Unit (pressure)
A unit was an unspecified measurement of molecular pressure.

While attempting to produce liquid trellium-D aboard  in 2153, the molecular pressure during the "cooking" process was up to 1100 units when it began to show signs of instability. 

After attempting to decrease the theta bombardment by seven percent, it continued to rise from 1400 units to 1430, before the radiation was discontinued altogether. An attempt to introduce a burst of delta radiation at eighty percent brought the pressure up to  2000 units before the container exploded. ()

Measurements