Windsor Pin System Test
Windsor probe testing ASTM C803
Windsor Pin System is a spring-loaded device drives a special high-strength steel pin
into the surface of concrete or mortar and the depth of penetration is measured. The
depth of penetration is inversely proportional to compressive strength This system
provides a fast and efficient way of determining the in-situ compressive strength of
concrete to a maximum of 5300 PSI (36.9 MPa).