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Standard thermocouple
Platinum rhodium thermocouple is a thermocouple with high accuracy, good physical and chemical properties, excellent oxidation resistance at high temp
Product details
standardThermocouple
1、 Overview
Platinum rhodium thermocouple is a thermocouple with high accuracy, good physical and chemical properties, excellent oxidation resistance at high temperatures, and good stability and reproducibility of thermoelectric potential in the thermocouple series. Therefore, as a standard measuring instrument, standard thermocouples(419.527～1500)The ℃ temperature range is used for temperature value transmission; It is also used for precise temperature measurement within this temperature range.
Standard Platinum Rhodium 10Platinum thermocouple,Its positive pole(SP)Containing rhodium10%Platinum rhodium alloy, negative electrode(SN)For pure platinum.
Second class standard platinum rhodium30-Platinum and rhodium6Thermocouples are mainly used as standard devices1100-1500The ℃ temperature range is used for temperature value transmission and also for precise temperature measurement in this temperature range.
Second class standard platinum rhodium30-Pt-Rh6thermocouple(Hereinafter referred to as standard double platinum rhodium thermocouple)Its positive pole(BP)Containing rhodium30%Platinum rhodium alloy, negative electrode(BN)Containing rhodium6%Platinum rhodium alloy.
2、 The purpose of standard thermocouples:
First class standard thermocouples are used to calibrate second-class standard thermocouples; Second class standard thermocouples are used for verifying industrial thermocouples and precision measurements300℃—1500The temperature within the temperature range of ℃.
3、 Main technical parameters of standard thermocouples
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modelname
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accuracy class
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Main technical parameters
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WRPB-1
First class standard platinum rhodium10Platinum thermocouple
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first-class
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Use temperature zone:300-1300℃
Platinum rhodium wire diameter:0.5-0.015mm，
Length not less than1000mm
E(tCu)=10.575±0.015mV
E(tAl)=5.860+0.37[E(tCu)-10.575]±0.005mV E(tZn)=3.447+0.18[E(tCu)-10.575]±0.005mV
Stability: Copper dots（1084.62℃）≤5μV
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WRPB-2
Second class standard platinum rhodium10Platinum thermocouple
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second
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Use temperature zone:300-1300℃
Platinum rhodium wire diameter:0.5-0.015mm，
Length not less than1000mm
E(tCu)=10.575±0.015mV
E(tAl)=5.860+0.37[E(tCu)-10.575]±0.005mV E(tZn)=3.447+0.18[E(tCu)-10.575]±0.005mV
Stability: Copper dots（1084.62℃）≤10μV
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WRRB-2
Second class standard platinum rhodium30-Platinum and rhodium6Thermocouple
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second
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Use temperature zone:1100-1500℃
E（1100℃）=5.780soil0.025mVE（1500℃）=10.099scholar0.040mV
Second class standard platinum rhodium30-Platinum and rhodium6The stability of thermocouples depends on their1500The change in thermoelectric potential at ℃ determines that the annual variation does not exceed18μV.
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Cover of Standard Thermocouple User Manual
Sample of Product Qualification Certificate
national standard:JJG75-1995Standard Platinum Rhodium10-Verification Regulations for Platinum Thermocouples
JJG167-1995Standard Platinum Rhodium30Platinum rhodium6Thermocouple Verification Regulations
Note: Waste platinum resistance thermometers, standard thermocouple wires, and industrial waste platinum rhodium wires can be exchanged for new or recycled at a fixed price.
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