Abstract: A method of manufacturing temperature-sensitive instruments includes supplying first and second webs of insulating material in synchronism with each other to a work station, the first web having a series of first holes formed therein offset from a series of second holes formed in the second web. An electrical conductor is disposed transversely between the first and second webs such that the conductor forms pairs of conducting lines, one line of each pair being in register with a corresponding one of the first holes and the other line of each pair being in register with a corresponding one of the second holes. After connecting each pair of connecting lines to a temperature-sensitive sensor, the first and second webs are cut at spaced intervals between adjacent pairs of conducting lines to form a plurality of temperature-sensitive instruments.