Measurement of concrete surface resistivity has proven to be an efficient & cost effective non-destructive testing method to evaluate state of corrosion, chloride diffusion rate and permeability in concrete samples. The PT411 is a handheld instrument for accurate measurement of concrete surface resistivity using the Wenner 4 electrode method. The PT411 is comprised of a four contact probe equipped with spring loaded stainless steel pins and an electronic processing & display module. The PT411 probe is available in 38 mm & 50 mm contact spacing versions to match current penetration depth requirements in different applications. Generally larger contact spacing leads to more reasonable results in inhomogeneous materials like concrete. The 38 mm probe complies with
AASHTO TP 95-11 standard to evaluate chloride ion penetration..
Applications
| Parameter | Range |
| Resistivity Measurement Range | 1 Ohm.cm … 1 MOhm.cm |
| Operation Ranges | Low Range: (0… 500 Ohm.cm) High Range: (0… 1 MOhm.cm) |
| Measurement Accuracy | %1 (0… 500 Ohm.cm) %1 (0… 1 MOhm.cm) |
| Range Switching | Automatic |
| Measurement Method | Constant Current AC excitation |
| Excitation Frequency | 40Hz |
| Temperature Measurement and Compensation range | 0… 50 °C |
| Temperature Operating range | 0… 50 °C |
| Power Supply | External DC Adaptor, 5V- 1A |
| IP Class | IP 54 |
| Display | 4.3” Color LCD, 480 x 272 pixels |
| Dimensions | 22.8cm X 15.1 cm X 5cm |
| Weight | 500 gr. |
Features