Apollo Orbis I.S. A1R Heat Detector with Flashing LED (ORB-HT-51146-APO)

The Apollo Orbis I.S. A1R Heat Detector with Flashing LED (ORB-HT-51146-APO) provides reliable heat detection for hazardous environments where smoke detectors may not be suitable. Using a single thermistor network, it monitors the surrounding air temperature and responds to both fixed temperature levels and rapid rises in temperature, helping to provide early warning of developing fires.

Designed for use in intrinsically safe fire alarm systems, the ORB-HT-51146-APO performs well in environments where dust, smoke, steam, or airborne contaminants are present during normal operation. By responding to heat rather than smoke particles, it helps reduce false alarms while keeping reliable fire detection.

The integrated flashing LED provides clear visual indication of device status, while advanced Orbis technology improves detection reliability and helps minimise false alarms in dangerous industrial and challenging applications.

Key Features

• Intrinsically safe A1R rate-of-rise heat detector
• Integrated flashing LED
• Single thermistor heat sensing technology
• Responds to rapid temperature increases
• Suitable where smoke detectors are unsuitable
• Ideal for dusty or smoky environments
• Reduced false alarm incidence
• Increased detection reliability
• Designed for hazardous areas
• Reliable operation in harsh environments
• Compatible with Apollo Orbis intrinsically safe systems

Typical Applications

The Apollo ORB-HT-51146-APO is fitting for:

• Dusty environments
• Hazardous areas
• Offshore platforms
• Refineries
• Small to medium sized buildings
• Process plants
• Industrial facilities
• Areas where smoke detection may cause false alarms