An optical sensing element for use in the detection of hydrogen peroxide includes a sensing compound provided as a coating on a substrate. The sensing compound, on exposure to hydrogen peroxide, forms a luminescent reporter compound when excited with stimulating radiation at a predetermined wavelength that the sensing compound does not absorb.

A remote detector detects the presence of dielectric materials, including energetic materials. The remote detector includes a center beam secured in a pivot mount, at least one collector secured to the center beam at a proximal end via the pivot mount, and an analog matching filter coupled with the center beam via a circuit. The analog matching filter contains a replicate matching material configured to match a dipole field of a target material. In the presence of a target material, the replicate matching material causes displacement of the center beam via a dielectrokinesis (phoresis) force.

An inspection portal includes a first x-ray source configured to emit a first beam, a first backscatter detector configured to detect backscatter from the first beam, a second x-ray source configured to emit a second beam, a second backscatter detector configured to detect backscatter from the second beam, and at least one first collimator and at least one second collimator, each oriented to detect backscatter from the associated beam and to block scatter from the other beam. The first and second backscatter detectors are configured to weight signals acquired using each of their detector element based on the first and second beams. The first backscatter detector is configured to use signal processing techniques to mitigate crosstalk due to scatter from the second beam, and the second backscatter detector is configured to use the signal processing techniques to mitigate crosstalk due to scatter from the first beam.

A minimum-ignition-energy testing apparatus includes a combustion tube and a bottom assembly coupled to a lower end of the combustion tube. A top assembly is coupled to an upper end of the combustion tube. The top assembly includes a first sparge plate coupled to the top base plate. The first sparge plate has a first aperture formed therein. The top assembly also includes a second sparge plate coupled to the first sparge plate. The second sparge plate has formed therein a second aperture that aligns in registry with the first aperture. A channel is formed in the second sparge plate about a perimeter of the third aperture. The channel has a plurality of holes disposed therein that are formed through a thickness of the second sparge plate. A tube is formed through in the second sparge plate, the tube fluidly coupling the channel to a gas source.

An apparatus for forming an anchor to connect a fiber to an explosive charge wall includes an anchor insert tab disposed on the interior side of the wall, a top plate disposed on the exterior side of the wall, an ST connector disposed on the exterior side and attached to the top plate to position the ST connector at the fiber insert wall opening for receiving the fiber, a plurality of zip ties extending through the anchor insert tab, the wall, and the top plate, and a plurality of locking members one for each of the zip ties. The zip ties each have a locking head disposed on the interior side of the wall to press the anchor insert tab against the interior wall surface. The locking members are engaged with the zip ties to press the top plate against the exterior wall surface to form the anchor.

Devices and methods are employed to detect substances in a medium. The device comprises an electrogenic bacterium that selectively interacts with a substance to produce electrons. A portion of the electrons provides power to the device and a portion of the electrons generates a signal as an indication of the presence of a substance in the medium. The method comprises contacting the electrogenic bacterium of the device with a medium suspected of containing the substance and measuring the signal generated by the electrons.

Embodiments of the present specification provide methods and systems for sensitivity traps that contain a polymer matrix made from an inert polymer material for encapsulation of trace amounts of explosives and narcotics and a suitable plasticizer material, the types and ratios of which may be selected based on type of analyte that is to be used with the sensitivity trap. The plasticizer material functions by breaking up intra and inter-molecular polymer chain interactions resulting in a larger diffusion coefficient of the analyte within the polymer matrix. Therefore, in embodiments, sufficient amounts of plasticizers are added to the sensitivity trap, which also reduces a glass transition temperature of the polymer matrix and the trap.

The present disclosure provides a gate system for sample detection and a method of sample inspection, which relate to the field of detection and analysis technology. The gate system comprises: an accommodating apparatus configured to accommodate an inserted ticket to be detected; a wipe sampling apparatus including a wipe sampling belt which is configured to drive the ticket to be detected to move within the accommodating apparatus and to conduct a wipe sampling to the ticket; an inspiratory sampling apparatus configured to collect samples dropped from the wipe sampling apparatus; and a detection apparatus configured to detect the samples and output detection results. The gate system for sample detection and the method of sample inspection provided by the present disclosure have a wide range of applications and can perform rapid sampling and detection to those substances that are difficult to be volatilized.

An inspection tester for testing a surface for suspected explosive substances includes a body unit, a breakable ampoule carried by the body unit, and an ionic explosive detecting reagent in the breakable ampoule wherein the body unit and the breakable ampoule are positioned to deliver the ionic explosive detecting reagent to the surface for testing the surface for the suspected explosive substances. The ionic explosive detecting reagent is a salt in a liquid state.

A shaped lens for minimizing differences in time of arrival at the output surface of an explosive assembly. The lens is plano-convex with the convex shape oriented towards the explosive charge. The lens becomes monotonically thicker as the center of the lens is radially approached from the edge, according to a formula accounting for the detonation velocity of the explosive and velocity of the shockwave through the lens. The lens is preferably incorporated into a test fixture using a liquid explosive, such as nitromethane. The test fixture may be assembled on site, at the test location.