3, 5 or 10 turn potentiometers or on request with up to 30 turns. Multiturn potentiometers are available in two resistive elements.
Guide for Multiturn Potentiometers
Our multiturn potentiometers cover angles up to 10800° (30 turns) and open up applications with measuring ranges ≥360°. They are available in wire-wound and up to 10 turns also in hybrid technology, the latter with excellent signal smoothness, longer lifespan and almost infinite resolution. Redundant or galvanically isolated multiturn potentiometers are available in tandem or multigang versions.
The larger the angle of rotation or the number of mechanical revolutions, the greater is the setting accuracy. Typically this kind of potentiometers is used in 3-, 5- and 10-turn versions, but there are also applications with a requirement for very large angular ranges, where 20- or even 30-turn versions are used. In addition, limit switches can be integrated, which can be configured at the factory within the electrically effective angle of rotation or signal plateau.
MEGATRON is your partner for the optimal product adjustment to your application. We are entitled to provide each customer individually with the best functional and economical result. With high delivery reliability and assured quality products, we focus on long-term partnerships and accompany you throughout the entire lifespan of your application.
In the case of a multiturn potentiometer, it is mainly the number of full turns, which is measured in angular degrees. A 10-turn potentiometer therefore has a measuring range of 10 x 360° = 3600°. Some multiturn potentiometers can be realized with up to 30 turns / 10800° (series 46 / 46HDS ). This is because the higher the angle of rotation of the potentiometer, the more precise the setting accuracy can be achieved. They are suitable as precise setpoint and actual value transmitters for which a precise angle measurement with analogue output signal is to be realized.
A typical application is the measurement of linear travels, which are converted into a rotary motion via a spindle drive. Here, the multi-turn potentiometer provides exact feedback of the various axis positions, for example, used in the memory function of "first class" aircraft seats or generally in drive technology.
Note: Please do not confuse "multiturn" with "multiganged". Multiganged means that several potentiometers are "connected" in series to form a system via the potentiometer shaft. They are used for applications that require, for example, redundant connections and/or electrically isolated signals.
As with all potentiometers, a resistance track, a slider and connections are required. The slider picks up a voltage potential on the resistor track via the rotary movement and direction of rotation. The main difference between a multiturn potentiometer and a single-turn potentiometer (<360°) is the design and shape of the resistor track. The resistor track of multiturn potentiometers is spiral-shaped and allows the detection of angles ≥360°.
One turn is one full rotation of the shaft with 360° and corresponds to one turn of the spindle-shaped resistance track. Several turns mean more possible rotations, higher angular degree and necessary space for the number of turns. Thus, the longer housing can be explained for 5 to 10 turns or even more with up to 30 turns.
In order to prevent the slider from going beyond the ends of the spiral-shaped resistance path during a rotation, mechanical stops must be provided for the slider in both directions. To protect these stops from mechanical overload, integrated slip clutches are optionally used.
Multiturn Inner Design (wirewound)
Hybrid Resisitve Element
Both resistance elements fulfil the task of detecting angles ≥360°. However, wire-wound elements can cover much larger angles than hybrid elements. The last ones are only available up to 10-turn (3600°), whereas wire-wound multiturn potentiometers can be ordered with up to 30-turn and thus 10800°. The resistive elements also differ in their basic sensory properties:
The characteristics of potentiometers with a wire-wound resistor element can be found here. Their main characteristics are very narrow resistance tolerances and the ability to withstand higher electrical loads and low-frequency vibrations.
The resistive path of hybrid potentiometers is technologically best compared to the characteristics of conductive plastic potentiometers. Hybrid potentiometers are basically multiturn potentiometers in which the spiral resistor track is covered with conductive plastic. Hybrid technology is therefore also characterized by almost infinite resolution, a very smooth output signal, high operating speed and long lifespan, as is the case with single-turn conductive plastic potentiometers.
Limit switches are available on some models that trigger a switching operation when a certain electrically effective angle of rotation is reached. The limit switches are factory configurable within the electrically effective angle of rotation or signal plateau. Lifespan and maximum load are not the same for these switches as for the potentiometers themselves.
AL17/19 meets 360° - multiturn potentiometer
A single-turn potentiometer with a linear signal curve is hardly capable of meeting a measuring range of exactly 360°. Therefore, multiturn potentiometers are used for this task. If the application allows it, we recommend using a 3-turn potentiometer. In addition, on request we have so-called 1-turn multiturn potentiometers from the AL17/19 series in our range, which meet the requirement for 360°. Furthermore, our sine/cosine potentiometers meet the requirement for 360°. However, they differ fundamentally from the multiturn potentiometers described here in terms of design and electrical characteristics.
Frequently requested product adaptations include special resistance values, through-/rear shaft, center taps, tighter linearity tolerances, adjustments to the shaft geometry as well as adjustments to the bushing or servo flange or the assembly of cables or connectors. Feel free to contact us for any support needed.
Robust multiturn potentiometer for increased radial shaft loads in Ø22 mm housing
Potentiometer with up to 30 turns and power rating up to 10 W in Ø46 mm housing
Potentiometer with up to 20 turns in Ø25 mm housing with outstanding linearity and resolution
Economical and high precision multiturn potentiometer in Ø22 mm servo flange housing
Very compact multiturn wirewound potentiometer in Ø13 mm servo flange housing
Robust and precise multiturn potentiometer in seamless moulded Ø20 mm housing
Precise multiturn wirewound potentiometer in Ø20 mm servo flange housing and 2 x ball bearings
Servo flange potentiometer with up to 20 turns and power rating up to 10 W in Ø46 mm housing
Robust and precise multiturn potentiometer in seamless moulded Ø20 mm housing without centring collar
Miniaturized and precise multiturn potentiometer in Ø13 mm housing optionally for PCB mounting
Potentiometers with outstanding linearity and resolution for measuring ranges from 3 to 20 revolutions in Ø25 mm servo flange housing
Smallest hybrid multiturn potentiometer in the world thanks to Ø13 mm housing. Long lifespan and very accurate.
Economical, high-resolution and long-lasting multiturn potentiometer with very low signal noise in Ø22 mm housing
High-resolution and long-lasting multi-turn potentiometer with very low signal noise in Ø20 mm housing
High-resolution and long-lasting potentiometer in 22 mm housing, optimized for radial shaft load
High-resolution and long-lasting multiturn potentiometer with very low signal noise in 22 mm servo flange housing
Smallest hybrid potentiometer of the world in Ø13 mm housing with long lifespan and low signal noise
High-resolution and long-lasting multi-turn potentiometer with very low signal noise in Ø20 mm servo flange housing
Oil-filled and multigangable wirewound potentiometer in Ø62 mm housing with optional limit switch, rear shaft and mech. stop
- Robust and precise miniature sensor
- Seamless moulded housing with 2 x sleeve bearings provides additional stability
- Without centering collar with metric shaft geometry
- Technical counterpart series AC (with centering collar and inch-dimensional shaft)
- Optional IP65 protection by sealing ring
- On request with limit switch and slipping clutch