Type B Noble Metal Thermocouple

Type B thermocouple (double platinum-rhodium thermocouple, platinum-rhodium 30-platinum-rhodium 6)
Positive electrode (BP): Platinum-rhodium alloy wire containing 70% platinum and 30% ruthenium;
Negative electrode (BN): Platinum-rhodium alloy wire containing 94% platinum and 6% ruthenium.

Product Name	Type B thermocouple
Thermoelement	Ptrh30-Ptrh6
Grade	II class ±1.5C or 0.25%t
Length	Specify Total length and Immersion length
Tube	99 High-Purity Corundum
Temperature	600~1700℃

Ultra-High Temperature Adaptability：Long-term operating temperature up to 1600°C, with a maximum short-term measurement temperature of 1700°C.
High Stability & Precision：Class II accuracy (tolerance: ±1.5°C or ±0.25%|t|). It features extremely strong oxidation resistance at high temperatures, minimal thermoelectric drift during long-term use, and a far longer service life than ordinary thermocouples.
Reliable Protection & Structure：The protection tube is made of 99% pure corundum (high-purity alumina), which is high-temperature resistant, thermal shock resistant, corrosion resistant, and free of impurity contamination, suitable for high-temperature oxidizing/inert atmosphere environments.
Strong Anti-Interference Capability：The dual platinum-rhodium alloy structure has superior pollution resistance compared to S/R type single platinum-rhodium thermocouples, making it suitable for complex working conditions such as scientific research and industrial high-temperature furnaces.
Flexible Customization：Customizable length (standard specification of this model: L=180mm), installation method and other parameters according to user requirements, adapting to the installation needs of different equipment.

Type B Thermocouple Conductor Combinations And Characteristics

Type	Thermoelement	Temperature range ℃	Function Features
			Advantages	Disadvantages
S	Ptrh10-Pt	0~1600	Suitable for oxidation atmosphere. High precision, stability is not affected by using time.With oxidation resistance, chemical corrosion resistance, can be used as standard thermocouple.	Not suitable for reducing atmosphere (especially H2, metal vapor) and vacuum environment, high cost.
R	Ptrh13-Pt	0~1600
B	Ptrh30-Ptrh6	600~1700	Suitable for more than 1000℃,with small thermoelectric, oxidation resistance and chemical corrosion resistance	Can't be used below 600℃, low sensitivity.

Type B Thermocouple Limit Of Error

	Thermoelement	Type	Limits Of Error(±℃)/Effective Temperature Range(℃)
			1 class	2 class	3 class
Nobel Metal TC	Ptrh10-Pt	S	1.0/600~1100 1+0.003(t-1100)/1100~1600	1.5 or 0.25%t/0~1600	--
	Ptrh13-Pt	R
	Ptrh30-Ptrh6	B	--	1.5 or 0.25%t/600~1700	4.0 or 0.5%t/600~1700