EM tech also does not increase the active emissions, potentially making a high-EM-tech sensor more difficult to detect for passive EM sensors. Not that it matters for a size 50 sensor.
Anyway, I am curious: Why resolution 1? A range of 88m km is not that much - certainly there are missile designs with a longer range that this.
Resolution 1 is usually used for AMM sensors, but that would seem over the top. Yes you could spot incoming missiles from 10m km away, but what is the net effect of that? You can fire at the same incoming salvo with your AMM launchers more often, which of course is nice. But on the other hand the same could be achieved with more AMM launchers, which would very likely be cheaper. A size-1 launcher is just 1 HS, so if you used a size-10 (AMM range of 2m km) sensor instead, you could also have 40 more AMM launchers. This would likely be cheaper and more effective in an AMM role.
On the other hand, if the sensor is intended to spot hostile ships, the resolution could be increased quite a bit. Even a small fighter is unlikely to be smaller than 200t=4HS. So if you used a resolution-4 sensor you could extend your range to 350m km. And this would really be a very usefull range to spot any ship before it moves into range. And, as a sitenote, this sensor could still spot missiles at 2m km, which is a workable AMM range...