Thermocouple and RTD users interested in knowing the range and accuracy values of the instruments they use or plan to buy can check manufacturers’ sites for great information. One such source is

While there, look for a comparison of temperature sensors and their response times. There's also detail on thermocouple alloy use and characteristics, which includes a chart showing thermocouple-wire limits of error. The website, from Nanmac Corp. in Framingham, Mass., carries charts, tables, white papers and links to related sites. Click on "Resources" to access the material.