9846-1
Ultrasonic Sensor is LEGO set 9846-1. It has a score of 77. This is average compared to all other sets. The set is recommended by 0 reviews, based on 2 scored reviews and 2 reviews total. It is ranked in the bottom 34.01% scored sets on Brick Insights. We know this set was released in 2006, and it is categorised in Mindstorms.
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this is a great sensor for measureing distance (duh). It is very useful when making robots that drive around on thier own so they dont run into anything. but it does have some bugs. it does not get great readings from anything soft and it rarely detects things like chair legs etc. that are real thin. but all in all a great adition to the lego Mindstorms kit!