I attached a Sensor Array and an Imp. Signal Interpreter and on the next turn I got the I Spy achievement (Use an Imp. Sensor Array (or better) with Imp. Signal Interpreter (or better).). My Sensor Array wasn't the Improved version.
Yep, good catch, those achievements were implemented back before the beta versions in which the ranges were shortened, making it easier to get them than the listed descriptions. Will have to update the internal checking (since in order to make it faster I hard-coded them to the values, even though those ended up changing in the stats :P).