The Keyence AP-31 is a high-precision negative pressure sensor engineered to deliver accurate and real-time measurement of vacuum levels in industrial systems. This main unit is an integral part of the Keyence AP series and is optimized for use in environments that require the monitoring of suction or vacuum pressure, with a measuring range of 0 to -101.3 kPa (equivalent to 0 to -760 mmHg).

Designed for applications involving air or non-corrosive gases, the AP-31 is commonly used in vacuum handling systems, pick-and-place robotics, leak testing equipment, and pneumatic automation systems. It supports gauge pressure readings, ensuring reliable feedback for systems operating under atmospheric reference.

At the front of the unit is a bright and easy-to-read 3 ¬Ω-digit LED display with a 2-color (red/green) output that provides immediate visual feedback of the current pressure level. The color changes help indicate normal operation or alert users to conditions outside set thresholds, enabling quick diagnostics and improved operational awareness. The 11 mm character height further enhances readability from a distance or in low-light industrial environments.

The AP-31 comes with an NPN analog output, allowing direct connection to PLCs or control devices for data logging, process control, or alarm triggering. This ensures compatibility with standard industrial automation systems, while maintaining fast response and accuracy.

Built for durability, the AP-31 maintains performance in demanding environments where reliable vacuum pressure monitoring is essential. Its compact footprint allows for flexible installation, whether in control panels or directly on machinery, without taking up unnecessary space.

In summary, the Keyence AP-31 combines reliable vacuum pressure monitoring with user-friendly features and flexible system compatibility. Its accuracy, clear display, and robust construction make it a trusted solution for automation engineers and technicians working with vacuum-based applications across various industries.