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The dedicated energy receptor (DER) was a passive sensory device capable of detecting electromagnetic emissions in its surroundings. Using it, a skilled operator would be able to detect emissions from lasers, beacons and comlink transmissions. A DER concentrated its scanning in a narrow, focused beam and is intended to gather detailed, specific information on a previously detected target. Because of its narrow focus, a DER was of little use in early threat detection.

DERs were commonly found in the sensor suites of most military starships, including Rebel Alliance starfighters and Imperial Star Destroyers.

Dr. Lucien wished to install them in infiltration droids.

Imperial Torpedo Spheres utilized thousands of DER devices to find and target weak spots in a planetary shield, by tracking down anomalies and fluctuations in the shields.

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