A retrofit unit for retrofitting a fire extinguisher, the retrofit unit including a body portion, having a connector for connection to the fire extinguisher, an electronic pressure sensor, connected to the body portion, and adapted to sense pressure within the fire extinguisher, a processor adapted to control operation of the pressure sensor and to receive at least one pressure signal sensed by the electronic pressure sensor, a power source adapted to provide power to the processor and to the electronic pressure sensor. The retrofit unit may be fitted onto a fire extinguisher for measuring pressure therein, instead of, or in addition to, a mechanical pressure gauge.

A small fire extinguisher equipped with a rotary knob includes: a body part storing loaded stream; a nozzle part that is attached to the top of the body part and includes a valve at the inner center where compressed the loaded stream is sprayed, and a key insertion part where an L-shaped lock key is inserted or removed; a button part that is inserted and attached to the top of the nozzle part to open and close the valve with the button vertically entering in and coming out of the nozzle part; a plate rotary knob that is attached to one side of the nozzle part, covers up one end of the nozzle part, contacts the top of the button part, and is attached with a lock key; and a lock key which is attached to the plate rotary knob and stops or rotates the plate rotary knob.

A small fire extinguisher equipped with a rotary knob includes: a body part storing loaded stream; a nozzle part that is attached to the top of the body part and includes a valve at the inner center where compressed the loaded stream is sprayed, and a key insertion part where an L-shaped lock key is inserted or removed; a button part that is inserted and attached to the top of the nozzle part to open and close the valve with the button vertically entering in and coming out of the nozzle part; a plate rotary knob that is attached to one side of the nozzle part, covers up one end of the nozzle part, contacts the top of the button part, and is attached with a lock key; and a lock key which is attached to the plate rotary knob and stops or rotates the plate rotary knob.

A method of designing a fire detection system comprising: determining a location of at least one of fire detection device, a fire suppression device, and a fire escape device within a building; determining a device location correctness for the location of at least one of the fire detection device, the fire suppression device, and the fire escape device within a building; and activating an alert in response to the device location correctness for at least one of the location of at least one of the fire detection device, the fire suppression device, and the fire escape device within a building.

A fire extinguisher is shown and described. The fire extinguisher may include a housing, a vessel positioned within the housing, the vessel retaining a fire suppression agent therein, and a discharge port positioned in the housing and operatively coupled with the vessel, where the fire suppression agent is capable of being expelled from the discharge port. The fire extinguisher may include an electrical connector positioned on the housing, the electrical connector capable of operatively securing to an electrical outlet, where the electrical connector is rotatable relative to the housing.

A fire extinguisher is shown and described. The fire extinguisher may include a housing, a vessel positioned within the housing, the vessel retaining a fire suppression agent therein, and a discharge port positioned in the housing and operatively coupled with the vessel, where the fire suppression agent is capable of being expelled from the discharge port. The fire extinguisher may include an electrical connector positioned on the housing, the electrical connector capable of operatively securing to an electrical outlet, where the electrical connector is rotatable relative to the housing.

Safety monitoring device for fire extinguishing systems includes a main body (1) couplable to any type of heads (2) of fire extinguishing systems screwed between the discharge valve (5) or device, that incorporates in general the fluid outlet (6), of as well electric, pneumatic, hydraulic or manual activation and the thread (4) of the valve, possessing a sensor (7), connected to an electronic board (8) and, through it, to a control room, programmable automaton or other control means of the extinguishing system, that detects whether the head (2) is correctly screwed and that, if it is not, sends a signal, through the electronic board (8), to the said control room of the installation.

Safety monitoring device for fire extinguishing systems includes a main body (1) couplable to any type of heads (2) of fire extinguishing systems screwed between the discharge valve (5) or device, that incorporates in general the fluid outlet (6), of as well electric, pneumatic, hydraulic or manual activation and the thread (4) of the valve, possessing a sensor (7), connected to an electronic board (8) and, through it, to a control room, programmable automaton or other control means of the extinguishing system, that detects whether the head (2) is correctly screwed and that, if it is not, sends a signal, through the electronic board (8), to the said control room of the installation.

A system comprising a fire extinguisher, one or more indicator devices disposed on the fire extinguisher adapted to actuate in a series representing a series of operations to be performed by a user for extinguishing a fire with the fire extinguisher, and a controller for controlling the actuation series of the one or more indicator devices.

A system comprising a fire extinguisher, one or more indicator devices disposed on the fire extinguisher adapted to actuate in a series representing a series of operations to be performed by a user for extinguishing a fire with the fire extinguisher, and a controller for controlling the actuation series of the one or more indicator devices.