EXPRAY Field Test Kit

The EXPRAY field test kit is a portable assembly of chemical reagents and test materials enabling rapid on-site identification of explosive residues or compounds at crime scenes or security checkpoints. The field test approach provides mobile screening capability eliminating requirement for laboratory analysis during preliminary threat assessment.

The EXPRAY kit architecture includes multiple colour-change test reagents targeting diverse explosive types. Chemical tests employ colour-change reactions identifying specific explosive compounds (TNT, RDX, PETN, C-4, SEMTEX, dynamite). Test strips enable rapid visual assessment within 30–60 seconds without requiring instrumentation or training. Sampling swabs collect residual explosive particles from surfaces, clothing, vehicles, or containers. Instruction cards guide operators through test procedures enabling minimally-trained personnel reliable results.

Test methodologies span colorimetric reactions producing distinct colour changes indicating explosive presence, precipitation reactions forming observable crystals confirming specific compounds, and oxidation reactions generating characteristic colour transitions. Each methodology addresses specific explosive types and sensitivity requirements.

Operational procedures involve swabbing suspect surface or material, inserting swab into test reagent container, observing colour change within specified time (typically 30–120 seconds), and comparing results against reference colour chart. Positive results trigger enforcement activation and confirmatory laboratory testing.

Limitations include false positive results from legitimate compounds (fertilisers, cleaners, cosmetics) requiring confirmatory testing, sensitivity variation across explosive types, and reagent shelf-life requiring periodic replacement. Training emphasises proper procedure following preventing invalid results.

In Pakistan, EXPRAY kits support law enforcement and security operations.

Tactical Supply Pakistan supplies EXPRAY field test kits for explosive screening and threat identification applications.