What is a Pachometer used for?

noun. Any of various instruments used to measure thickness, originally of the glass of mirrors, but later also of paper, concrete, etc.; (Ophthalmology) an instrument for measuring the thickness of the cornea of the eye, typically using either light from a slit lamp or ultrasound.

What is rebar locator?

Rebar locators are used to find the position of steel reinforcement bars in concrete structures and to measure their concrete cover. Certain type of reinforcement such as glass fibre rebar, post-tension or pretension strand will require a Ground Penetrating Radar systems to locate correctly.