Introducing the Edwards Signaling SD-SJ SD Series SuperDuct 4-Wire Smoke Sensor, designed for seamless integration in tight spaces with a depth of less than 2 inches. This innovative sensor features a PCB-mounted photoelectric design, equipped with advanced on-board intelligence for enhanced performance. Its patented differential sensing technology ensures reliable environmental compensation, making it a top choice for safety and efficiency. Ideal for various applications, this smoke sensor operates on a versatile 24-230VDC/VAC voltage range. Don't compromise on safety—choose the Edwards Signaling SD-SJ for your smoke detection needs today!