Our DW1441 Notched Constant Tensile Load Tester strictly to design according ASTM D5397. This machine also named Environmental Stress Cracking Tester.
All of the sample holder is fixed on a metal frame; the metal frame has a solution pool below; solution pool by motor control, can rise and fall; when you click on the screen to rise when the solution pool rises, the metal frame and all samples were soaked in the solution.
Each sample holder has a lever and weight behind the connection; the lower end behind the lever has a limit switch; when the sample is broken, due to the load effect, the lever end behind the sink, will trigger the limit switch, instrument stop timing; each sample individually timed, each lever arranged below the lower end has a limit switch, fracture time was controlled for each sample.