Introduction:The meter is in accordance with technical regulation of JGJ/T23-2001, used for testing of concrete compressive strength within the scope of 10-60Mpa, with the system standard energy of 2.207J, and value indicating system of pointer direct reading. Our concrete resiliometer has been approved as “Recommended Product for Engineering Construction’’ By the Ministry of construction.Shanxi Institute of Building Research, who composed "Testing Concrete Compressive Strength Technical Regulation of JGJ/T23-2001 with Spring back Method", supervises the manufacturing process.Concrete test hammer generally applied to test the strength of concrete components, such as building, panels, beams, columns, bridges.Feature:Light saving 2/3 forces compared with counterpart productsFlexible, inexpensive, power-free, easy to masterThe button applies stretching technics and is not easy to fall offThe pointer is easy to adjust frictionThe first choice applicable for on-the-spot NDTSpecifications:Length of pointer: 20.0±0.2 (mm)Friction of pointer: 0.65±0.15 (N)Sphere semi diameter at the end of the flip rod: 25±1.0 (mm)Rigidity of flip tensioned spring: 785.0±40.0 (N/m)Location of flip hammer's hook release: "100" at the scale markWork length of flip tensioned spring: 61.5.0± 0.3(mm)Strike length of flip hammer: 75±0.3(mm)Hop location of the flip hammer: "0" at the graduated scaleFixed value of steel anvil: 80±2 (our products are controlled between 80-81)Package Content:ZC3-A Concrete Rebound Hammer TesterGrindstoneFlip tension springBuffer springScrewdriverInstruction Manual