Hot cords are used in laboratories and various other research or experimental facilities where it is necessary to maintain short heating-up periods while heating shapes and parts to high temperatures. These are generally convenient for heating small glass tubes and vessels. Available in fibrox, quartz and glass construction, these are designed for varied applications and uses, up till temperature 800 C.
Fibrox constructed cords- The cord is made of standard insulated, braided heating tape with a heavy fabric covering. The temperature ranges to 480 degree C. Besides, it easily resists moisture, vapors and solvents. It is ideal for heating small, tubes or where space is limited.
Quartz- A nickel/chrome heating elements is wounded on an organic core with two feet of insulated unheated lead at each end of the heating section. The temperature ranges to 450 degree C.
Glass- It has four feet of insulated unheated flexible lead at each end of the section. Besides, it is covered with a tough external sheath of braided glass fibre. The temperature ranges to 800 degree C.