Professional Concrete Strength Test Tool:The CTH-80 concrete rebound hammer tester delivers laboratory-grade accuracy with a 10-70MPa test range, ideal for evaluating structural integrity in buildings, bridges, and roads. Enhanced Impact Accuracy:Engineered with 2.207J impact energy and a 75±0.3mm spring stretch, this rebound hammer ensures uniform force application, minimizing human error for precise concrete strength test data. Industrial-Grade Durability:Stainless steel housing and 0.50-0.8N slider friction withstand harsh job sites. Includes shockproof case and calibration tools for long-term rebound tester reliability. Instant-Read Measurement System:Features a 0.65N±0.15N static friction pointer for clear, jitter-free readings. Digital-ready design allows seamless integration with data logging tools (sold separately). Calibration-Ready Kit:Pre-calibrated 80±2 test anvil ensures accuracy out of the box. Complete with grindstone, cross screwdriver, and rebound springs – everything needed for concrete rebound hammer maintenance. The CTH-80 Concrete Test Hammer is a high-quality and precision instrument designed for testing the strength of concrete structures. With a test range of 10-70 MPa and an impact energy of 2.207 J (0.225 Kgf.m), this test hammer delivers reliable and accurate results in concrete strength assessment. Its durable construction, including a 25 mm±1 mm radius spherical tip, ensures longevity and reliability in testing applications. The test hammer is equipped with easy calibration features, with a calibration value on the test anvil of 80±2, allowing users to calibrate and adjust the tool as needed for precise measurements. With a user-friendly design, including a length of spring stretch of 75 ± 0.3 mm and friction specifications for slider and pointer slider, the CTH-80 offers ease of use and accurate readings for concrete testing professionals.