Hittites deals with Crack opening displacement (COD) transducers are designed specifically to perform standard ASTM and ISO fracture mechanics tests (both cyclic and static), covering all common specimen geometries (CT, SEB, Centre Crack, Arc Shaped). Accidental damage precaution is taken care, Gauges were designed to meet high frequency more than 200Hz, Hittites offers CCOD gauges for +/- temperatures.