HKT22 overall

The HKT22 series are high performance two channel optical incremental housed encoders. These encoders emphasize high reliability, high resolution, and easy assembly. The HKT22 housed encoders use reflective technology to sense rotary position. The sensor consists of a LED source and a phototdetector IC in a single SO-8 surface mount package. The outputs of the HKT22 encoders are two square waves in quardrature. These encoders may be quickly and easily mounted to a motor.


Two channel quadrature output, quick and easy assembly, cost-effective, ideal for small motor systems, -10 C to 85 C operating temperature.


The HKT22 series provide motion detection at a low cost, making them ideal for high volume applications. Typical applications include vending machines and motor manufacturing.

Output Waveform

90 Output phase difference, CW rotation

(CW rotation as seen from fit surface)

ISN4005 rotation (4)

Square-wave accuracy: X1 + X2 = 1/2T 1/12T, X3 + X4 = 1/2T 1/12T

Pitch error of period: 0.01T

Pitch error of phase position: 1/18T

Z Phase: Tz=1/4T (1T,1/2T,1/4T…)

Period of pulses: T=360 /N (N: output pulses)

Signal accuracy: Xn=1/4T 1/12T (n=1,2,3,4)

A leads B clockwise when viewing the encoder shaft end.

The position of Z shaft against A,B phase is not specified.

Technical Specifications

Electrical specifications
Output wave Square wave
Output signals A,B, phase
Current consumption 35mA
Output current 2~12mA
Response frequency 0~30KHz
Output phase difference 90 45
Supply voltage 5V DC
Signal level VH 85% Vcc, VL 0.3V
Number of pulses 100,120,200,250,256,360 (other number of pulse available on request)
Output circuit Voltage
Mechanical Specifications
Rotor inertiaof code-wheel Appr. 4.0×10-8 Kgm2
Hollow shaft diameter 4mm (other diameter on request)
Shock resistance 980m/s2, 6ms, 2 hours each on XYZ
Vibration proof 50m/s2, 10~200Hz, 2 hours each on XYZ
Working life MTBF 50000h (+25 C, 2000rpm)
Weight Appr. =10g (with 0.5 meter cable)
Environmental Specifications
Working humidity 30~85% (no condensation)
Storage temperature -40 C~100 C
Working temperature -10 C~85 C
Protection class IP50

Terminal Assignment

Cable code 1 2 3 4 5
Voltage output 0V N.C SIG B Vcc SIG A

Ordering Code

HKT22 04 002 G 256 B 5 E
Series Hollow shaft diameter Sequence number Connection Number of pulese Output signals Supply voltage Output circuit

Selection Guide (2)


HKT22 dimensions

Motors described above are typical and can be customized upon request.

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