Pipe Diameter and Thickness Gauge Transducer Guide

The table outlines the transducer contact diameter and the minimum tubular diameter which can be normally measured relative to the transducer type.

Probe Types
Contact Diameter
Minimum Pipe Diameter
DP-104 / DA-0.8G 1.250" / 31.8mm 12" / 304mm
DM-401 / 411 0.700" / 17.8mm 6" / 152mm
DA-303 / 403 0.635" / 16.2mm 5" / 127mm
KBA-560 0.625" / 15.9mm 5" / 127mm
HT-400 / 400A 0.500" / 12.7mm 2" / 50mm
DA-301 / 401 / 451 0.475" / 12.1mm 1" / 25mm
FH2E 0.380" / 9.6mm 1" / 25mm
DA-312 / 412 / 465 0.300" / 7.6mm 0.75" / 20mm
KBA-525 0.200" / 5mm 0.75" /20mm
DA312B16 / B29 0.120" / 3mm 0.70" / 15mm