Merlin Bulk Conductivity Tester

Merlin is used to measure the bulk electrical conductivity, or its inverse, the bulk electrical resistivity, of saturated 100 mm diameter concrete cylinders or cores with lengths up to 200 mm. The test is simple to perform and a measurement is obtained within two seconds. The conductivity of a saturated concrete specimen provides information on the resistance of the concrete to penetration of ionic species by diffusion. The term bulk is used to indicate that the measurement is made through the specimen as opposed to a surface-based measurement.

Merlin can be used for the following purposes:

Research and development to characterize the influence of new materials on the electrical conductivity of concrete.
Optimizing mixture proportions and blends of supplementary cementitious materials to increase concrete service life.
On-site quality control and quality assurance.
Evaluation of in-place concrete (using cores).