The Keyence EH-402 is a cylindrical, non-shielded inductive proximity sensor designed to provide reliable metal detection with high precision and stability. Built for use in demanding industrial applications, the EH-402 combines advanced detection performance with a durable structure to meet the needs of modern automation environments. Its unshielded design extends sensing capability, making it particularly useful in setups where greater detection distance and flexibility are required.

A key strength of the EH-402 lies in its accuracy and repeatability. With a repeatability of just 0.002 mm, it ensures consistent performance, which is critical for applications involving fine positioning or quality control. The sensor delivers a stable detecting range from 0 to 3 mm, with the ability to reach up to 7 mm in maximum detecting distance. This makes it an adaptable solution for a variety of detection tasks, ranging from part confirmation in assembly lines to object presence monitoring in production processes.

Durability is another cornerstone of the EH-402. Its IP67-rated enclosure safeguards the sensor from dust ingress and water exposure, which is essential for maintaining performance in environments where cleaning, moisture, or airborne particles are common. In addition, its design allows it to withstand a wide operating temperature range of -10 to +60 °C. Combined with excellent temperature characteristics of +30% / -10% of the detecting distance, the EH-402 maintains dependable detection stability even under fluctuating thermal conditions.

The sensor’s unshielded, cylindrical design enhances its versatility in installation. Unlike shielded models, the EH-402 can be mounted in positions that provide longer sensing distances, which makes it suitable for use in applications where space or target position requires greater flexibility. The compact build, weighing only about 28 g including the attached 3-meter cable, ensures easy integration without adding extra load or requiring large installation space.

In addition to its rugged build, the EH-402 delivers reliable detection of ferrous metals, with specifications also supporting performance for nonferrous targets. Its low hysteresis of just 0.04 mm minimizes detection errors, reducing false signals and ensuring smooth automation flow. This makes the sensor particularly effective in high-speed or repetitive operations where consistent output is necessary.

Overall, the Keyence EH-402 is a precise, durable, and adaptable sensor head that addresses the critical requirements of modern automated systems. By combining high accuracy, robust construction, and extended sensing capability, it offers reliable performance across a wide range of applications in manufacturing, assembly, and quality assurance.