Available water/trans/oil temperature senders fitting sizes.
SEN-04-1 - 1/8" NPT
SEN-04-2 - 3/8" NPT (includes bushing)
SEN-04-4 - 1/2" NPT
140022    -  1/8" NPT with 1/4", 3/8" and 1/2" NPT Bushings

SEN-04-5 - 1/8" NPT with harness (recommended for BIM-04-2, RTX, VHX, HDX and VFD systems with plastic control box), 

Range: 0-300°F ( 0-150°C )
Resolution: 1°F ( 1°C )