than 100 specifications.

Cooperation Process

  • Step.1

    Send your inquiry
  • Step.2

    Quote price
  • Step.3

    Negotiate price and lead time
  • Step.4

    Sign the contract
  • Step.5

    Payment and production
  • Step.6

  • Step.7


Rotary Potentiometer FAQ

We have compiled the most frequently asked questions about our rotary potentiometers here for your convenience, but please feel free to contact us if you have any additional questions.
  • Q What is the main function of a potentiometer?

    A A potentiometer is a type of position sensor. The primary function of a potentiometer is to measure or monitor displacement. They can be used to measure either linear or rotary displacement and are available in different types depending on the application.
  • Q What is a potentiometer used for?

    A Potentiometers function as voltage dividers that can be used to both adjust voltage output to a circuit, and accurately measure (or meter) electric potential – hence the name potentiometer.
  • Q How can I get your samples?

    A Leave us a message along with your name and email so we can discuss what type of samples suit for your requirment/project.We will arrange the right samples according to your requirement.

Factory FAQ

  • Q How is your payment terms?

    A Send us your orders and will provide you the quotation.From there we can discuss the payment terms,our mainly payment terms is 30% in advance,balance before shipment.
  • Q Are you the manufacturer?



    Yes!Perpetual making over 100 varieties of products, specializing in the production of carbon potentiometer, wire wound potentiometer, rotary encoder,rotary band switch and so on.

  • Q What is Potentiometer?


    A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.[1] If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.

    The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name.

    Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. It is also used in speed control of fans. Potentiometers operated by a mechanism can be used as position transducers, for example, in a joystick. Potentiometers are rarely used to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be comparable to the power in the controlled load.

Contact Us To Discuss Your Unique Potentiometer & Encoder Needs

We are a professional production of various types of potentiometer, encoder, export-oriented enterprises.


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  Lijia Town,Wujin District, Changzhou City, Jiangsu Province, China