Dynoscanner
A dynoscanner was a sensor device used to detect low-level molecular activity. 

In 2285, while scanning Ceti Alpha V in conjunction with Project Genesis, the  detected a minor energy flux reading on one of the ship's dynoscanners, leading the crew to believe that the scanner was out of adjustment, that it contained life, or that a particle of preanimate matter was caught in the matrix. ()

While attempting to pinpoint a chlorinide leak in the cargo bay of the  in 2368, Geordi La Forge suggested the use of a dynoscanner, rather than a tricorder, because the tricorder was not picking up what it was they were seeking. ()

it:Dynoscanner
Sensor technology