The Keyence PK-72 is a long-distance reflective photoelectric sensor engineered to deliver reliable detection performance across a wide range of industrial applications. Designed with durability, flexibility, and precision in mind, it is particularly effective in environments where both transparent and opaque materials must be consistently detected over extended distances.

One of the defining characteristics of the PK-72 is its extended detection range, covering 80 to 200 mm when used with a 10 √ó 10 cm white mat paper as the reference target. This long-range capability makes it suitable for installations where sensors need to be mounted at greater distances from objects, such as in packaging lines, assembly systems, or conveyor-based automation. With a spot diameter of 11 mm or less, the sensor provides focused and reliable detection even at the far end of its range.

The PK-72 employs a red LED light source, optimized for stable object recognition across different surface conditions. Its ability to detect both transparent and opaque objects ensures flexibility, allowing it to be used in diverse applications such as film detection, glass inspection, plastic container handling, or standard opaque material sensing. To fine-tune detection in various setups, the unit includes a 1-turn trimmer (240°) for sensitivity adjustment, enabling operators to adapt it quickly to specific environments and targets.

Speed and responsiveness are key aspects of the PK-72’s design. With a response time of 2 ms maximum, it ensures fast detection for high-speed production lines. The unit also provides switch-selectable LIGHT-ON/DARK-ON operation, giving users the ability to configure the sensor according to control logic requirements. The built-in red LED output indicator further simplifies monitoring, allowing operators to verify operational status instantly.

In terms of electrical performance, the PK-72 is designed with robust control output capability. It features an NPN open-collector output rated at 100 mA max. (24 VDC max.) with a residual voltage of 1 V or less. Additionally, the unit is equipped with essential protection circuits including reversed polarity and surge voltage protection, ensuring long-term operational reliability even under demanding electrical conditions.

Durability is another strength of the PK-72. Its IP67-rated housing provides full protection against dust ingress and resistance to water, making it suitable for challenging environments. The fiberglass reinforced plastic case enhances mechanical robustness, while its resistance to vibration (10–55 Hz, 1.5 mm double amplitude) and shock (up to 1,000 m/s²) ensures stable operation in heavy-duty industrial setups. Withstanding ambient temperatures from -10 to +50 °C and relative humidity between 35 to 85%, the sensor performs reliably under a broad range of conditions.

Weighing just 75 g including a 2-meter cable, the PK-72 is lightweight yet highly durable, making installation easy without compromising on strength. Its compact size and robust design enable integration into tight spaces while maintaining dependable long-range detection.

In summary, the Keyence PK-72 is a versatile, long-distance photoelectric sensor that combines extended range, fast response, flexible detection, and rugged durability. It is an ideal choice for industries that require dependable object detection in demanding environments, offering both performance and reliability in a compact package.