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Digital Concrete Rebound Test Hammer for On-Site Assessment
Keywords: AMT156 digital Schmidt hammer, digital concrete test hammer, concrete rebound hammer, digital concrete rebound tester, concrete rebound test instrument
The AMT156 digital concrete test hammer is designed for on-site, nondestructive rebound testing of hardened concrete. It combines a mechanical impact hammer with a digital display and automatic data recording to help inspectors collect rebound readings efficiently. Rebound testing is used to assess concrete uniformity and estimate compressive strength when applied under the appropriate test method; it does not directly measure compressive strength.
1. Wireless integrated design combines the test hammer and display in a portable unit.
2. Automatic recording helps streamline concrete rebound testing and field data collection.
3. English OLED interface with 128 × 64 display resolution and three adjustable backlight levels.
4. Sensitive touch keys provide responsive instrument operation.
5. Non-contact reflection grating sensor reduces mechanical wear while retaining the conventional pointer scale for reference.
6. Built-in rechargeable lithium battery supports more than 10 hours of continuous operation.
7. On-board memory stores up to 200 standard components, with 50 test areas per component.
8. USB 2.0 interface supports data communication with a computer; the product information describes USB storage-style transfer without a dedicated driver.
9. Test parameters can be entered at the test site; a real-time clock can record test dates.
10. Low-power functions include adjustable backlighting, auto-sleep, and automatic power-off.
Carrying case and accessories | 
Digital display and control buttons | 
Rebound scale and conversion curves |
| Parameter | Specification |
|---|---|
| Data-processing standard | JGJ/T 23-2011; the source also references ASTM C805 and EN 12504 |
| Standard impact energy | 2.207 J |
| Tension spring stiffness | 785 N/m |
| Impact hammer stroke | 75 mm |
| Test-anvil calibration value | 80 ± 2 |
| Display-to-pointer difference | ≤ ±0.5 (difference between digital display and mechanical pointer readings) |
| Display | OLED, English interface; 128 × 64 resolution; three adjustable backlight levels |
| Data storage | Up to 200 standard components; 50 test areas per component |
| Continuous operating time | More than 10 hours |
| Power consumption | Approximately 200 mA at maximum backlight |
| Sleep current | 0.8 mA |
| Computer communication | USB 2.0 |
| Net weight | Approximately 1.1 kg |
1. Use the AMT156 digital Schmidt hammer for in-place rebound testing during construction inspection and concrete assessment. Testing should follow the applicable project method and local requirements. The source lists JGJ/T 23-2011 and also references ASTM C805 and EN 12504; confirm the applicable edition and part for the project.