New thermoresistors produced by thermal diffusion of the alloy Fe-Co into glass are reported. The sensors are produced by a simple and novel method, and their operating principle is described. The sensitivity of these thermoresistors is 18&20% per degree at 20 K and 0.8-1 % per degree at 600 K. The Fe-Co sensors can bear multiple thermocycling from 4.2K to 600K without any loss of sensitivity or alteration to other parameters.
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