- ANSI : American National Standards Institute
- ANSI Type J, the positive wire is iron, the negative wire is Constantan (45% nickel, 55% copper). This type is capable of temperatures (when insulated with compacted 96% pure Magnesium Oxide, MgO and stainless steel sheath) from 32 to 1500 deg. F (0 to 815 deg.C). The lead wire inner insulation color code is white on the positive iron leg [magnetic], and red on the negative Constantan [non magnetic].
- ANSI Type K, the positive wire is Chromel (90% nickel, 10% chromium), the negative wire is Alumel (95% nickel, 2% aluminum, 2% manganese, 1% silicon). This type is capable of temperatures (when insulated with compacted 96% pure Magnesium Oxide, MgO and an outer sheath) from -32 to 2300 deg. F (-35 to 1260 deg.C). If your average application temperature is between 600 to 1100 deg. F it is recommended to use Type J calibration due to short range ordering that can cause a drift of +2 to +4 deg. F in a short period of time, a few hours. The lead wire inner insulation color code is yellow on the positive Chromel leg [non magnetic], and red on the negative Alumel [magnetic].
- ANSI Type T, the positive wire is pure Copper, the negative wire is Constantan (45% nickel, 55% copper). This type is capable of temperatures (when insulated with compacted 96% pure Magnesium Oxide, MgO and stainless steel sheath) from 32 to 660 deg. F (0 to 350 deg.C). The lead wire inner insulation color code is blue on the positive iron leg, and red on the negative Constantan. When no lead wire is apparent the polarity is determined visually, the copper “colored” wire is the positive and the “white metal” appearing wire is the negative.
- ANSI Type E, the positive wire is Chromel (90% nickel, 10% chromium), the negative wire is Constantan (45% nickel, 55% copper). This type is capable of temperatures (when insulated with compacted 96% pure Magnesium Oxide, MgO and an outer sheath) from 32 to 1650 deg. F (0 to 900 deg.C). If your average application temperature is between 600 to 1100 deg. F it is recommended to use Type J calibration due to short range ordering that can cause a drift of +1 to +3 deg. F in a short period of time, a few hours. The lead wire inner insulation color code is purple on the positive Chromel leg [non magnetic], and red on the negative Constantan [non magnetic]. When no lead wire is apparent, the polarity can only be determined by performing a thermocouple function check.
- Other calibrations or thermocouple types such as N, R, S, and others not listed, are available, please consult the factory for your special request.
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