HC-020K Motor Speed Measuring Module with Photoelectric Encoders

From the shop's description

HC-020K Motor Speed Measuring Module with Photoelectric Encoders HC-020K speed measuring sensor is a wide voltage, high resolution, short response time, and the switch output speed measurement module. It can test motor’s rotational speed with black encoder (measured spec. is related to the encoder, the inner diameter of D type encoder that provided is 4mm, can be used for motor output shaft w/ 4mm diameter, which is TT motor we matched, yellow shell and white axis). Features of HC-020K Double Speed Measuring Module with Photoelectric Encoders: Module Working Voltage: 4.5-5.5V Launch Tube Pressure Drop: Vf=1.6V Launch Tube Current: If<20mA Signal output: A, B two lines; TT power level; Resolution: 0.01mm Measurement frequency: 100KHz Disc diameter: 24mm Inner Disc Diameter: 4mm Encoder resolution: 20 lines Speed measuring sensor configuration: measure line 1 motor speed Application: For experiment