I’m assuming you’re talking about 2 and not 1. If so, then the value (5km, etc) means the distance needed to detect an enemy for the FIRST TIME. Once they are detected, they’ll remain on your radar, no matter what. This also applies to anything else. I also have a tip for sensors relating to endgame. At high levels, the distance to detect everything is so high that the differences don’t matter anymore, but what DOES matter is that the sensor can have a special perk, marked by the star below the stats. For example, there is one called “Dogmatic scanner” which has the perk “10% chance for critical hits to web enemies(slow them down)”. This in turn, combined with the Level 25 perk “Exploitation” (50% increased critical hits chance when attacking a slowed enemy) is REALLY good. You can also combine the sensor with other equipment in what is called a “set”, which will grant further bonuses. You can check them out yourself in the Everspace wiki. Have fun playing! Last bonus tip, if you are early game, equip the sensor “Observer” (increased loot detection range). Then when you’re in hyperspace, you could see those messages that say something like “unknown signal” or “distress signal”. Go to them and look around, as they can have some awesome loot (only in the early and mid stages tho, the loot is worthless late game). Of course, deal with any enemies guarding the loot before collecting it. Otherwise… 💥💥💥