Profile: Ecklund-Harrison Technologies, Inc. manufactures all the equipment necessary for heat penetration tests except for the indication or recording instrument. Our thermocouples are specially designed for conducting heat penetration tests of foods in cans, jars and plastic packages. Our C-9 is identical to the C-5 except that has an additional external thread for locking the connector (C-10) to the receptacle to prevent accidental disconnection during a rotating or agitating process. We also offer C-18 bottle receptacle, which is designed for use with regular and twist-off style crowns.