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Concrete >> Covermeters/Rebar Locators
James Instruments, Inc. : Mini R-Meter
Digital rebar locator


James Instruments, Inc. Mini R-Meter

A rugged hand held field instrument for finding the location, depth and size of reinforcement rebar, post tension, copper and conduit in place.

The Mini R-Meter is a rugged digital hand-held field instrument for finding the location and depth of reinforcement bars in place.

The Mini R-Meter is light weight, inexpensive and an easy to use unit to locate rebar. Rebar detection of up to 10" (250mm) can be accomplished when locating large diameter rebar. An easy to read display and a 4 hr battery life are just a few advantages that make the R-Meter one of the most advanced hand held units in the field today. The sensor design allows the user to quickly and accurately locate and determine concrete cover in corners or hard to reach areas. The system allows the user to select between Imperial and Metric units and the data can be saved in the instrument for posterior uploading to a computer. The data is saved in the system with the date and time of the record, to help identify prior tests taken. The Mini R-Meter rebar locator is also capable of locating non-ferrous metals.

The eddy current sensor was specifically designed to react with the presence of currents on the outer surface of metal objects. It is uninfluenced by small metal particles in the concrete, whether the concrete is fresh or hardened, wet or dry. The eddy current sensor also allows the unit to locate both ferrous as well as non ferrous metals in concrete; thereby finding not only steel reinforcing bars accurately, but also tendons, copper tubing, conduit and more.

The latest in microprocessor technology not only conditions the signal from the sensor for more accurate and dependable results, but also provides the user with the information they need.

Built-in memory can store over 150 individual data points for later processing.

Detection and Orientation of Rebar
The exact position and orientation of rebar can be measured quickly and accurately. Rebar-free can be identified for coring, grinding, resurfacing or insertion of new machinery mountings.

The instrument can be used to inspect new structures for compliance with specifications as well as old structures under modification.

Measurement of Concrete Cover
The exact position and orientation of rebar can be measured quickly and accurately. Knowing the size of rebar, concrete cover can be detected and the distance between concrete and the surface will appear in the easy to read display.

Location of Metals
Locate any metals such as pipes, flues, wire adn sheets imbedded in concrete, masonry or wood. Identification is possible to a depth of 10 inches.

Location of Pre-Stressed Cables
Locates the position of cables and lost tendon splices in pre or post tension concrete products.

Features & Benefits:

  • Eddy current design for greater accuracy
  • Single sensor for all depth ranges
  • Daylight visible display
  • Locates up to 10" (250mm)
  • Economical
  • Store Data for Later Upload via USB


Operating temoerature range: -5 C to 45 C (23 deg F to 113 deg F)
Bar Size Calibration: 3/8" to 1 3/8"
Max. Detection Range: 10" (No. 11 Bar) 250 mm (36 mm Bar)
Power Source: 2 AA batteries
Battery Life: 4 hours continuous operation
Software: Windows Compatible/ USB Required
Operating Weight: Less than 3.5 pounds (1.60 kg)



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