{"Designation":"...N","CompositionsAndTradeNames":"Denotes the negative thermoelement of a given thermocouple type."}
{"Designation":"...P","CompositionsAndTradeNames":"Denotes the positive thermoelement of a given thermocouple type."}
{"Designation":"BN","CompositionsAndTradeNames":"Pt-nominal 6% Rh."}
{"Designation":"BP","CompositionsAndTradeNames":"Pt-nominal 30% Rh."}
{"Designation":"EN or TN","CompositionsAndTradeNames":"Nominally 55% Cu, 45% Ni, constantan: Cupron(TM), ThermoKanthal JN(TM), Advance(TM); often referred to as Adams constantan."}
{"Designation":"EP or KP","CompositionsAndTradeNames":"Nominally 90% Ni, 10% Cr: Chromel(TM), Tophel(TM), ThermoKanthal KP(TM), T-1(TM)."}
{"Designation":"JN","CompositionsAndTradeNames":"A Cu-Ni alloy similar to, but usually not interchangeable with, EN and TN; SAMA specification."}
{"Designation":"JP","CompositionsAndTradeNames":"Nominally 99.5% Fe: ThermoKanthal JP(TM)."}
{"Designation":"KN","CompositionsAndTradeNames":"Nominally 95% Ni, 2% Al, 2% Mn, 1%Si.: Alumel(TM), Nial(TM), T-2(TM), ThermoKanthal KN(TM)."}
{"Designation":"NN","CompositionsAndTradeNames":"Nominally 95% Ni, 41/2% Si, 1/10% Mg, nisil."}
{"Designation":"NP","CompositionsAndTradeNames":"Nominally 84% Ni, 14% Cr, 11/2% Si, nicrosil."}
{"Designation":"RN, SN","CompositionsAndTradeNames":"High-purity platinum."}
{"Designation":"RP","CompositionsAndTradeNames":"Platinum-13% rhodium."}
{"Designation":"SP","CompositionsAndTradeNames":"Platinum-10% rhodium."}
{"Designation":"TP","CompositionsAndTradeNames":"High-purity copper."}