WTC-H Concrete Test Hammer for nondestructive detection structure and concrete compressive strength of the instrument. The surface hardness of concrete structures by detecting the estimated strength of concrete structures. The instrument uses valuation bomb shells hit the hammer spring drive mapping equipment manufacturing , shells hit one end of the rod to detect contact with the shells hit the surface of the concrete elements try the other end face, resulting in resilience. In the role of resilience, playing hammer push pointer sliders are moved so as to obtain a pointer readings reasonable instrument structure easy calibration mapping equipment calibration and maintenance. Small size, light weight, the type of surveying instruments, but to carry suitable for field testing geological compass needle 1. Damping time (needle deflection 90 ° to stay in the original position of the time) for 30- 60 seconds. 2. reading error: a) the degree of rotation of the needle before and after the indicated error is not more than 0.5 °; b) needle at 0-180 °, 90-270 ° at the eccentric caused by error of less than 0.5 °; c) of the goniometer reading error of less than 0.5 ° 3. sensitivity level: a) vial for 15 '± 3' / 2mm b) Circular level for 30 '± 5' / 2mm 4. Instrument Dimensions (L × W × H) for 85 × 73 × 35 mm. 5. The instrument weighs less than 0.27kg. Direct laser range finder to measure the distance: Press the first under the laser (note not facing the eye), targeting and then click to complete the distance measurements. Indirect measurement of distances: can indirectly measure the height of the front wall of the Pythagorean theorem. Measured area / volume: Use the space calculation function can easily calculate the area and volume of space. Splash measure: Thanks to IP54 protection grade design that allows you to operate freely in the construction site in a variety of harsh environments. Manufacture of surveying instruments, surveying instruments, Jinke instrumentation provided by Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) strong, credible, in Qingdao, Shandong analytical instruments industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Branch of the Instrument and you hand in hand into the brilliant, for a better future!