Qolsys IQ Heat 135/200 Wireless Heat Detector (QS5519-840)
 
 
Description
The Qolsys IQ Heat 135/200 is a wireless heat detector designed to identify dangerous temperature conditions using both fixed temperature and rate-of-rise detection. With built-in electronic processing and wireless communication, it provides reliable fire protection in environments where smoke detection may not be suitable. The detector triggers alerts when preset temperature thresholds are reached or when rapid temperature increases are detected.
 
Key Features
Dual heat detection: fixed temperature and rate-of-rise
Selectable fixed temperature thresholds: 135°F or 200°F
Detects rapid temperature increases (rate-of-rise detection)
Wireless communication at 319.5 MHz
Long battery life (up to 10 years typical use)
Compact, low-profile design
Continuous monitoring with automatic reporting
 
Specifications
Fixed Temperature Settings: 135°F (57°C) or 200°F (93°C)
Rate of Rise: 12°F to 15°F per minute (6.7°C to 8.3°C)
Maximum UL Spacing: 50 ft x 50 ft (15.2 m x 15.2 m)
Frequency: 319.5 MHz (crystal-controlled)
Battery Life: Up to 10 years
Standby Current: < 0.9 μA
Supervision Interval: 62–68 minutes
Dimensions: 2.29” diameter x 1.28” height (58.25 mm x 32.4 mm)
Operating Temperature (UL Max Ceiling): 100°F / 150°F (37.8°C / 65.6°C)
Storage Temperature: -30°F to 167°F (-34°C to 75°C)
Humidity: 0–95% non-condensing
 
Compatibility
Qolsys IQ Panels
319.5 MHz systems
Important Notes
Designed for heat detection in areas where smoke detectors may not be ideal
Provides both fixed temperature and rapid temperature rise detection
Certified to UL 521, UL 985, CAN/ULC-S530 and other regulatory standards