Product Overview

The SICK PeopleCounter LiDAR sensor is a high-precision, infrared-based people counting solution designed for reliable detection in industrial and commercial environments. Utilizing HDDM (Holographic Detection by Diffraction Method) technology, it accurately detects human presence without physical contact or line-of-sight requirements. The sensor operates with a scanning frequency of 50 Hz, comprising four independent channels at 12.5 Hz each, enabling robust and consistent counting performance. With a working range of up to 10 meters in width, the PeopleCounter delivers accurate results across diverse environments. Its compact design, IP67-rated enclosure, and support for Ethernet-based data transmission make it ideal for integration into automated monitoring systems where real-time occupancy data is essential.

Key Features and Technology

The SICK PeopleCounter leverages infrared light at 850 nm to detect human presence through HDDM technology, ensuring high sensitivity and accuracy in varying ambient conditions. The sensor features a scanning frequency of 50 Hz with four channels operating at 12.5 Hz each, enabling precise spatial analysis. Angular resolution is optimized at 0.0625° horizontally (interlaced at 0.125° and 0.25°), providing fine detail in horizontal coverage, while vertical resolution reaches 2.5°. Spot size of 10.4 mrad × 8.7 mrad ensures focused detection with minimal false positives. The sensor also provides IMU (Inertial Measurement Unit) data as secondary output for motion and orientation awareness. Response times are typically 20 ms for four-layer detection and 80 ms for single-layer detection, depending on filter settings and object size.

Technical Characteristics

The PeopleCounter delivers reliable performance across a scanning range from 16 m at 10% remission factor to 30 m at 90% remission factor. The working range is defined as 10 meters in width, with full operational capability up to 30 meters under optimal conditions. Spot size is precisely 10.4 mrad × 8.7 mrad. It operates within a supply voltage range of 10 V DC to 30 V DC and features M12 round connectors with swivel design (stainless steel) for secure, flexible installation. The housing is made from AlSi12 alloy, while the optics cover is polycarbonate. The device meets IP65 and IP67 protection standards (IEC 60529:1989+AMD1:1999+AMD2:2013), offering full dust and water resistance. Electrical safety complies with IEC 61010-1:2010-06, and the protection class is III (IEC 61140:2016-11).

Configuration and Integration

The SICK PeopleCounter supports Ethernet-based communication with TCP/IP and UDP/IP protocols, enabling seamless integration into existing industrial networks. Data transmission rates of up to 10/100 MBit/s ensure fast and reliable data transfer for real-time monitoring applications. The sensor outputs both primary counting data and IMU secondary sensor data, allowing advanced analytics such as motion tracking or orientation-based detection. Its compact dimensions (151.9 mm × 150 mm × 92.5 mm) and lightweight design (1.2 kg) facilitate easy mounting in tight spaces. The M12 swivel connector allows flexible positioning while maintaining secure mechanical connection. Integration is straightforward with standard industrial network infrastructure, supporting direct connectivity to PLCs, SCADA systems, or cloud-based platforms.

Operating Environment

The PeopleCounter is designed for operation in harsh industrial environments. It operates reliably under IP65 and IP67 ratings (IEC 60529:1989+AMD1:1999+AMD2:2013), ensuring complete protection against dust ingress and immersion up to 1 meter for 30 minutes. The device is rated for protection class III, meeting safety requirements for high-voltage environments. It functions within a supply voltage range of 10 V DC to 30 V DC and is suitable for use in temperatures ranging from -25°C to +70°C (as per standard operating conditions). Mechanical robustness is enhanced by its AlSi12 housing and stainless steel connectors, with vibration resistance rated at 15 g (11 ms, 6 single shocks/axis) and 10 g (16 ms, 1,000 continuous shocks/axis), ensuring durability in dynamic settings.

Industrial Applications

The SICK PeopleCounter is ideal for applications requiring accurate, non-contact human presence detection. It is widely used in manufacturing plants, warehouses, retail environments, and public spaces to monitor foot traffic or occupancy levels. Its ability to operate over a range of 16 m to 30 m at varying remission factors ensures consistent performance across different lighting and material conditions. The sensor’s high angular resolution and low false-positive rate make it suitable for precise counting in crowded or complex environments. With support for real-time data transmission via Ethernet, it enables integration into automated systems such as access control, energy management, or safety monitoring. Its rugged design and environmental resilience ensure long-term reliability in demanding industrial settings.