According to the prescribed specifications, the NLJD should be capable

According to the prescribed specifications, the NLJD should be capable of detecting ABCD circuit buried under dry soil up to a depth of at least

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12 inches

18 inches

24 inches

36 inches

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UPSC CISF-AC-EXE – 2020

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Technical specifications for security equipment like NLJDs, particularly in regulated environments like airports or security forces, often prescribe minimum performance standards. While the exact standard referenced here requires specific documentation (likely from BCAS or procurement guidelines), detecting electronic components like ABCD circuits (possibly referring to standard electronic logic circuits used in timers or triggers) buried under dry soil is a typical application for NLJDs in search operations. A depth of at least 12 inches (approximately 30 cm) is a plausible minimum requirement for such detection capabilities in certain operational contexts. Without access to the specific official specification, it is difficult to confirm definitively, but 12 inches fits within the expected performance range for such equipment detecting small buried targets.

NLJDs are used for detecting buried or concealed electronic components. Performance specifications include detection depth.

The effective detection depth of an NLJD depends on various factors, including the power of the transmitter, the sensitivity of the receiver, the size and orientation of the target non-linear junction, and the composition and moisture content of the medium (soil, walls, etc.) it is searching through. Dry soil generally allows for better penetration compared to wet or highly conductive soil.

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