System Sensor 5251RB Rate-of-Rise Thermal Detector

System Sensor 5251RB is a rate-of-rise temperature sensor with 135F fixed temperature alarm. The model 5251RB System Sensor is intelligent sensor that utilize a state-of-the-art thermistor sensing circuit for a fast response. These sensors are designed to provide open area protection with a 50-foot spacing capability. Model 5251B is a fixed temperature sensor with a 135°F fixed temperature alarm.Model 5251RB System Sensor is a rate-of-rise temperature sensor with a 135°F fixed temperature alarm. Model 5251H is a high-temperature sensor with a 190°F fixed temperature alarm. Two LEDs on each sensor light to provide 360°F visibility of the sensor indication.The LEDs can be latched ON by code command from the panel for an alarm indication. The LEDs can also be unlatched to the normal condition by code command. Remote LED annunciator capability is available as an optional accessory