Guide for Multiganged Potentiometers
The failure of a single, non-redundant sensor signal can lead to machine downtime and even hazardous situations. Redundant systems can detect a faulty sensor signal by comparing the signals. If there is a discrepancy, it often has a mechanical or electrical cause. In most cases it is a cable break and not a sensor fault. We therefore recommend the use of separate, high quality cable harnesses or wiring.
Redundant systems are used when it is advantageous to the application or when required by regulations. They are most commonly used to achieve the following objectives:
Increase machine availability or reduce downtime
The probability of all sensor signals failing at the same time is significantly reduced in redundant systems. By increasing the number of "gangs", the probability of failure can be minimized. In the event of a failure, it is not always necessary to shut down a system immediately. This ensures that, despite the disturbed signal, no major damage to property or even personal injury is caused.
Overall increase in operational safety
Due to the critical nature of the application, the machine is immediately shut down in the event of a fault. Redundancy allows for controlled shutdown. Examples of this can be found in vehicles and moving machines, e.g. when used in joysticks and control levers.
The potentiometers are arranged in a row on a shaft. The resistors are not far apart. This means that the heat generated by the dissipation of each unit has an effect on the temperature of the neighbouring units. The maximum permissible nominal load of each resistive element or individual potentiometer segment is reduced as shown in the diagram.
These specifications are at ambient temperature. If the potentiometers are to be used at higher temperatures, the rated power must be reduced.
*This graph does not apply to the oil-filled potentiometers
In principle, the same product adaptations are available for the tandem versions as for the non-tandem versions: Special resistances, rear shafts, centre taps, linearity tolerances and shaft geometry adaptations, as well as bushing and servo flange versions. It is also possible to equip tandem potentiometers with different resistances or linearity tolerances for each sub-unit. However, these multi-turn potentiometers are used in rare special applications where the signal conditioning electronics require it.
Please note that tandem versions are not available for all series. For example, axial pins prevent the mounting of a second sensor segment. Please contact us if you have any questions regarding feasibility and special product adaptations. We will be happy to advise you.
Economical and compact precision potentiometer in Ø22 mm housing with long lifespan and many options
The most compact high-resolution potentiometer with the highest lifespan - in this combination in our portfolio in Ø22 mm housing
High-resolution precision potentiometer with servo flange, good linearity and excellent lifespan in Ø27 mm metal housing
High-resolution precision potentiometer with servo flange, excellent linearity and lifespan and high resistance value in Ø36.5 mm metal housing
High resolution precision potentiometer with excellent linearity and lifespan, very high resistance value and high electrically effective rotation angle in Ø51 mm housing
Compact precision potentiometer with good accuracy and high electrically effective angle of rotation in Ø22 mm housing
Compact, economical and universal potentiometer in Ø22 mm housing with very low installation depth
Wirewound potentiometer with high electrically effective angle of rotation in Ø22 mm servo flange housing
Wirewound potentiometer with high electrically effective angle of rotation in Ø27 mm servo flange housing
Precise wirewound potentiometer with high angular resolution in Ø41 mm servo flange housing and many options
Very accurate wirewound potentiometer with high angular resolution in Ø50 mm servo flange housing and many options
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
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
Potentiometers with outstanding linearity and resolution for measuring ranges from 3 to 20 revolutions in Ø25 mm servo flange housing
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 multiturn potentiometer with very low signal noise in 22 mm servo flange housing
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
Oil-filled potentiometer in Ø62 mm housing with IP65, increased torque and high power rating (5W)
- Highest lifetime
- Achieves the highest linearity requirements with up to ±0.05%
- Extremely precise sensor
- High electrically effective angle of rotation 350° ±5°
- Servo flange for precise mounting
- 2 precision ball bearings in robust metal housing
- Applicable in wide temperature range
- Very high max. resistance value - power saving in applications
- 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
Multigang potentiometers are used in safety-critical applications where redundant connections and/or galvanically isolated signals are required. Several potentiometers are connected in a row as segments on one shaft. Tandem versions (2 units) are most commonly used. For very high safety requirements, up to 10 units in a row (10-turn potentiometers) can be implemented as single-turn or multi-turn versions.
The ability to select a specific resistance value, resistance tolerance or linearity for each gang makes multi-gang potentiometers complex and multi-functional components. In addition, depending on the type of potentiometer, all other options such as rear shaft, shaft adaptations, centre tap and limit switches are available.
MEGATRON is your specialist for the optimum technological product integration into your application. With quality products and high delivery reliability, we support you throughout the entire life cycle of your application. Our aim is to provide each customer with the best product for their application.