Gap probe / capacitive / rugged / industrial
2HPB, 2HPS series
The 2HPB series is a unit manufactured by Capacitec company. It was manufactured in custom lengths up to 18" (500mm).
Further, the unit has a choosing a matching sensor such as an HPS 4 with a range of 0.079” (2mm) and embedding one sensor on top and one on the bottom would have a useable range of 0.157” to 0.236” (4 to 6mm) independent of the probe position in the gap.
The wands were assembled through the thin versions of Model HPB.