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Rotary Encoder Overview

A rotary encoder is a typical detector that converts mechanical rotational displacement (analog quantity) into electrical pulses (digital quantity). It is used in a wide range of applications in many fields, including measuring the position, angle, and speed of mechanical devices, and controlling the rotational speed and amount of rotation of motors.

We offer a wide range of rotary encoders to suit various applications, from general industrial use to special applications such as explosion-proof and heat-resistant types, as well as compact models that save space. We also offer roller encoders, an application of rotary encoders, for measuring distance and speed on conveyor belts and other systems.

Rotary encoder

General industrial use

  General-purpose Pressure-resistant explosion-proof type
  RP-1710 Series RP-1730 Series RP-2700 Series
  Robust installation type Robust flange type Robust installation type
  rp1710 rp1730 rp2700
Features Excellent impact resistance and axial load resistance
High resolution, multiple pulse counts (61 types in total, up to 120,000 P/R)
Selectable line driver output suitable for long-distance transmission is available.
The power supply can be selected from AC or DC.
Connection methods include the option of terminal blocks or connectors.
By attaching an oil seal to the rotating shaft as specified and selecting a terminal block as the connection method, the device conforms to protection class IP65.
Complies with CE marking and offers improved noise immunity.		 Explosion-proof type that satisfies explosion class d2G4 (Certification number T68417)
Even if explosive gas enters the interior and ignites and explodes, the enclosure is designed to withstand the explosion pressure and prevent ignition of surrounding explosive gases.
The power supply can be selected from AC or DC.
A cable gland is used at the power line entry point.
It can replace some parts of the RP-210 series.
Number of output pulses 60, 100, 120, 180, 200, 240, 250, 256, 300, 360, 400, 480, 500, 512, 600, 720, 750, 800, 900, 960, 1000, 1024, 1200, 1250, 1280, 1440, 1500, 1600, 1800, 2000, 2048, 2400, 2500, 2560, 2880, 3000, 3600, 3750, 4000, 4096, 4500, 4800, 5000, 5120, 6000, 7500, 9000, 12000, 15000, 18000, 22500, 24000, 30000, 36000, 45000, 48000, 60000, 72000, 90000, 96000, 120000 P/R 60, 100, 300, 360, 500, 600, 1000, 1500, 3000 P/R
Maximum rotational speed 5000 r/min 8000 r/min
Allowable shaft load 80 N (Radial)
50 N (thrust)		 150 N (radial)
100 N (thrust)
Shaft diameter Φ 15 mm Φ 19 mm
Starting Torque 15 mN･m 50 mN・m
Weight 3.7 kg 15.5 kg
Protection class IP65 IP50
Power supply AC 100V～240V/
DC 12V to 24V		 AC 100-240 V
DC 12-24V

Low torque, small size

  Ultra small General-purpose
  SP-405ZA RP-432Z
  sp405za rp432z
Features Economy type designed to meet OEM needs.
Ultra-compact and lightweight with an outer diameter of Φ38 and a weight of 100 g.
Protection class IP 40
Outputs a two-phase square wave plus a zero mark signal.
(Maximum resolution of 900 P/R with optional specifications)
13 types of output pulse counts		 Economy type designed to meet OEM needs.
A general-purpose machine that can be used for a wide range of applications.
The device can operate on either DC 5V or DC 12V power.
The output signal connection uses an easy-to-use connector system.
Outputs a two-phase square wave plus a zero mark signal.
Five different output pulse counts (Note: 60, 300, and 500 P/R models are no longer available).
Number of output pulses 60, 100, 200, 300, 360, 500, 600 P/R
(Options: 40, 50, 250, 400, 800, 900 P/R)		 120, 360, 600, 1000, 1024 P/R
Maximum rotational speed 6000 r/min 5000 r/min
Allowable shaft load 25 N (Radial)
15 N (thrust)		 20 N (Radial)
10 N (thrust)
Shaft diameter Φ 4 mm Φ 6 mm
Starting Torque 2 mN・m 1.5 mN・m
Weight 0.1 kg 0.25 kg
Protection class IP 40 -
Power supply DC 5 to 12V DC 5 or 12V

Roller encoder

A roller encoder allows for easy measurement of the line speed and length of a moving object.

Length meter

  • When used in combination with the TM-4300 series reversible counter, it can be used for measuring length.

Measurement of length

It can measure the length of rails and highways in 1 mm increments.

Line speedometer

  • The speed display is directly readable, eliminating the need for complicated calculations.

  • 0 m/min: Can be detected from very close range.

Measurement of rotational speed difference/ratio

It can measure the elongation rate and reduction ratio of steel plates.

Line speed meter / length measuring instrument

  Standard model (RoHS and CE compliant)
  RP-7400
  rp7400
measurement speed Measurement
Outer circumference of the roller 200 mm (Φ63.66)
Roller material Al + Urethane rubber coating (rubber hardness A90)
Output pulse 120, 1200 P/R (speed) 200 P/R (length measurement)
Power supply DC 12V ±5% (100 mA or less)
Speed range 0 to 600 m/min
Unit of measurement 0.01 m/min: 1200 P/R
0.1 m/min: 120 P/R		 1 mm: 200 P/R
Allowable radial load 20 N
Starting Torque 1 mN・m
Weight 0.4 kg
Compatibility counter TM-4100 Series Digital Tachometer TM-4300 Series Reversible Counter
Connection method Connector (RM12BPE-5S)

Related peripherals

Tachometer F/V converter
TM-4000 Series Digital Tachometer FV-1500
F/V converter
High-speed response type
TM4000 Series Digital Tachometer FV1500FV Converter High-Speed Response Type
Features
A high-precision, high-response tachometer that integrates the features of previous models.
TM-4100 series 1ch input
TM-4200 series 2ch input
TM-4300 series reversible
counter
TM-4400 series Passage time/
passing speed meter

Improved visibility with organic EL
Ethernet compatible (optional)
Customization is possible to match the connected devices.

 Features
Wide bandwidth 0.2 Hz to 320 kHz
Fast response: 1 period + 3.5 μs
Rapid deceleration tracking function that provides near-ideal output even when the frequency drops instantaneously.
Compatible sensors
RP Series
MP Series
SP-405ZA
LG series		 Compatible sensors
RP Series
MP Series

Last updated:2025/04/14