Film Free Shrink Testers are used in heat shrinkage test of all kinds of films in liquid under various temperatures. It characteristics includes aluminum test chamber guarantee the even and rapid heat, temperature P.I.D. control system, parameter LCD display and friendly human- equipment interaction, function of auto timing guarantee the accurate test, special specimen shelf makes the operation easy, conforming to GB standard, and compatible with ASTM and other standard, safe and reliable. It is made up with liquid test chamber, heating elements, control elements. It is applied to place the specimen, heating elements are applied to get the test temperature preset, control system is applied to set and monitor the test parameters.