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The subject of this article appeared in Call of Duty: Black Ops II. The subject of this article appeared in Call of Duty: Black Ops III.
For a similar weapon, see Threat Grenade.

"Detects enemy soldiers within line of sight"
Create-A-Class Description.

The Sensor Grenade is a Tactical Grenade featured in Call of Duty: Black Ops II. They work similarly to grenades under the effect of the Recon perk and the Portable Radar Tactical equipment from Call of Duty: Modern Warfare 3. However, players with Cold Blooded cannot be detected by this grenade, although players with Cold Blooded will still be traced with the red laser. If the grenade doesn't detect an enemy player it will self destruct and do 15 damage to a player if they run close to it as it explodes. Also, the impact damage is also 15 so if a sensor grenade both hits and explodes on a player, it will deal 30 damage, which is able to kill in Hardcore modes.

The self-destruct sequence can destroy other lethal equipment as well. If the grenade detects a player, it will refrain from self destruction for a small period of time while beeping and tracing each enemy with a red laser. Be aware that the grenade does not show enemies in real time, but if the player is hit by it when it self destructs, it will appear as a red triangle in real time (much like a VSAT), for around five seconds, resembling the effect of Recon.

Call of Duty: Black Ops III

The Sensor Grenade is unusable, however it appears in the Campaign safehouse on the Armory grenade rack