Photoelectric i3 Series Smoke Detector, 2-Wire with Thermal Sensor and Built-In Sounder, White

Photoelectric i3 Smoke Detector with Isolated Thermal Sensor, 4-Wire, Built-in Sounder, Form Relay, White

Photoelectric i3 Series Smoke Detector, 4-Wire, with Thermal Sensor and Built-In Sounder, White

135°F Fixed Temp / Rate-of-Rise Single-Circuit Mechanical Heat Detector