These remarkable springs, based on a brass alloy, ‘remember’ to open up at around 90°C and close again when cool. If immersed in hot water at or around 90°C they will open in a split second and close as quickly if dropped in cold water. Such springs have many industrial applications — e.g., in sprinkler and fire damping systems where they replace expensive single-use only fusible links. Memory springs open and close with considerable force and are used in countless applications where movement is wanted at the opening and closure threshold temperatures. Spring weight: 3 g.
https://www.mindsetsonline.co.uk/product_info.php?products_id=1151
Post time: Jun-21-2017