Product Overview

The SICK L41 safety light-beam sensor is a Type 4 safety device designed for reliable detection of objects in industrial environments. It operates using a single scanning beam with a maximum range of 16 meters, ensuring effective coverage across various applications requiring safe zone monitoring. As a certified Type 4 (IEC 61496-1) sensor, it provides high-level safety performance when used in conjunction with an appropriate test device such as the Flexi Classic or Flexi Soft. The sensor features a robust construction with nickel-plated brass housing and PMMA front screen, offering durability against mechanical stress and environmental exposure. With a mission time of 20 years (EN ISO 13849), it ensures long-term operational safety and reduces maintenance needs. Its IP67 enclosure rating makes it suitable for harsh industrial conditions, while its compact M18 x 85.3 mm dimensions allow easy integration into existing systems.

Key Features and Technology

The L41 leverages advanced optical scanning technology to detect objects within a single beam over a range of up to 16 meters. It operates with an ultra-fast response time of 0.2 ms, enabling immediate reaction to potential intrusions. This performance is critical in dynamic environments where rapid detection and safety response are essential. The sensor complies with IEC 61496-1 Type 4 classification, ensuring it meets stringent safety requirements for use in hazardous areas. It is designed specifically for use with a test device (e.g., Flexi Classic or Flexi Soft), which is required to verify and maintain the sensor’s operational integrity over time. The housing material—nickel-plated brass—provides excellent corrosion resistance, while the PMMA front screen ensures clear beam transmission without degradation. With an EC-Type-Examination approval, it meets regulatory standards for use in safety-critical applications.

Technical Characteristics

The SICK L41 has a scanning range of 16 meters and features one beam for object detection. Its response time is 0.2 ms, with an additional 0.2 ms + test device response time component when used in safety-critical systems. The sensor is classified as Type 4 (IEC 61496-1) and has a mission time of 20 years according to EN ISO 13849 standards. It connects via a male M12, 4-pin, angled connector for secure and reliable signal transmission. The current-carrying capacity per OSSD is ≤70 mA, ensuring safe operation under electrical load conditions. Dimensions are 18 mm in diameter by 85.3 mm in length, with a unit weight of 0.129 kg (net). The housing is made from nickel-plated brass and the front screen is constructed from PMMA. It operates within an ambient temperature range of –40 °C to +55 °C and can be stored between –40 °C and +75 °C.

Configuration and Integration

The L41 safety light-beam sensor is designed for integration into safety circuits using a standard male M12, 4-pin, angled connector. It must be used in combination with an appropriate test device such as the Flexi Classic or Flexi Soft to verify its operational status and ensure compliance with safety standards. This requirement ensures ongoing validation of the sensor’s performance over time. The sensor is suitable for use in both fixed and mobile applications where reliable object detection is required. Its compact size and robust design allow it to be mounted in tight spaces without compromising functionality. Integration into existing safety systems is straightforward due to its standardized interface and clear documentation of operational parameters.

Operating Environment

The SICK L41 is designed for operation in extreme ambient temperatures ranging from –40 °C to +55 °C, making it suitable for use in cold storage facilities, outdoor environments, or high-temperature industrial processes. It can be stored within a temperature range of –40 °C to +75 °C, ensuring availability even under harsh conditions. The IP67 enclosure rating provides complete protection against dust ingress and temporary immersion in water up to 1 meter for 30 minutes, enhancing reliability in wet or dirty environments. The sensor is rated for use in hazardous areas due to its Class III (IEC 61140) protection classification and EC-Type-Examination approval. These features ensure consistent performance across a wide range of industrial settings.

Industrial Applications

The L41 safety light-beam sensor is ideal for applications requiring reliable object detection in fixed or moving zones, such as machine guarding, conveyor line monitoring, and access control systems. Its 16-meter scanning range allows it to cover large areas effectively while maintaining high sensitivity. It is commonly used in environments where personnel or equipment must be protected from unintended entry into hazardous zones. The sensor’s fast response time and long mission life (20 years) make it suitable for continuous operation in demanding industrial processes. Its robust construction and IP67 rating ensure durability in dusty, wet, or corrosive settings typical of manufacturing and processing environments.