DZL-4000 concrete resistivity tester for assessing corrosion risk of steel reinforcement; lower resistivity means higher corrosion risk.
Overview
The DZL-4000 DZL-4000 Concrete Resistivity Tester, also called a potential detector (corrosion analyzer), evaluates rebar corrosion. Corrosion of steel in concrete is an electrochemical process that generates current causing metal dissociation; the lower the resistivity, the easier corrosion current flows through concrete and the greater the corrosion probability. Measuring concrete resistivity effectively assesses corrosion resistance and existing rebar corrosion degree. It measures surface resistivity to detect rebar corrosion using a 50mm-spacing Wenner array electrode, powered by five AA batteries for up to 12 hours. It features sponge sensors for good contact, a large color LCD, rechargeable long-life battery, data hold and continuous recording, an attached mini printer for direct output, and a portable carrying case.
Applications
• Concrete cube and cylinder compressive strength testing
• Reinforced concrete structural component assessment
• Precast concrete factory quality control
• Construction site and laboratory concrete acceptance testing
Features
• Large LCD display showing real-time test parameters and results
• Built-in thermal printer for immediate test record output
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Range | 0–2000kΩ·cm |
| Resolution | 0.1kΩ·cm |
| Accuracy | ±1kΩ·cm |
| Host dimensions | 205×100×35mm |
| Weight | 396g (host incl. battery) |
| Electrode | Wenner array, standard spacing 50mm |
| Power | 5×AA batteries, approx. 12h continuous |
Standards
GB/T 50081, ASTM C39, JGJ/T 384
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the DZL-4000 Concrete Resistivity Tester comply with?
A1: The DZL-4000 Concrete Resistivity Tester is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the DZL-4000 Concrete Resistivity Tester be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
Overview
The DZL-4000 DZL-4000 Concrete Resistivity Tester, also called a potential detector (corrosion analyzer), evaluates rebar corrosion. Corrosion of steel in concrete is an electrochemical process that generates current causing metal dissociation; the lower the resistivity, the easier corrosion current flows through concrete and the greater the corrosion probability. Measuring concrete resistivity effectively assesses corrosion resistance and existing rebar corrosion degree. It measures surface resistivity to detect rebar corrosion using a 50mm-spacing Wenner array electrode, powered by five AA batteries for up to 12 hours. It features sponge sensors for good contact, a large color LCD, rechargeable long-life battery, data hold and continuous recording, an attached mini printer for direct output, and a portable carrying case.
Applications
• Concrete cube and cylinder compressive strength testing
• Reinforced concrete structural component assessment
• Precast concrete factory quality control
• Construction site and laboratory concrete acceptance testing
Features
• Large LCD display showing real-time test parameters and results
• Built-in thermal printer for immediate test record output
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Range | 0–2000kΩ·cm |
| Resolution | 0.1kΩ·cm |
| Accuracy | ±1kΩ·cm |
| Host dimensions | 205×100×35mm |
| Weight | 396g (host incl. battery) |
| Electrode | Wenner array, standard spacing 50mm |
| Power | 5×AA batteries, approx. 12h continuous |
Standards
GB/T 50081, ASTM C39, JGJ/T 384
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the DZL-4000 Concrete Resistivity Tester comply with?
A1: The DZL-4000 Concrete Resistivity Tester is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the DZL-4000 Concrete Resistivity Tester be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
