SYSTEM SENSOR 5251H

Product Overview

The System Sensor 5251 series consists of intelligent thermal sensors equipped with an advanced thermistor sensing circuit for rapid response to fire conditions. These detectors are designed for open area protection, supporting spacing of up to 50 feet, as certified by UL 521.

Each sensor features two LEDs providing 360° visibility of status. The LEDs can be latched on via panel command to indicate an alarm condition and unlatched to return to normal status. Optional remote LED annunciators (RA400Z/RA100Z) are available for additional remote indication.

Key Features

• Intelligent thermistor sensing for fast and reliable response
• Suitable for open area protection with up to 50-foot spacing
• 5251B: 135°F fixed-temperature detection
• 5251RB: Rate-of-rise plus 135°F fixed-temperature detection
• 5251H: 190°F high-temperature detection
• Dual LEDs for full 360° visibility of alarm status
• LEDs can be latched/unlatched via panel command