IQ QS5519-840 Wireless 319.5MHz Heat Detector

Wireless heat detector with dual-trigger protection. Activates at fixed temperature (135°F or 200°F) or detects rapid temperature rise of 12–15°F per minute. Crystal-controlled 319.5 MHz transmission ensures reliable signal to your security system. Compact design (2.29" diameter) fits seamlessly into any space. Operates reliably in temperatures from -30°F to 167°F with 0–95% humidity tolerance. Ideal for kitchens, garages, and other high-heat environments where early fire detection matters.