Determining Bar Size - James Rebarscope R-C-400 Operator's Manual

Determining Bar Size

The bar diameter can be easily determined with the Rebarscope®
without the prior knowledge of cover. This is possible by taking two
readings, one at surface of the structure and another at the same
location but 3/8 inches away. A 3/8 inch spacer block is provided
with the system along with a locating template. This L shaped
template helps keep the exact location of the first reading when
taking the second reading with the 3/8 inch spacer block (see
pictures below).
(Note: Bar sizing is done in Deep mode only, and at a maximum
depth of approximately 4.5 inches.)
Figure 11: Locating Rebar
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