A communication system includes a first radio frequency identification (RFID) device coupled to a sensor that monitors a fire condition and a second RFID device. The first RFID device includes at least one first antenna that receives a fire detection signal from the sensor, and a processing circuit that causes the at least one first antenna to transmit a radio frequency (RF) signal corresponding to the fire detection signal through an internal volume of a pipe coupled to a fluid source. The second RFID device includes at least one second antenna that receives the RF signal through the internal volume of the pipe. The second RFID device controls operation of a fluid distribution device responsive to receiving the indication of the fire detection signal.

A communication system includes a first radio frequency identification (RFID) device coupled to a sensor that monitors a fire condition and a second RFID device. The first RFID device includes at least one first antenna that receives a fire detection signal from the sensor, and a processing circuit that causes the at least one first antenna to transmit a radio frequency (RF) signal corresponding to the fire detection signal through an internal volume of a pipe coupled to a fluid source. The second RFID device includes at least one second antenna that receives the RF signal through the internal volume of the pipe. The second RFID device controls operation of a fluid distribution device responsive to receiving the indication of the fire detection signal.

A fire-fighting nozzle includes a tubular inlet having an inlet opening, the inlet extending along a longitudinal axis from the inlet opening toward a shut-off valve, a tubular outlet having at least one nozzle opening, the outlet extending along a transverse axis transverse to the longitudinal axis toward the nozzle opening, and a sealing valve being arranged between the inlet and the nozzle opening and sealing the outlet in a sealing region with respect to the inlet. A radial distance of the sealing region from the longitudinal axis is smaller than or equal to a smallest radial distance of the inner circumferential surface of the inlet opening from the longitudinal axis in a region between the inlet opening and the sealing region.

A fire-fighting nozzle includes a tubular inlet having an inlet opening, the inlet extending along a longitudinal axis from the inlet opening toward a shut-off valve, a tubular outlet having at least one nozzle opening, the outlet extending along a transverse axis transverse to the longitudinal axis toward the nozzle opening, and a sealing valve being arranged between the inlet and the nozzle opening and sealing the outlet in a sealing region with respect to the inlet. A radial distance of the sealing region from the longitudinal axis is smaller than or equal to a smallest radial distance of the inner circumferential surface of the inlet opening from the longitudinal axis in a region between the inlet opening and the sealing region.

A sprinkler includes a frame, a deflector member, a sealing assembly, and a releasing mechanism for a controlled actuation. The releasing mechanism includes a hook member, a strut member, a load member, a link member, and an actuator. The link member surrounds or frames the strut and hook members and holds the members in a static relationship of an unactuated configuration. A preferred link member includes a single central slot through which each of the hook member and the strut member extend. The actuator is arranged with respect to the link member to separate the hook and strut members and break the link member upon operation of the actuator.

A sprinkler includes a frame, a deflector member, a sealing assembly, and a releasing mechanism for a controlled actuation. The releasing mechanism includes a hook member, a strut member, a load member, a link member, and an actuator. The link member surrounds or frames the strut and hook members and holds the members in a static relationship of an unactuated configuration. A preferred link member includes a single central slot through which each of the hook member and the strut member extend. The actuator is arranged with respect to the link member to separate the hook and strut members and break the link member upon operation of the actuator.

A system includes a fire panel 12 having a loop driver. A combined detection and suppression loop 18 is connected to the loop driver. A plurality of fire detection devices 14 and a plurality of fire suppression devices 19 are coupled to the detection and suppression loop 18. The fire suppression devices 19 includes multiple sprinkler devices 19, each of the sprinkler devices 10 including a sprinkler bulb 100 and a circuit 120. The circuit 120 of the sprinkler device 10 is detectable via the fire panel 12 using the detection and suppression loop 18 in order to provide information from the sprinkler device 19 to the fire panel 12.

A system includes a fire panel 12 having a loop driver. A combined detection and suppression loop 18 is connected to the loop driver. A plurality of fire detection devices 14 and a plurality of fire suppression devices 19 are coupled to the detection and suppression loop 18. The fire suppression devices 19 includes multiple sprinkler devices 19, each of the sprinkler devices 10 including a sprinkler bulb 100 and a circuit 120. The circuit 120 of the sprinkler device 10 is detectable via the fire panel 12 using the detection and suppression loop 18 in order to provide information from the sprinkler device 19 to the fire panel 12.

An unmanned aerial vehicle (“UAV”) system for fluid transport includes a UAV having a fluid chamber configured to transport a fluid, a processor, and a memory. The memory includes instructions which, when executed by the processor, may cause the system to receive a first location for collecting or releasing a fluid, determine a fluid level of the fluid chamber, and transport the fluid by the UAV to the first location based on the determined fluid level.

An unmanned aerial vehicle (“UAV”) system for fluid transport includes a UAV having a fluid chamber configured to transport a fluid, a processor, and a memory. The memory includes instructions which, when executed by the processor, may cause the system to receive a first location for collecting or releasing a fluid, determine a fluid level of the fluid chamber, and transport the fluid by the UAV to the first location based on the determined fluid level.