Type B thermocouple wire is a high-performance precious metal
thermocouple consisting of two platinum-rhodium alloys: a positive
leg with 30% rhodium and 70% platinum, and a negative leg with 6%
rhodium and 94% platinum. Designed for extreme high-temperature
environments, it is the most heat-resistant among common precious
metal thermocouples, excelling in stability and oxidation
resistance at temperatures exceeding 1500°C. Its unique
dual-platinum-rhodium composition minimizes drift caused by
platinum evaporation, making it ideal for long-term
high-temperature measurement.
- Thermocouple Type: B-type (Platinum-Rhodium 30-Platinum-Rhodium 6)
- IEC Standard: IEC 60584-1
- ASTM Standard: ASTM E230
- Extreme Temperature Resistance: Long-term operating temperature up to 1600°C; short-term use up
to 1800°C
- Low EMF at Low Temperatures: Minimal thermoelectric output below 50°C, reducing cold junction
error impact
- Superior High-Temp Stability: ≤0.1% drift after 1000 hours at 1600°C
- Oxidation Resistance: Excellent performance in oxidizing atmospheres; resistant to
platinum evaporation
- Mechanical Strength: Maintains ductility at high temperatures, suitable for harsh
industrial environments
- High-temperature sintering furnaces (ceramic and refractory
materials)
- Metal smelting (superalloy and special steel production)
- Glass manufacturing (float glass forming furnaces)
- Aerospace propulsion testing (rocket engine nozzles)
- Nuclear industry (high-temperature reactor monitoring)
We provide Type B thermocouple assemblies with ceramic protection
tubes and high-temperature connectors. Due to the high material
value, sample lengths are limited to 0.5-1m upon request,
accompanied by full material certificates and impurity analysis
reports. Custom configurations for specific furnace environments
are available
