The main function of this device is to calibrate, verify, and check whether the rebar detector is accurate, stable, and reliable. It is also an indispensable standard reference for the daily testing, factory calibration, and rapid on-site inspection of rebar detectors.

Rebar test block

Model:WJJHA-1

I. Product Introduction

The rebar cover thickness measuring instrument is a portable non-destructive testing instrument used for inspecting the construction quality of reinforced concrete structures.It can determine the location of rebar on the concrete surface,as well as the thickness and diameter of the rebar cover.Furthermore,it can also detect the location of magnetic and conductive materials within the concrete structure,such as cables and plumbing pipes inside walls.Pre-construction detection can prevent damage to these facilities during construction,reducing the risk of accidents.

The product complies with the requirements for rebar cover thickness measuring instruments in the"Code for Acceptance of Construction Quality of Concrete Structures"GB 50204-2002 and references the standard BS 1881-204"Testing concrete-Recommendations on the use of electromagnetic covermeters".

II. Product Features

1.Utilizes single-direct detection of protective layer thickness(with known diameter),resulting in more accurate data.

2.Estimates rebar diameter and protective layer thickness.

3.Dual-range operating mode ensures detection accuracy and large detection range.

4.Fast testing speed,high accuracy,and large data storage capacity.

5.Features fully automatic calibration.

6.Offers storage,viewing,and deletion functions for test data.

7.Features a large 160×128 screen for enhanced clarity.

8.Backlit display screen ensures clear visibility even in low light conditions.

9.Employs dual data transmission via RS-232 and USB.

10.Powerful analysis software provides comprehensive post-processing and report generation services.

III. Technical Parameters

1. Rebar Diameter Range: Ф6mm～Ф50mm (15 models available)

2. Commonly Used Rebar Diameter Grades: Ф6, Ф8, Ф10, Ф12, Ф14, Ф16, Ф18, Ф20, Ф22, Ф25, Ф28, Ф32, Ф36, Ф40, and Ф50

3. Protective Layer Thickness Measurement Range: Range: 6mm～90mm; Range: 7mm～190mm;

4. Protective Layer Thickness Measurement Range (Unit: mm) Diameter 6 8 10 12 14 16 18 20 22 25 28 32 36 40 50

Minimum Value 6 6 8 8 8 8 8 10 10 12 12 12 17 17 17

Maximum Z value: 70 70 70 80 80 80 80 85 85 90 90 90 90 100 100

5. Measurement Range of Protective Layer Thickness (Unit: mm) Diameter: 6 8 10 12 14 16 18 20 22 25 28 32 36 40 50

Minimum Z value: 7 10 12 12 14 16 16 18 18 20 20 22 25 25 25

Maximum Z value: 85 100 120 130 130 140 140 160 160 160 180 180 180 190 190

6. Maximum permissible error of the instrument (protective layer thickness, unit: mm)

7. Diameter measurement range: 8-50mm; diameter test error ≤ ±1 specification (correct specification).

8. Battery: 6 AA alkaline batteries, power supply time greater than 30 hours.