Abstract: A sealable capsule configured to contain one or more fire extinguishing materials is provided. The sealable capsule can include an upper and a lower shell, an internal bladder and a mechanism for releasing the fire extinguishing materials. The upper shell can include a valve, one or more through-holes filled and sealed with a corresponding number of plugs, and one or more rods, each extending from the plug to an internal plate of the releasing mechanism. The upper shell can be configured to contain a first fire extinguishing material, and the lower shell can include a membrane configured to contain a second fire-extinguishing material. The bladder can be coupled to the internal plate and to the upper and lower shells, such that the bladder is positioned within the capsule in a first position when the capsule is prepared for use and in a second position when the capsule has been activated.

Abstract: The invention relates to a safety method for an emergency vehicle, the emergency vehicle being configured to be autonomously operated and comprising: an energy storage unit; sensor devices arranged to monitor the surroundings and the vehicle; a water pump; at least one connection unit for an external water source and/or a water hose; conduits arranged in fluid communication with the water pump and/or the at least one connection unit; a valve arrangement arranged in fluid communication with the water pump, the at least one connection unit and the conduits, the method comprising: receiving a command from a control center to operate the vehicle to a location associated with an emergency situation; operating the vehicle to the location; and controlling the vehicle to perform a safety function to alleviate the emergency situation.

Abstract: A fire suppression apparatus for a vehicle includes: a docking unit disposed on an exterior panel of a vehicle body, the exterior panel configured to cover an interior space of the vehicle wherein the docking unit comprises a hole through which a fire-fighting hose or a spray nozzle, which is connected to the fire-fighting hose, for supply of fire-fighting water pass to be coupled to the docket unit; a supply pipe having a first end connected to the docking unit; and a nozzle assembly arranged in the interior space in the vehicle and connected to a second end of the supply pipe, the nozzle assembly being configured to spray the fire-fighting water, which is supplied through the supply pipe from the fire-fighting hose or the spray nozzle, in order to respond to the outbreak of a fire in the interior space of the vehicle.

Abstract: A fire suppression apparatus is configured to spray a fire suppressant agent and includes a reservoir and a nozzle. The nozzle is fluidly coupled to the reservoir and includes an inlet aperture, an outlet aperture, a passageway, and a diverter. The passageway extends between the inlet aperture and the outlet aperture. The diverter is disposed within the passageway and includes multiple diverter passageways configured to receive the fire suppressant agent from an inner volume of the diverter and direct the fire suppressant agent towards an inner sidewall of the passageway.

Abstract: Systems for improving fire safety in agricultural machinery are configured for detecting, at least partially controlling, and/or suppressing adverse fire-related conditions. The adverse fire-related conditions can include sparks, embers, and/or flames in the agricultural machinery.

Abstract: A liquid monitoring system includes a remote measurement device located at a location of the fire hydrant that is in contact with water provided by a water main. The remote measurement device has sensors that measure characteristics of the water and a communication interface that transmits measured information to a communication network device that may be located elsewhere on the fire hydrant. The communication network device communicates with a communication network.

Abstract: A nozzle access device is configured to be installed in a structural element and to accept connection by a fire hose nozzle to introduce firefighting fluid into an enclosed space. The device has a housing configured to be inserted in a hole formed in the structural element. The housing has a cylindrical body and a first face with an opening surrounded by an inwardly extending cylindrical socket. The housing has a second face, with an opening, which is attached to the cylindrical body. A movable nozzle connector in the housing has a connection portion configured to receive an inserted fire hose nozzle in a locking connection and a cylindrical nozzle stop portion extending from the connection portion. The nozzle stop portion is movably coupled within an interior of the socket of the first face.

Abstract: A nozzle access device is configured to be installed in a structural element and to accept connection by a fire hose nozzle to introduce firefighting fluid into an enclosed space. The device has a housing configured to be inserted in a hole formed in the structural element. The housing has a cylindrical body and a first face with an opening surrounded by an inwardly extending cylindrical socket. The housing has a second face, with an opening, which is attached to the cylindrical body. A movable nozzle connector in the housing has a connection portion configured to receive an inserted fire hose nozzle in a locking connection and a cylindrical nozzle stop portion extending from the connection portion. The nozzle stop portion is movably coupled within an interior of the socket of the first face.

Abstract: A nozzle access device is configured to be installed in a structural element and to accept connection by a fire hose nozzle to introduce firefighting fluid into an enclosed space. The device has a housing configured to be inserted in a hole formed in the structural element. The housing has a cylindrical body and a first face with an opening surrounded by an inwardly extending cylindrical socket. The housing has a second face, with an opening, which is attached to the cylindrical body. A movable nozzle connector in the housing has a connection portion configured to receive an inserted fire hose nozzle in a locking connection and a cylindrical nozzle stop portion extending from the connection portion. The nozzle stop portion is movably coupled within an interior of the socket of the first face.

Abstract: A method for introducing at least one extinguishing agent into a battery, in particular into a high-voltage battery for a motor vehicle. The at least one extinguishing agent is introduced into a housing of the battery that is at least partially sealed against the penetration of water, in which a plurality of battery cells are arranged. For this purpose, a through-opening is created in a partial region of a wall of the housing, wherein the partial region is penetrated by means of an end region of an extinguishing device. At least one extinguishing agent is introduced into the housing of the battery through a supply channel of the extinguishing device. In addition, the invention relates to an extinguishing device.

Abstract: A nozzle access device is configured to be installed in a structural element and to accept connection by a fire hose nozzle to introduce firefighting fluid into an enclosed space. The device has a housing configured to be inserted in a hole formed in the structural element. The housing has a cylindrical body and a first face with an opening surrounded by an inwardly extending cylindrical socket. The housing has a second face, with an opening, which is attached to the cylindrical body. A movable nozzle connector in the housing has a connection portion configured to receive an inserted fire hose nozzle in a locking connection and a cylindrical nozzle stop portion extending from the connection portion. The nozzle stop portion is movably coupled within an interior of the socket of the first face.

Abstract: An aircraft comprises a fuselage having a compartment, and a fire suppression system for delivering fire suppressant to the compartment. The system includes at least one suppressant concentration sensor located in the compartment, a valve for regulating flow of the fire suppressant to the compartment, and a controller, responsive to the sensor, for controlling the valve to maintain fire suppressant concentration within the compartment at a target concentration.

Abstract: A nozzle is disclosed for use within a filter for inputting a jetting stream into the filter media to clean the filter media. The nozzle comprises an inlet for communication with a jetting stream source, and a plurality of plates stacked parallel and abutting one another. The plurality of plates comprises at least a top plate and a bottom plate, one of the plates having an aperture through the center thereof for receiving the jetting stream, wherein between adjacent plates at least one space is provided extending from the outside edge of the plates to the interior of plates and in fluid communication with the aperture for channelling the jetting stream radially outward from and substantially parallel with the longitudinal plane of the plate.

Abstract: A smoke eliminator device is provided. The smoke eliminator device is especially suitable for removing smoke from a room or building so as to allow a firefighter to more easily rescue individuals and extinguish fires. The device is a lightweight elongated tube which connects to a standard fire hose. Water emitted from the distal end of the device creates a suction which pulls smoke out of the room or building. A glass-breaking device is located near a distal end of the device to allow the device to easily penetrate a window wherein it may be effective. A cooling nozzle allows for the extinguishing of fire by water spray. An extension may be added to the device to allow the device to be utilized in the upper floor of a building. The device may further have a bend which allows a user to utilize the device directly below a window of an upper floor.

Abstract: A piercing nozzle may comprise a body having a first section, a second section substantially parallel the first section, and an offsetting section disposed so as to provide a distance between the first section and the second section, a piercing tip coupled to the second section, and a hose coupling coupled to the first section. An aperture may be formed in the second section, and a deflector may be pivotably coupled to the second section so as to substantially cover the aperture.

Abstract: A drilling and through-wall fire extinguishing device comprises a main water turbine, a forward and reverse commutator, a reducing sleeve, a hollow drill bit, a handwheel booster, a guide rail, a water separator, a vice water turbine and a high pressure water pump. The handwheel booster is connected with the main water turbine, the main water turbine is drivingly connected with the hollow drill bit through the forward and reverse commutator, the reducing sleeve is arranged between the hollow drill bit and the forward and reverse commutator, and the main water turbine and the forward and reverse commutator are fixed on the guide rail; and fire-fighting pressure water is fed by the water separator, a first water outlet of the water separator is communicated with the main water turbine, a second water outlet is communicated with the vice water turbine, and the vice water turbine is drivingly connected with the high pressure water pump.

Abstract: A fixed spray application system generally includes tubing, one or more spray heads, one or more brackets, one or more connectors and one or more fluid reservoirs. One or more of the spray heads may be suspended from a tube below one of the connectors and below one of the reservoirs. A tube may extend from below one of the reservoirs to another spray head supported by one of the brackets. In use, the system may be suspended from trellis wires in an agricultural field. Water, pesticides or other liquids are supplied to the system through the tubing. The size of the reservoirs and the volume of tubing can be selected to hold the desired amount of liquid for a given application. After the system is primed with liquid, the tubing is connected to a source of pressurized air. The air is supplied to the system at a sufficient pressure so as to force the liquid from the system through the spray heads.

Abstract: A float device for use in a body of water includes a float configured to transform between a deflated state and an inflated state. The float includes at least one internal chamber. The float includes a manual inflation value configured to provide a passageway for adding gas to the at least one internal chamber and a deflation valve configured to provide a passageway for releasing gas from the at least one internal chamber. A float attachment member is attached to the float, such that when the float is placed in the body of water, the float attachment member is underwater.

Abstract: A system, device, and method for plugging core holes. A core hole plug includes a top compression plate, a bottom compression plate, and a rubber expansion ring that separates the top and bottom compression plates. A beveled screw hole can be created on the top compression plate. The beveled screw hole matches the angle of the bottom surface of the head of a flat head bolt to ensure that the bolt remains flush with the top compression plate. The rubber expansion ring can be squeezed between the top and bottom compression plates as the flat head bolt is screwed into a threaded receiver nut formed on the bottom compression plate. An installation tool can be utilized to install the core hole plug so that the top compression plate remains flush with an existing floor surface.

Abstract: A firefighting method and apparatus are described for suppressing fires in remote dried out former wetlands/marsh areas. A water pump is positioned upon a floating platform maneuverable in adjacent shallow marsh waters that are not navigable by conventional watercraft. Said pump has an intake port for drawing water from nearby marsh waters and ponds through a hose, said hose having a filtering screen for preventing the pickup of solid materials. The pump has a discharge hose connected to the outflow connection, said discharge hose connected on the distal end to a piping extension projecting away from the hull and over the nearby burning peat lands. Said pump is operated to discharge water over and into the adjacent burning marsh as the platform is maneuvered within the surrounding marsh canals and waterways.

Abstract: A float device for use in a body of water includes a float configured to transform between a deflated state and an inflated state. The float includes at least one internal chamber. The float includes a manual inflation value configured to provide a passageway for adding gas to the at least one internal chamber and a deflation valve configured to provide a passageway for releasing gas from the at least one internal chamber. A float attachment member is attached to the float, such that when the float is placed in the body of water, the float attachment member is underwater.

Abstract: Tools and techniques for suppressing fires. Such tools might transmit a signal that generates one or more waves (which might be mechanical waves, electromagnetic waves, and/or the like) that is sufficient to disrupt the relationship between the electrons in a fire and the ionized nuclei to which those electrons are attracted. The resulting repulsion (between the nuclei and/or the electrons) that form the plasma of the fire can serve to disperse the plasma, thereby suppressing the fire.

Abstract: An improved apparatus for treating a fire in a multi-floored building where the fire is located on an upper floor vertically displaced from a lower floor from which the fire is treated, and where the upper and lower floors each have a selectively openable environmental access along an external wall of the multi-floored building. The improved apparatus includes a tubular structure having an inlet, an intermediate portion, and an outlet and a bracing system. The bracing system has a frame, a first pivot point, and a second pivot point. The frame provides support against a sturdy surface. The tubular structure is supported on the first pivot point and rotates thereon to elevate or hoist the outlet towards the upper floor environmental access. The tubular structure is further supported on a second pivot point and further rotates thereon to elevate the outlet.

Abstract: The present invention relates to a technique of emitting fire extinguishing sand on an upper surface of a fire extinguishing object such as an assembled battery housed in a rack in a multistage manner by means of gas pressure to extinguish fire. In the present invention, a tip end portion of a flattened nozzle main body 12 is provided with a deflecting plate 16, and by spraying the fire extinguishing sand obliquely downward and letting the fire extinguishing sand bound, the fire extinguishing sand is dispersed on the entire upper surface uniformly.

Abstract: A Robotic Roof Ventilation Apparatus that preforms the process of roof ventilation to protect the lives of firefighters. By keeping the firefighters off the roof of a burning building this robot completely changes the current process of roof ventilation as it provides a reliable way for firefighters to preform roof venation without any risk or loss of life.

Abstract: Disclosed is a fire hose coupling apparatus for self powered lighting of an area where a fire fighter is engaged in fires suppression with a fire hose, and for providing real time environmental data to fire fighters.

Abstract: An extended coverage pendent sprinkler configured for the fire protection of an occupancy classified as any one of: light hazard, ordinary hazard, extra hazard, rack storage with solid shelves and any combination thereof. The sprinkler preferably includes a body having an inlet and an outlet spaced from the inlet to define a passageway to further define a sprinkler axis and a K factor ranging from 11 gpm/(psi)1/2 to about 25 gpm/(psi)1/2. A deflector is spaced from the outlet to distribute a fire fighting fluid over a maximum protection area of about 196 square feet, and having one or more combination of features as described in the preferred deflector described herein.

Abstract: Fire protection device for gangways 3 between the coaches 2 of rail vehicles with a gangway 3 between coaches 2 of a rail vehicle, and a fluid-fed fire-fighting device. Effective fire-fighting with low weight is made due to the fact the fire-fighting device comprises a fluid mist nozzle 4 which delivers a fluid mist, whereby the at least one fluid mist nozzle 4 is arranged in such a way that the fluid mist is sprayed into the gangway 3.

Abstract: A self contained fire extinguisher system that does not need external power in order to sense or initiate a release of a fire suppression medium, includes components configured to utilize a linear sensor network that can be connected to at least one and/or different sources of fire suppression mediums. A linear temperature sensing cord can be routed over a large area not practical with individual sensors. The cord can also actuate several and different sources of fire suppression mediums to maximize the suppression of a fire.

Abstract: A local fire shield is provided for protecting an attachment point of a fireproof system in an engine during a fire event. The local fire shield includes a mounting plate mounted on the attachment point; and a cover coupled to the mounting plate for covering the attachment point during the fire event.

Abstract: A plurality of upstanding bracket assemblies, pipe assemblies, and fasteners are assembled into a plurality of modular fire suppression stations for use in the fire suppression system for a conveyor in an underground mine. Each station includes an upstanding bracket assembly, a fastener, a pipe assembly, and at least one sprinkler head. The fastener attaches the bracket assembly to the conveyor. The pipe assembly is supported by the bracket assembly. The pipe assembly receives water under pressure and directs the water to the sprinkler head. The sprinkler head directs the water onto the conveyor.

Abstract: A system includes a raised floor, a sub-floor space below the raised floor, electrical components in the sub-floor space, and a fire suppression device coupled to the raised floor. The fire suppression device dispenses fire suppression material the electrical components in the sub-floor space.

Abstract: A method for fire-fighting, a rescue boom and a nozzle of a piercing tool. A rescue boom is provided with an elongated piercing tool that can be pushed through a shell of a burning object. A fire extinguishing medium can be conveyed through the piercing tool to a nozzle provided in the piercing tool. The nozzle is provided with orifices arranged such that single jets form a single uniform jet having a flat curtain-like shape.

Abstract: An automated storage system is presented, in which a stacker crane can properly operate even in a high temperature environment, while simplifying the construction of the system facility. The automated storage system includes articles storage racks having a plurality of storage spaces for storing articles; a stacker crane 3 which freely travels along the travelling path, and a ground controller H which is on the ground side to control the operation of the stacker crane, and a fire fighting nozzles 26 on the platform 20. The article storage racks and the stacker crane are located in a high temperature environmental space Z2, while the extinguishant supply source 27 and the ground side controller are in a normal temperature environmental space Z1. A control line 31 is established from the ground side controller and the stacker crane, and a fire fighting hose 30 is from the extinguishant supply source to the fire fighting nozzle.

Abstract: An apparatus, system and method for fire suppression and containment is provided in accordance with one embodiment of the invention. A conduit with a plurality of nozzle connections, in various configurations to create specific fire suppressant discharge patterns. Each conduit can be operated individually or connected to another conduit by a predetermined length of hose forming a contiguous system, traversing large areas of land. The invention and components form a multipurpose fire suppression apparatus. The system can be operated remotely or manually. An alternative embodiment can be installed in residential, commercial and industrial applications. Each system can be custom designed based upon environmental engineering requirements and system application—with regard to conduit diameters, material composition, shape, length and nozzle design without leaving the core design. The system components can also incorporate sensors, monitoring devices, robotics (i.e.

Abstract: Disclosed is a safety ladder for protecting a lineman or firefighter from a flash fire. The ladder has the appearance of a conventional ladder but includes interlocking plates positioned in between the rungs along the rails. Attached to the plates are fluid conduits that allow for the dispensing of a hydrated super absorbent polymer having superior fire suppression to be sprayed over an individual using the ladder should a fire erupt. The mounting plates have spray nozzles attached to the conduit located along the rails of the ladder so as to not infer with normal use of the ladder. A pressurized container of hydrated super absorbent polymer is coupled to the ladder. The hydrated super absorbent polymer is discharged through a solenoid valve which can be operated by the individual using the ladder with a button attached to the ladder or activated by a heat sensor attached to the ladder.

Abstract: A fire retardant delivery system for protection from wildfire is provided. The system includes a retardant tank for storing a fire retardant and a carrier tank for storing a carrier for the fire retardant. Alternatively, the system includes a fire retardant tank fluidly coupled with a carrier provided from a suitable source. The retardant tank and the carrier joined in a tank arrangement. A supply of a motive source is in fluid communication with the tank arrangement. An activation system disperses the supply of the motive source into the tank arrangement so that the fire retardant and the carrier are mixed into a fire retardant and carrier mixture after actuation of the activation system. At least one distribution nozzle delivers the fire retardant and carrier mixture to a desired area.

Abstract: A fire-extinguishing bomb that can be pre-programmed to explode 2-200 feet above the ground or tree line. The bomb employs a laser or barometric altitude sensor in combination with a GPS-altitude sensor for failsafe detonation with extreme accuracy at the proper altitude. The redundant failsafe altitude-dependent detonation system ruptures a container carrying a payload of wet or dry fire retardant/suppressant, preferably dry environmentally-friendly fire-retardant powder having no toxicity and having fertilizer properties. Upon detonation the device coats the ground below with a uniform fire extinguishing coating. The core components of the bomb can be biodegradable, or alternatively can be readily retrieved and reused after each activation, thereby increasing both economy and reducing environmental concerns.

Abstract: A device for suppressing fires generated by lithium-ion batteries exhibiting thermal runaway. The device can include a thermally insulating enclosure for housing one or more battery cells. A fluid delivery system having a heat/temperature sensitive tube passes through each enclosure and contains an agent capable of extinguishing fires. When the cell or battery starts to undergo thermal runaway, the increase in temperature or the eruption of open flame causes the fluid delivery system to rupture inside the enclosure. The agent leaks out of the rupture and is transported into the enclosure and onto the malfunctioning cell or battery. Any fire is suppressed and the cell or battery is cooled down by the agent.

Abstract: An air cleaning system (10) is disclosed comprising a fire protection system. The fire protection system comprises at least one of (i) a spark arrestor (21), (ii) a particle feeder (31), (iii) a fire detection system; and (iv) a fire extinguishing system. A preferred spark arrestor comprises a particle pre-separator (22). A preferred particle pre-separator has a core-and-vane assembly that prevents air traveling through the particle pre-separator from traveling in a straight line.

Abstract: A fireproof system is provided for protecting a structure during a fire event. The system includes a fire resistant panel defining a first attachment opening and disposed adjacent to the structure; a canister including a side wall defining a first end and a second end, and an end wall enclosing the first end and defining a second attachment opening that is aligned with the first attachment opening; a fastener extending through the canister at the second attachment opening and the fire resistant panel at the first attachment opening such that the canister, the fire resistant panel, and the structure are fastened together; and a fire retardant agent disposed within the canister in an inactive condition and configured to transition out of the second end of the canister in an active condition at a predetermined temperature.

Abstract: Abatement of combustion by Li-ion battery is achieved by positioning a mixture comprising a thermally destabilizable solid fluoropolymer and a fluorinated composition with respect to the battery, the positioning being effective to provide the abatement of combustion of the battery, the mixture preferably being a semi-solid and having the proximity to the battery to provide the combustion abatement effect, preferably as a coating on at least a portion of the battery.

Abstract: A fire detection system includes a detection tube and a sensing device. The detection tube contains a sensing fluid having a first physical condition and a second physical condition. The sensing fluid is in the first physical condition below a temperature threshold, and is in the second physical condition above the temperature threshold. The sensing fluid is at least partially liquid in the first physical condition. The sensing device is movable to open in response to a transition of a portion of the sensing fluid from the first physical condition to the second physical condition.

Abstract: Stovetop fires are among the more prevalent of resident fire hazards and smoke detectors are among the most prevalent and economical forms of residential fire alarms. Automatic stovetop fire extinguishers can prevent property damage and even personal injury; however, these stovetop fire extinguishers may also limit smoke emissions and the subsequent detection of smoke. While an initial fire may be efficiently subdued by an automatic stovetop fire extinguisher, it is often desirable to alert present and future occupants of a fire hazardous condition. A sound based fire alarm system and method are described herein, which detects a sound burst emitted upon deployment of an automatic stovetop fire extinguisher and triggers a continuous fire alarm to alert occupants of a potentially fire hazardous condition. Alarm signals can be audible, visual, or both. The system may be a stand alone system and use battery power for affordability and ease of installation.

Abstract: A device for suppressing fire inside a container includes a support structure configured to be mounted inside a vehicle at a position associated with at least one location configured to receive a container. The device further includes a deployment structure coupled to the support structure and a penetrator assembly coupled to the deployment structure. The penetrator assembly includes a nozzle having a tip configured to pierce a container and an actuator associated with the nozzle. The actuator is configured to extend the tip of the nozzle such that it pierces a container. The support structure and the deployment structure are configured such that the penetrator assembly is movable in at least one plane with respect to the support structure, and the penetrator assembly is configured to receive fire suppressant and direct the fire suppressant into the container.

Abstract: A nozzle assembly includes a nozzle body with an inlet, an outlet, and a passageway extending from the inlet to the outlet, and with the passageway having a flow area and a fixed diameter at the outlet. A lever is supported at the nozzle body, and the nozzle assembly further includes an actuator, which is supported by the nozzle body and configured for varying the cross-section of the flow area through the outlet in response to the lever being moved relative to the nozzle body.

Abstract: In a method or in a device for fighting or preventing fires in the interior, on the surface, or in the surroundings of an electrochemical energy store, a unit is provided which ensures that the concentration of an inert gas or of a mixture of inert gases in the interior, on the surface, or in the surroundings of the electrochemical energy store does not fall below a predetermined value.

Abstract: Methods and apparatus for a dual stage hazard suppression system according to various aspects of the present invention include a housing containing a first hazard control material that is configured to be located close to a hazard source and a container containing a second hazard control material located at a distance from the hazard source. The housing may be configured to release the first hazard control material in response to a breach of the housing and/or the hazard source. The container may be configured for a timed release of the second hazard control material in response to the release of the first hazard control material. Alternatively, a sensor may be used to trigger the release of the second hazard control material in response to a triggering event separate from the initial breach of the housing and/or the hazard source.

Abstract: The present disclosure provides a bun fire suppression system that includes a wand, a valve, and a hose. The wand is configured to pierce into a foam bun. The wand further includes a plurality of holes extending from the hollow portion inside the wand to the exterior of the wand. The valve is coupled to the wand and is in fluid communication with the hollow portion of the wand. The valve includes a shut-off that selectively stops and releases water flow from the valve to the hollow portion of the wand. The hose is coupled to a water source to direct water to the wand.

Abstract: Example embodiments provide a device for protecting an inner space of an object against fire, including a housing provided with at least one passage opening; an aerosol-forming extinguishing element arranged in the housing and which may include a container for holding extinguishing material which can be activated at a fixed activating temperature; at least one outlet opening which can be connected to the passage opening in the housing and along which the activated extinguishing material can be carried into the inner space of the object so as to extinguish the fire; an activating element for bringing at least part of the extinguishing material to the activation temperature; at least one detection unit arranged in or close to the housing for detecting at least one physical and/or chemical parameter representative of fire in the inner space; and a control unit arranged in the housing for causing thermal activation of the extinguishing element by the activating element when a preset activation value of the detect