Protech D4120 4-Wire Photoelectric Duct Smoke Detector

The innovair flex D4120 duct smoke detectors provide superb immunity to false alarms and easy, labor saving installation options. Its flexible configurations allow an easy Replacement to any model, and its 2 to 1 sensor to power board offers cost savings where both supply and return installation is required.

Features

• Plug-in sensor offers superb false alarm immunity and the latest sensor technology
• Increased wiring space with a newly added 3/4 in. Conduit knockout
• One easy-access test/reset button and improved LED status
• Patented interconnect feature for multi-fan shutdown
• New high contrast terminal designations