Proximity Sensor

The DSU-33D/B Proximity Sensor is an all-weather, battery-operated, active, radio-frequency, ranging radar. It is a single-mission device capable of operating in an electronic countermeasure environment (ECM).
The sensor mounts on and provides a proximity function for the MK 80 and M117 series general purpose. The sensor is capable of both high- and low-drag releases, and it meets the unique requirements of the U.S. Air Force and Navy.
For the Air Force and Navy are equipped with an FMU-139C/B or FMU-152A/B fuze, an FZU-48/B, FZU-55/B or FZU-63/B and a filtered power-cable assembly. Mix-and-match combinations of fuze, sensor and initiator provide the lowest-cost alternative to fuze/sensor in one hardware package.
Provisions for both ground and in-flight safety are incorporated as integral design features to ensure that the sensor will operate the fuze only under specific and selected conditions. The DSU-33D/B has passed appropriate environmental tests.
The sensor features advanced electronics technology, solid-state circuit design and highly reliable parts. It is subjected to extensive testing during all production stages.
In terms of accuracy, the DSU-33D/B allows for multiple drop configurations. The sensor-processor signal returns from the weapon release all the way to the ground. When jamming occurs, the ground signal overcomes the jamming signal and initiates an above-ground burst, and when no jamming is present, the sensor provides a very accurate height of burst.
Orbital ATK has delivered over 154,000 DSU-33 series Sensors since 1999. The DSU-33D/B is currently in production for the U.S. Government under a new Full Rate Production Contract, Orbital ATK�s fourth.�