Durability test apparatus

Dgitial resistivility 4 probe Array Meter

SR-4000  Digital resistivity 4 probe array meter

For assessing the possible rate of corrosion in reinforcing bars. The time at which corrosion of steel may commence and the rate at which it may proceed is dependent upon properties of the cement paste and the permeability of the concrete. Since the electrical conductivity of concrete is an electrolytic process, which takes place by ionic movement in the aqueous pore solution of the cement matrix, it follows that a highly permeable concrete will have a high conductivity and low electrical resistance.

Thus knowledge of the electrical resistance of a concrete can provide a measure of the possible rate of corrosion of steel embedded in it.

TECHNICAL PARAMETERS

Measurement range: 0-2000 KΩ
Measure accuracy: 1 KΩ
Display stability: ±1 KΩ
Display mode: LCD panel
Input resistance: 100 MΩ
Keep function: Reading keep function
Battery operated: 12v, approximately 4-6 hours active operating time
Operation temperature: -10℃～50℃
Dimension: 185×85×45mm

Configuration List

Controller
Wenner 4-probe array
Sponge plug
Cable used for connecting controller and wenner 4-probe array
Calibration Clock
Conductive solution