Nemicon – Miniature Encoder 18S

Miniature Shaft type High Resolution (Outer Diameter φ18mm)

Brand : Nemicon

The Nemicon 18S Series is a miniature shaft type incremental rotary encoder designed for accurate motion feedback in compact automation equipment. With an outer diameter of 18 mm and a solid shaft diameter of 2.5 mm, the encoder provides precise position and speed detection while maintaining a compact footprint suitable for integration into small motors, robotics, and industrial control devices. Its durable mechanical structure and stable signal output allow reliable operation in demanding motion control environments.

The 18S encoder supports a wide range of resolutions from 100 to 1600 pulses per revolution, offering flexibility for applications that require different levels of positioning accuracy. It provides A, B, and Z phase output signals and supports selectable output modes such as open collector and line driver, enabling compatibility with PLCs, controllers, and motion systems. The encoder is capable of high response frequency and rotational speed, making it suitable for automation equipment, CNC machinery, and precision motion control systems.

For more info, download our full technical spec.

Specifications

Parameter Specification
Encoder Type Incremental Rotary Encoder (Shaft Type)
Outer Diameter 18 mm
Shaft Diameter 2.5 mm Solid Shaft
Resolution 100 to 1600 pulses per revolution (P/R)
Output Signals A, B, Z Phase
Output Type Open Collector or Line Driver
Power Supply DC 4.5 to 13.2 V (Open Collector) / DC 4.5 to 5.5 V (Line Driver)
Maximum Response Frequency 120 kHz to 240 kHz depending on resolution
Maximum Permissible Speed 6000 rpm
Operating Temperature -10°C to +85°C
Storage Temperature -30°C to +85°C
Humidity 85% RH max without condensation
Ingress Protection IP50
Weight 20 g max without cable

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