PHS-04 is a surface-mounted photocell sensor designed for automatic lighting control in outdoor installations. Made of durable plastic, it ensures reliable performance and easy integration into various lighting systems. With a 360 degrees detection angle and a maximum detection range adjustable from 1 to 8 meters (at 24 degrees C), PHS-04 provides comprehensive coverage for exterior areas. The sensor operates at an ambient light level of 5–100 lux, enabling automatic switching of lights at dusk and off at dawn. Rated IP44, PHS-04 is protected against dust and splashing water, making it suitable for outdoor use. Its practical construction and dependable operation make it an effective solution for energy-efficient lighting control in residential and commercial applications.