The Keyence EX-502 Amplifier Unit is a high-performance inductive displacement controller designed to provide accurate measurement, robust functionality, and durability for industrial automation systems. Built in a threaded M8, non-shielded form factor, the EX-502 is optimized for precise detection and stable measurement across a wide range of applications.

With a measuring range of 0 to 2 mm, the EX-502 is ideal for fine displacement and proximity measurement tasks. It delivers high accuracy with ±0.3% full-scale linearity and an impressive resolution of 0.03% F.S., ensuring reliable performance in demanding precision environments. These specifications make the amplifier suitable for applications such as thickness monitoring, part positioning, and runout detection in manufacturing and quality control processes.

One of the key advantages of the EX-502 is its fast and flexible response capability. The unit offers four selectable response time modes—0.1 ms, 1 ms, 10 ms, and 100 ms—allowing users to balance between speed and stability based on specific process requirements. The ultra-fast 0.1 ms mode supports rapid production lines, while longer response settings filter out noise for stable detection.

The amplifier also integrates a range of advanced functional features to enhance usability and adaptability. These include auto-zero and auto-span functions for quick calibration, a preset metal characteristic memory function for material-based optimization, and a cable length selector function to maintain accuracy with varying cable lengths. In addition, an interference suppression function ensures stable operation when multiple sensors are installed close together.

For signal output, the EX-502 provides dual analog outputs, supporting both 0 to 5 V voltage output and 4 to 20 mA current output, ensuring compatibility with a wide variety of control systems. The amplifier also includes a disconnection alarm output (N.C. type, NPN 100 mA max.), which notifies operators in case of cable or sensor head disconnection, adding another layer of system reliability.

Durability is a core feature of the EX-502. Built with an IP67 enclosure rating, the amplifier is resistant to dust, water, and harsh operating conditions. It is capable of withstanding vibration (10–55 Hz, 1.5 mm double amplitude, 2 hours in each axis) and shock resistance up to 500 m/s², ensuring stable operation in tough environments. With an operating temperature range of 0 to +50 °C and resistance to high humidity (35–85% RH), it adapts well to typical factory conditions.

The unit’s compact build and robust weight of approximately 360 g reflect its industrial-grade design, while its 12 to 24 VDC power supply requirement with efficient consumption ensures ease of integration into existing systems.

In summary, the Keyence EX-502 Amplifier Unit combines precision measurement, fast response, advanced functions, and rugged durability, making it an essential tool for industries requiring accurate displacement sensing. It is ideally suited for automotive, semiconductor, precision machining, and assembly line applications, where reliability and accuracy directly impact productivity and quality.