Concrete Rebound Hammer Tester Resiliometer Schmidt Hammer Test Meter Tool within the scope of 10-60Mpa ZC3-A Product Description:  It 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 Springback Method", supervises the manufacturing process. Product Characteristics:  Hammer shell with special treatment, high hardness, long-term use of non-draw traces in raw materials processing technology, precision design other aspects of life are greatly improved. Package include:   1PCS x Concrete Rebound Hammer 1PCS x Millstone 1PCS x Flip extension spring 1PCS x Buffer spring 1PCS x Screwdriver 1PCS x Manual Upgraded type with English label for your choice : product link: https://www.amazon.com/dp/B07DW2QNF4 Length of pointer: 20.00.2 (mm) Friction of pointer: 0.650.15 (N) Sphere semi diameter at the end of the flip rod: 251.0 (mm) Rigidity of flip tensioned spring: 785.040.0 (N/m) Location of flip hammer&#039;s hook release: &#034;100&#034; at the scale mark Work length of flip tensioned spring: 61.5.0 0.3(mm) Strike length of flip hammer: 750.3(mm) Hop location of the flip hammer: &#034;0&#034; at the graduated scale Fixed value of steel anvil: 802 ( Controlled between 80-81) <span class="a-text-bold">Light saving 2/3 forces</span> compared with counterpart products <span class="a-text-bold">Button applies stretching technics</span> and is not easy to fall off Pointer is <span class="a-text-bold">easy to adjust friction</span> The first choice applicable for <span class="a-text-bold">on-the-spot NDT</span> First,measure the <span class="a-text-bold">average rebound value of concrete</span><span class="a-text-bold">(Rm )</span>using the Concrete Rebound Hammer Then refer to the instruction manual to obtain the strength value of the measurement zone and calculate the standard deviation with a certain formula finally get the strength value of the component. Maintenance is required when one of following occurs: 1.Value of Steel anvil rate is extremely erroneous. 2.Worked for over 2000 times. 3.Stored for more than 6 months 4.The anvil rate is too low All Hammer from us is in accordance with technical regulation of <span class="a-text-bold">JGJ/T23-2001 </span>with<span class="a-text-bold">Verification Certification</span> Shanxi Institute of Building Research, who composed &#034;Testing Concrete Compressive Strength Technical Regulation of JGJ / T23-2001 with Springback Method&#034;, supervises the manufacturing process.