Abstract: An indicator assembly for a visual life safety alarm is provided including a hollow, generally frustoconical reflector ring having an angled wall. The reflector ring is mounted to a housing of the visual life safety alarm at a first end. A first plurality of light devices is mounted to the housing within a first opening of the first end of the reflector ring. Light from the first plurality of light devices is configured to emit in a generally forwards direction. A second plurality of light devices is mounted to the housing near the angled wall of the reflector ring, opposite the first plurality of light devices. Light from the second plurality of light devices is configured to reflect from the angled wall in a direction generally angled from the visual safety alarm.

Abstract: Embodiments relate to systems for, and methods of, providing low nuisance, fast response hazard notification. Advantageously, the disclosed techniques avoid sounding an alarm in response to typical nuisance events, such as burnt food.

Abstract: A life safety device includes a battery assembly with a rechargeable battery. Extended shelf life is achieved by annually initiating an over-discharge protection mode in which a battery protection circuit prevents current flow from the battery. The life safety device remains in the over-discharge protection mode until the device is connected to a charging power source at the time of installation. The battery assembly then exits the protection mode and enters its normal mode of operation.

Abstract: When a rechargeable battery of a life safety device reaches its end of life, the life safety device provides an audible signal indicating that replacement is required. When the device is disconnected from line power, the rechargeable battery still contains a significant amount of energy. The device automatically begins controlled discharge the battery until the stored energy has been reduced to a safe level for disposal of the life safety device and its battery.

Abstract: When a rechargeable battery of a life safety device reaches its end of life, the life safety device provides an audible signal indicating that replacement is required. When the device is disconnected from line power, the rechargeable battery still contains a significant amount of energy. The device automatically begins controlled discharge the battery until the stored energy has been reduced to a safe level for disposal of the life safety device and its battery.

Abstract: A life safety device includes a battery assembly with a rechargeable battery. Extended shelf life is achieved by annually initiating an over-discharge protection mode in which a battery protection circuit prevents current flow from the battery. The life safety device remains in the over-discharge protection mode until the device is connected to a charging power source at the time of installation. The battery assembly then exits the protection mode and enters its normal mode of operation.

Abstract: A life safety device can include a battery monitoring module configured to measure a voltage level of a battery, an alarm module configured to provide an alarm when the voltage level is less than or equal to a low battery threshold, and a silence module configured to silence the alarm for a random time period.

Abstract: A life safety device can include a sensor configured to sense a hazardous condition, an interconnect module configured to communicate the hazardous condition to a wired life safety device using one or more wires, and a transceiver module configured to wirelessly communicate the hazardous condition to a wireless life safety device.

Abstract: A method of radio frequency communication for a life safety device including a controller, a hazardous condition sensor, an alarm device, and a radio frequency communications device including transmitting and receiving capability. One method includes receiving a test signal using the radio frequency communications device, lowering a voltage to the hazardous condition sensor to simulate a hazardous condition to test the hazardous condition sensor, and emitting an alarm using the alarm device if the hazardous condition sensor passes the test. Another method includes before transmitting a radio frequency signal, turning on the radio frequency communications device for a period of time, and delaying transmission if the radio frequency communications device receives a header, deadtime and startbit. Yet another method includes sending a test signal at a first transmission power level, and sending an alarm signal at a second transmission power level greater than the first transmission power level.

Abstract: A flame detector system includes an ultraviolet sensor to detect ultraviolet radiation, and a microcontroller coupled to the ultraviolet sensor. The microcontroller processes output from the ultraviolet sensor to identify a flame. The system can also include a HV supply circuit to constantly refresh a drive voltage of the sensor. The microcontroller can sense when the sensor discharges and thereupon immediately refresh the sensor. The microcontroller can also monitor a run time for the sensor and adjust a drive voltage for the sensor accordingly. Further, a background count can be monitored to determine the health of the sensor. A memory can also be provided to store data associated with the detector, and a communications module can communicate the data stored in the memory to an external device. The microcontroller calculates a filtered event count and compares the filtered event count to a threshold to determine if a flame is present.