Atomfair-DRH-638 Integral Digital Rebound Hammer
Atomfair – Professional Integral Digital Rebound Hammer for Concrete Strength Testing
Product Overview
The Atomfair-DRH-638 Integral Digital Rebound Hammer is a high-precision, portable testing instrument designed for on-site detection of concrete compressive strength. With its integrated structural design, advanced photoelectric sensing technology, and user-friendly operation interface, it provides accurate and reliable test results efficiently, making it an essential tool for quality inspection in various construction projects.
Key Features
- Integrated Structural Design: Seamlessly combines the rebound hammer main unit with the sensor, no connecting wires required, ensuring easy portability. The display and mechanical head can be easily disassembled and assembled, and one display can be matched with multiple mechanical heads to improve equipment utilization.
- High-Definition Display Interface: Equipped with a 1.54-inch OLED display with 128×64 resolution, supporting Chinese and English interface switching for simple and intuitive operation.
- High-Precision Detection Technology: Adopts non-contact photoelectric sensor, completely avoiding mechanical wear, poor contact and other defects that are prone to occur in contact sampling methods (such as potentiometer mode). It has the characteristics of high precision and long service life, while retaining the mechanical pointer scale for double guarantee of reading reliability.
- Large-Capacity Data Storage: Can store data of up to 200 standard components, and each standard component can record data of up to 99 test areas, fully meeting the needs of on-site actual testing work.
- Convenient Data Transmission: Equipped with USB 2.0 full-speed communication interface, virtual USB flash drive mode, no need to install any drivers, and can quickly export data to a computer to improve work efficiency.
- Accurate Time Recording: Built-in real-time clock and calendar function, which can automatically record the test date and time of each component, facilitating the traceability and management of test data.
- Intelligent Low-Power Management: Allows free setting of screen backlight brightness and automatic sleep time, with automatic shutdown function to effectively extend the battery life of the device.
- Environmentally Friendly and Long-Lasting Power Supply: Uses high-power AA nickel-metal hydride rechargeable batteries (1.2V, approximately 2500mAh) with long service life, energy saving and environmental protection, and long standby time; equipped with 5V/1A DC charging power adapter for convenient charging.
Specifications
| No. | Item | Unit | Specification |
| 1 | Nominal Kinetic Energy | J | 2.207 |
| 2 | Strength Testing Range | MPa | 10 ~ 60 |
| 3 | Impact Spring Stiffness | N/m | 785±30 |
| 4 | Impact Spring Stretching Length | mm | 75±0.3 |
| 5 | Impact Spring Working Length | mm | 61.5±0.3 |
| 6 | Anvil Calibration Rebound Value | – | ≤80±2 |
| 7 | Sampling Indication Consistency (Difference between Digital Display Value and Pointer Reading) | – | ≤0.5 |
| 8 | OLED Display Resolution | – | 128×64 |
| 9 | Data Storage Capacity (Components) | – | <200 |
| 10 | Clock and Calendar Function | – | Yes |
| 11 | Display Interface Language | – | Chinese/English Switchable |
| 12 | Communication Interface (Virtual USB Flash Drive, No Driver Installation Required) | – | USB2.0 Full Speed |
| 13 | Charging Power Adapter | – | DC 5V/1A |
| 14 | External AA Nickel-Metal Hydride Rechargeable Battery | – | 1.2V, ~2500mAh |
| 15 | Power Consumption (Maximum Backlight) | mA | ≈200 |
| 16 | Weight | kg | ≈1.0 |
Application Scope
This instrument is suitable for engineering quality testing organized by metrological testing institutions, as well as on-site quality spot checks by various engineering quality supervision institutions and supervision units. It can instantly obtain the compressive strength test results of the sampled concrete structures on site, greatly improving the engineering quality testing efficiency of various testing institutions.
Application Fields
Widely used in real estate construction projects, expressway and bridge construction, professional testing institutions, engineering supervision companies and other various concrete structure-related scenarios.
Applicable Standards
Complies with international general standards for rebound hammer testing of concrete compressive strength and rebound hammer verification.
Safety Warnings
Do not use alkaline batteries to connect to a computer for data transmission. This operation is equivalent to charging alkaline batteries, which may cause alkaline battery explosion and pose a serious safety hazard.
Package Includes
1 × Atomfair-DRH-638 Integral Digital Rebound Hammer, 1 × 5V/1A DC Charging Power Adapter, 4 × AA Nickel-Metal Hydride Rechargeable Batteries, 1 × User Manual
If you’re interested, have any questions, or have specific customization requirements, please feel free to contact us at inquiry@atomfair.com.
The device requires exclusive use of high-power AA NiMH rechargeable batteries to avoid explosion hazard. The anvil calibration rebound value must be ≤80±2 and digital-pointer reading difference must not exceed 0.5 for valid measurements.
- Battery Requirement: The device must be powered only with the included high-power AA NiMH rechargeable batteries (1.2V, ~2500mAh) to prevent explosion and ensure proper operation.
- Calibration Constraint: The anvil calibration rebound value must be ≤80±2, and the digital display reading must match the mechanical pointer within ±0.5 for valid measurements.
- Data Transfer Restriction: Alkaline batteries must not be used when the hammer is connected to a computer via USB, as this may cause alkaline battery explosion.
Assemble the rebound hammer and charge the NiMH batteries before first use. Calibrate the instrument, take measurements on concrete surfaces, and export data via USB for analysis.
Required Equipment: Integral Digital Rebound Hammer, DC 5V/1A Charging Power Adapter
- Charge the Batteries
Insert the provided AA NiMH rechargeable batteries into the hammer and connect the DC 5V/1A charger to charge them completely before first use. - Assemble the Display and Mechanical Head
Align the display unit with the mechanical head and push until they lock securely, ensuring a firm connection. - Set Operating Parameters
Press the menu button to select the display language and adjust the backlight brightness and auto-sleep time through the OLED interface. - Calibrate the Instrument
Press the hammer against the calibration anvil and record the rebound value to confirm it falls within the specified tolerance of ≤80±2. - Measure Concrete Strength
Position the hammer perpendicular to the concrete surface, depress the release button, and read the rebound value from the digital display or mechanical pointer. - Export Test Data
Connect the hammer to a computer via USB 2.0, access the virtual flash drive, and copy the stored data files to the computer.
How does the digital reading accuracy compare to the mechanical pointer reading on the Atomfair-DRH-638?
The digital reading and mechanical pointer reading are designed to be highly consistent, with a specified sampling indication consistency (difference between digital display value and pointer reading) of ≤0.5. This dual-readout feature provides a reliability double-check without requiring sensor recalibration against the mechanical scale.
What concrete compressive strength range can the Atomfair-DRH-638 integral digital rebound hammer test?
The Atomfair-DRH-638 covers a strength testing range of 10 to 60 MPa, making it suitable for standard to moderately high-strength concrete. This range aligns with common international general standards for rebound hammer testing, though users should verify applicability for specialized ultra-high-performance concrete outside this span.
Why must alkaline batteries not be used when the Atomfair-DRH-638 is connected to a computer via USB?
Using alkaline batteries during USB data transmission effectively charges them, which can cause alkaline batteries to explode due to their non-rechargeable chemistry. The device is supplied with AA nickel-metal hydride rechargeable batteries (1.2V, ~2500mAh) and a 5V/1A DC charger; only rechargeable nickel-metal hydride cells should be used when the instrument is connected to a computer.
The Atomfair-DRH-638 Integral Digital Rebound Hammer integrates a non-contact photoelectric sensor with a mechanical pointer scale, delivering a 10–60 MPa concrete strength testing range with a nominal kinetic energy of 2.207 J. Its USB 2.0 virtual flash drive interface and 200-component data storage capacity support efficient on-site quality control, though the requirement for nickel-metal hydride batteries and the 5V/1A charging adapter introduces specific power management and safety constraints.
Positive
- Non-contact photoelectric sensor: Eliminates mechanical wear and contact-related sampling defects, improving long-term measurement precision and service life while retaining a mechanical pointer scale for redundant reading verification.
- Integrated modular design: The display and mechanical head are detachable, allowing one display unit to pair with multiple mechanical heads, which increases equipment utilization and simplifies field portability without connecting wires.
Trade-offs
- Battery type restriction: Only nickel-metal hydride rechargeable batteries are supported; using alkaline batteries during data transmission can cause explosion, requiring strict adherence to the specified power source.
- Charging infrastructure dependency: The device relies on a dedicated 5V/1A DC adapter and AA NiMH batteries, which must be managed for charging cycles and standby time, adding a power management step in field operations.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
