Capable of detecting the contents of cardboard and plastic containers, the Model HSLS-12 super high intensity sensing system claims to deliver 12 times the optical power of similar sensors. The system includes a dual LED light source and a complementary receiver. Features include a contrast indicator for performance monitoring and setup, pulse modulation, complementary NPN/PNP output transistors, and a response time of 800 µs. For further details and price, call TRI-TRONICS CO., INC., Tampa, FL. (800) 237-0946.