The Pilz PSEN 1.1B-23 / PSEN 1.1-20 / 8 MM / 10 M / EX / 1 (504250) is a rugged, ATEX-certified safety switch designed for use in hazardous industrial environments where combustible dust presents an operational risk. As part of Pilz’s trusted PSEN non-contact safety switch range, it combines compact design, long cable reach, and international certification to deliver reliable protection for both people and machinery.

Engineered for 24 V DC operation, the switch is straightforward to integrate into existing automation and safety circuits. Both the supply voltage and switching voltage are 24 V, which aligns with standard industrial control systems. This compatibility ensures quick installation and reduces the need for additional adaptations when retrofitting into established setups.

One of the standout features of this model is its ATEX certification. Certified under SEV 12 ATEX 0121 X and classified as II 3D Ex mc tc IIIC T80°C, the PSEN 1.1B-23 is approved for use in explosive dust zones (Zone 22). This makes it particularly suitable for industries such as food processing, pharmaceuticals, grain handling, chemicals, and other facilities where dust accumulation can create hazardous conditions. Operators can rely on this device to deliver safe, compliant performance even in sensitive applications.

The switch offers a sensing distance of 8 mm, providing precise monitoring of protective equipment such as guards, flaps, or safety covers. Its compact sensing range allows for installation in tight spaces while still ensuring accurate detection and dependable switching. The addition of a 10-metre cable gives installation teams flexibility to route connections efficiently across larger machines, production lines, or control cabinets without the need for extensions.

Durability is central to the PSEN 1.1B-23’s design. Built for long-term use in demanding conditions, it can withstand mechanical stress, fluctuating temperatures, and exposure to industrial dust without compromising performance. Its non-contact design also reduces wear and tear, extending service life compared to traditional mechanical switches.

For integrators and end users, the benefits are clear:

Enhanced safety compliance in dust-hazardous zones through ATEX certification.

Simplified integration into 24 V control environments.

Flexible installation with a 10 m pre-assembled cable.

Reliable performance with compact sensing and durable construction.

In summary, the Pilz PSEN 1.1B-23 / PSEN 1.1-20 / 8 MM / 10 M / EX / 1 (504250) is a specialised safety switch designed to meet the highest demands of hazardous dust environments. With its ATEX approval, 8 mm sensing distance, long cable reach, and robust build quality, it ensures reliable, compliant, and efficient monitoring for industrial safety applications where reliability cannot be compromised.