The advantages and disadvantages of N type thermocouple and K type thermocouple _ instrument

The advantages of n type thermocouple: 4 n1o * x6r - `+z' b0t( 我- - - - - - High temperature oxidation resistance is strong, long term stability. K type thermocouple nickel chromium anode preferential oxidation caused by cr, si element in the alloy composition is uneven and thermoelectric drift, cr, si content in n type thermocouple, nickel-chromium alloy oxidation patterns by internal oxidation into external oxidation, the oxidation reaction on the surface only; 6 [ 9h9} 。 p( v4h- Short-term thermal cycling stability at low temperature, and inhibit the magnetic change; 。 - Radiation resistant ability. Easy disintegration of n type thermocouple is cancelled k type element mn, co, further strengthen ability to resist neutron irradiation; , within the range of 400 ~ 1300 ℃, the thermoelectric properties of n type thermocouple linear than k type. ; w9l6l2z; p / n ! R, n type thermocouple drawback: n type thermocouple material is harder than k type, the more difficult processing; The price is relatively expensive. The thermal expansion coefficient of n type thermocouple 15% lower than stainless steel, so the outer casing of n type thermocouple shall adopt the nicrsi/nisi alloy; In - 200 ~ 400 ℃ within the scope of nonlinear error is bigger. Tel: 023 - 68280988, 023 - 68288698