Profile: B. T. Technology, Inc. offers stress crack equipment, permittivity equipment, geosynthetic thickness devices, sample preparation equipment, melt flow index equipment and geosynthetic installation equipment. Our 20 station ASTM D5397 system features stainless steel temperature controlled bath with water level maintenance reservoir & solution circulation system, durable modular design consisting of a stainless steel frame supporting 5 levers per unit and anodized aluminum levers.