Encoders

Precise position and motion detection
Versatile use in HMI and MMI systems
Robust design, long service life and precise signal processing

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Over 60 years of experience

in the electrical engineering and electronics industry

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Germany and Switzerland

Dual location strength and reliability

Encoders from Bourns

Contacting Encoders

Resolution Range	6. 16 PPR, 128 Position, 6. 9. 12. 24. 36 PPR, 6. 9. 12. 24 PPR, 8. 12 & 16 Position, 12 - 15 PPR, 9-24 PPR, 8 – 20 PPR, 9. 15 and 24 PPR, 9. 15. 20 PPR, 12. 18. 24 PPR, 12. 24 PPR
Rotational Speed	60-120 rpm max., 100 rpm
Circuit Compatibility	1-10 mA @ 10 VDC, 0,5-10 mA @ 5 VDC
Rotational Life	100 cycles @ 6 PPR /25.000 cycles @ 16 PPR, 50-200 shaft revolutions, 15-100 cycles

Wirewound product range

Optical Encoders

Terminal Configuration	5-Pin Axial or Radial/Cables with/without Connector
Resolution Range	8. 16. 32. 64, 25. 50. 64. 100. 125. 128. 200. 256
Rotational Speed	120-1000 rpm max., 300 rpm max. (ball bearing model: 3000 rpm max.)
Rotational Life	100 and 1.000.000 cycles, 10 million and 200 million shaft revolutions, 50.000 cycles

High Power Resistors product range

Rotary Encoders

Package Diameter	9-22 mm
Type	Incremental, Incremental w/Push Switch/Detent, Encoder w/High Detent Force, Low Profile Incremental w/Push Switch/Detent, SMT Incremental w/Push Switch, Incremental w/Plastic Shaft, Single LED Incremental w/Illuminated Shaft, Dual LED Incremental w/Illuminated Shaft and Switch Option, Triple LED Incremental w/Illuminated Shaft and Switch Option, Incremental / Shaftless, Incremental / Long Life, Optical w/Switch, Optical / High Resolution

Package Diameter

9-22 mm

Type

Incremental, Incremental w/Push Switch/Detent, Encoder w/High Detent Force, Low Profile Incremental w/Push Switch/Detent, SMT Incremental w/Push Switch, Incremental w/Plastic Shaft, Single LED Incremental w/Illuminated Shaft, Dual LED Incremental w/Illuminated Shaft and Switch Option, Triple LED Incremental w/Illuminated Shaft and Switch Option, Incremental / Shaftless, Incremental / Long Life, Optical w/Switch, Optical / High Resolution

Rotary Encoders product range

Magnetic Encoders

Resolution Range	1024 states, 64. 128. 256 and 512 PPR, 32. 64. 128 and 256 PPR
Rotational Life	100 million and 50 million shaft revolutions

Power product range

High-quality encoders for precise position and motion detection

Encoders are central components of modern automation technology and are standard equipment in many applications. As digital rotary encoders, they detect mechanical movements and convert them into electrical signals. Whether in industrial control, mechanical engineering, drive technology or user-guided HMI systems - encoders ensure precise detection of the angle of rotation, speed or position.

In contrast to classic potentiometers, encoders provide digital rather than analog output signals, which makes them particularly robust, fail-safe and flexible to use. They not only detect the direction of movement, but also the number of pulses that are generated when the encoder is turned. This allows even the smallest movements to be detected precisely - an important prerequisite for reliable processes and intuitive user guidance.

In cooperation with the manufacturer Bourns, Rotima AG offers a wide range of contacting, magnetic and optical encoders. Whether for precise menu navigation on devices, for speed control or for demanding tasks in industrial electronics - our encoder solutions meet the highest requirements in terms of quality, durability and signal stability.

Contacting encoders for temperature control

Encoder for machine control and speed detection

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Our range of encoders

Contacting Encoders

Series	Type	Package Diameter	Sealable	Detents	Switch	Shaft	Bushing	Terminal Configuration	Resolution Range	Rotational Speed	Circuit Compatibility	Rotational Life
3315	Incremental	9 mm	IP67	No	No	Plastic	Plastic/Metal	PC Pins	6, 16 PPR	120 rpm max.	TTL compatible	100,000 cycles @ 6 PPR /25,000 cycles @ 16 PPR
EAW	Absolute	22 mm	IP40	No	No	Plastic	Plastic	PC Pins	128 Position	120 rpm max.	10 mA @ 10 VDC	50,000 shaft revolutions
ECW	Incremental	22 mm	IP40	Yes	No	Plastic	Plastic	PC Pins	6, 9, 12, 24, 36 PPR	120 rpm max.	10 mA @ 10 VDC	200,000 shaft revolutions
EPS	Incremental	22 mm x 27 mm	IP40	Yes	Yes	Plastic	Plastic	PC Pins	6, 9, 12, 24, 36 PPR	120 rpm max.	10 mA @ 10 VDC	200,000 shaft revolutions
ES	Incremental/ Shaftless	20 mm	IP40	Yes	No	None	None	PC Pins	6. 9. 12, 24 PPR	120 rpm max.	10 mA @ 10 VDC	200,000 shaft revolutions
PAC18R	Absolute	18 mm	IP64	Yes	No	Plastic	Plastic	PC Pins	8, 12 & 16 Position	60 rpm max.	1 mA @ 10 VDC	30,000 cycles
PEC09	Incremental	9 mm	IP40	Yes	Yes	Metal	Metal	PC Pins	12 - 15 PPR	60 rpm max.	10 mA @ 5 VDC	30,000 cycles
PEC11D	Incremental	12 mm	IP40	Yes	Yes	Metal	Metal	PC Pins	15 PPR	60 rpm max.	10 mA @ 5 VDC	20,000 cycles
PEC11H	Incremental	11 mm	IP40	Yes	Yes	Metal	Metal	PC Pins	8 – 20 PPR	60 rpm max.	10 mA @ 5 VDC	100,000 cycles
PEC11J	Incremental	11 mm	IP40	Yes	Yes	Metal	Metal	SMD	9, 15 and 24 PPR	60 rpm max.	10 mA @ 5 VDC	100,000 cycles
PEC11L	Incremental	11 mm	IP40	Yes	Yes	Metal	Metal	PC Pins	9, 15, 20 PPR	60 rpm max.	10 mA @ 5 VDC	100,000 cycles
PEC11R	Incremental	12 mm	IP40	Yes	Yes	Metal	Metal	PC Pins	12, 18, 24 PPR	60 rpm max.	1 mA @ 5 VDC	30,000 cycles
PEC11S	Incremental	12 mm	IP40	Yes	Yes	Metal	Metal	SMD	15 PPR	60 rpm max.	1 mA @ 5 VDC	15,000 cycles
PEC12R	Incremental	12 mm	IP40	Yes	Yes	Plastic	Metal	PC Pins	12, 24 PPR	100 rpm max.	1 mA @ 5 VDC	30,000 cycles
PEC16	Incremental	16 mm	IP40	Yes	Yes	Plastic	Metal	PC Pins	12, 24 PPR	100 rpm max.	1 mA @ 5 VDC	100,000 cycles
PEL12D	Incremental	12 mm	IP40	Yes	Yes	Plastic	Metal	PC Pins	24 PPR	100 rpm	0.5 mA @ 5 VDC	30,000 cycles
PEL12S	Incremental	12 mm	IP40	Yes	No	Plastic	Metal	PC Pins	24 PPR	100 rpm	0.5 mA @ 5 VDC	30,000 cycles
PEL12T	Incremental	12 mm	IP40	Yes	Yes	Plastic	Metal	PC Pins	12, 24 PPR	100 rpm	0.5 mA @ 5 VDC	30,000 cycles
PER21	Incremental	21 mm		Yes	No	None	None	PC Pins	9 PPR	60 rpm max.	10 mA @ 5 VDC	50,000 cycles
PER23	Incremental	23 mm		Yes	No	None	None	PC Pins	10 PPR	60 rpm max.	10 mA @ 5 VDC	50,000 cycles
PER28	Incremental	28 mm	IP40	Yes	No	None	None	PC Pins	15 PPR	60 rpm max.	10 mA @ 5 VDC	50,000 cycles
PER35	Incremental	35 mm	IP40	Yes	No	None	None	PC Pins	10 PPR	60 rpm max.	10 mA @ 5 VDC	50,000 cycles
PER56	Incremental	56 mm	IP40	Yes	No	None	None	PC Pins	15 PPR	60 rpm max.	10 mA @ 5 VDC	50,000 cycles
PER60	Incremental	60 mm		Yes	No	None	None	PC Pins	15 PPR	60 rpm max.	10 mA @ 5 VDC	40,000 cycles
PES12	Incremental/Shaftless	12 mm	IP40	Yes	No	None	None	PC Pins	24 PPR	60 rpm max.	1 mA @ 5 VDC	30,000 cycles

Magnetic Encoders

Series	Type	Package Diameter	Sealable	Detents	Switch	Shaft	Bushing	Terminal Configuration	Resolution Range	Rotational Speed	Circuit Compatibility	Rotational Life
EMS22A	Non-Contacting Absolute Encoder	21 mm x 16 mm	IP65	No	No	Metal	Metal	Axial, Radial or Ribbon Cable	1024 states	Up to 10,000 rpm	TTL, CMOS	100 million and 50 million shaft revolutions
EMS22D	Non-Contacting Direction/Step Encoder	21 mm x 16 mm	IP65	No	No	Metal	Metal	Axial, Radial or Ribbon Cable	64, 128, 256 and 512 PPR	Up to 10,000 rpm		100 million and 50 million shaft revolutions
EMS22P	Non-Contacting PWM Encoder	21 mm x 16 mm	IP65	No	No	Metal	Metal	Axial, Radial or Ribbon Cable	1024 states	Up to 10,000 RPM		100 million and 50 million shaft revolutions
EMS22Q	Non-Contacting Incremental Encoder	21 mm x 16 mm	IP65	No	No	Metal	Metal	Axial, Radial or Ribbon Cable	32, 64, 128 and 256 PPR	Up to 10,000 rpm		100 million and 50 million shaft revolutions

Optical Encoders

Series	Type	Package Diameter	Sealable	Detents	Switch	Shaft	Bushing	Terminal Configuration	Resolution Range	Rotational Speed	Circuit Compatibility	Rotational Life
EM14	Incremental	14 mm	IP54	Yes	Yes	Metal	Metal	5-Pin Axial or Radial/Cables with/without Connector	8, 16, 32, 64	120 rpm max.	TTL, CMOS, HCMOS compatible	100,000 and 1,000,000 cycles
EN	Optical/Incremental	21 mm x 16 mm	IP40	No	No	Metal	Metal	5-Pin Axial or Radial/Cables with/without Connector	25, 50, 64, 100, 125, 128, 200, 256	300 rpm max. (ball bearing model: 3000 rpm max.)	TTL, CMOS	10 million and 200 million shaft revolutions
ES14	Incremental Quadrature	14 mm	IP54	No	No	Metal	Metal	5-Pin Axial or Radial/Cables with/without Connector	8, 16, 32, 64	1000 rpm max.	TTL, CMOS, HCMOS compatible	50,000,000 cycles

Rotary Encoders

Series	Package Diameter	Type
3315	9 mm	Incremental
PEC09	9 mm	Incremental w/Push Switch/Detent
PEC11H	11 mm	Encoder w/High Detent Force
PEC11R	12 mm	Incremental w/Push Switch/Detent
PEC11L	11 mm	Low Profile Incremental w/Push Switch/Detent
PEC11S	12 mm	SMT Incremental w/Push Switch
PEC12R	12 mm	Incremental w/Plastic Shaft
PEL12S	12 mm	Single LED Incremental w/Illuminated Shaft
PEL12D	12 mm	Dual LED Incremental w/Illuminated Shaft and Switch Option
PEL12T	12 mm	Triple LED Incremental w/Illuminated Shaft and Switch Option
PES12	12 mm	Incremental / Shaftless
PEC16	16 mm	Incremental / Long Life
EM14	14 mm	Optical w/Switch
EN	22 mm	Optical / High Resolution
ES14	14 mm	Optical / High Resolution

Technical features of encoders explained

Encoders typically consist of a rotating shaft, a sensor element and an electronic evaluation unit. Depending on the technology: contacting, magnetic or optical, the rotary movement is detected via mechanical contacts, magnetic fields or light signals. As the shaft rotates, the encoder generates defined pulses that are transmitted to the control system as digital signals. These signals provide information about the direction of rotation, speed or position. In the electronics industry, encoders are used for precise control and operation, for example in motor controls, HMI devices or for navigation in menu structures. They are robust, durable and ideal for demanding industrial environments.

Encoders detect rotary movements, positions and speeds with high accuracy. In industry, they are essential for control systems, drives and automation. Compared to analog potentiometers, encoders deliver digital signals that can be processed more reliably and without interference. They enable the seamless recording of mechanical movements in real time - ideal for modern production environments.

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Encoder measurement technology for industrial control and drive systems

Encoders are used wherever movements or positions need to be digitally recorded and processed. In industrial applications, for example, they are used to control the speed and position of electric motors or drives. In modern control panels, they record rotary movements for menu navigation, for setting parameters or for precise control of temperature, volume or brightness.

In automation technology, encoders provide reliable feedback on the status of moving components - for example in linear axes, conveyor belts or CNC machines. They are also indispensable in pro audio technology, where they ensure precise control of mixing consoles, effects units or amplifiers. Thanks to their robust design and digital signal processing, encoders are ideal for demanding environments.

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Further information about Encoder

Encoders are central components in modern electronics and industrial automation. Their precise detection of rotary movements and positions enables efficient control and regulation in a wide range of applications. In this FAQ section, frequently asked questions about the design, function and possible applications of encoders are answered in a comprehensible and technically sound manner. ROTIMA AG is at your side as a reliable distributor with high-quality products from renowned manufacturers such as Bourns.

What are encoders and how do they work?

Encoder are digital rotary encoders that convert mechanical movements - usually rotary movements - into digital signals. These signals are then evaluated by controllers or microcontrollers in order to detect the position, speed or direction of rotation of a moving element. The mechanical structure ...

Why are encoders used in industry?

Encoder are indispensable components in modern industrial automation. They enable the precise and reliable detection of positions, speeds and directions of movement in real time. Thanks to their digital signal processing, encoders provide stable, repeatable data, which is essential for the precise ...

What types of encoder are there and how do they differ?

Encoder can basically be divided into three main categories: contacting, magnetic and optical encoders. Contacting encoders work with mechanical sliding contacts that generate pulses - they are suitable for simple applications with low loads. Magnetic encoders use magnetic fields for signaling and ...

How are encoders used in HMI and MMI systems?

In human-machine interfaces (HMI) and machine-machine interfaces (MMI) ,encoders perform the important task of digital input and feedback. In HMI systems - i.e. human-machine interfaces - encoders record manual rotary movements, for example for menu navigation, parameter adjustment or volume contro...

What are the advantages of encoders over potentiometers?

Encoder differ fundamentally from potentiometers, even though both are used to detect rotary motion. While Potentiometer generate analog voltage values depending on the angle of rotation, encoders deliver digital pulses. This has decisive advantages: Encoders are significantly less prone to wear, a...