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B-Type Thermocouple Wire for Extreme Heat Environments Accurate Thermal Detection

Categories Thermocouple Cable
Brand Name: Huona
Model Number: Type B
Certification: ISO9001
Place of Origin: Shanghai
MOQ: 10g
Price: Negotiable
Payment Terms: L/C,T/T,Western Union,MoneyGram
Supply Ability: 1000 m per month
Delivery Time: 5-21 days
Packaging Details: Carton/Wooden Case
Product Name: Thermocouple Wire Type B
Positive: PtRh30
Negative: PtRh6
Wire Diameter: 0.5mm, 0.8mm, 1.0mm (tolerance: -0.02mm)
Tensile Strength (20°C): ≥150 MPa
Elongation: ≥20%
Electrical Resistivity (20°C): Positive leg: 0.31 Ω·mm²/m; Negative leg: 0.19 Ω·mm²/m
Thermoelectric Power (1000°C): 0.643 mV (vs 0°C reference)
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B-Type Thermocouple Wire for Extreme Heat Environments Accurate Thermal Detection

Product Description

Type B Thermocouple Wire

Product Overview

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.

Standard Designations

  • Thermocouple Type: B-type (Platinum-Rhodium 30-Platinum-Rhodium 6)
  • IEC Standard: IEC 60584-1
  • ASTM Standard: ASTM E230

Key Features

  • 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

Technical Specifications

AttributeValue
Wire Diameter0.5mm, 0.8mm, 1.0mm (tolerance: -0.02mm)
Thermoelectric Power (1000°C)0.643 mV (vs 0°C reference)
Thermoelectric Power (1800°C)13.820 mV (vs 0°C reference)
Long-Term Operating Temperature1600°C
Short-Term Operating Temperature1800°C (≤10 hours)
Tensile Strength (20°C)≥150 MPa
Elongation≥20%
Electrical Resistivity (20°C)Positive leg: 0.31 Ω·mm²/m; Negative leg: 0.19 Ω·mm²/m

Chemical Composition (Typical, %)

ConductorMain ElementsTrace Elements (max, %)
Positive Leg (Platinum-Rhodium 30)Pt:70, Rh:30Ir:0.02, Ru:0.01, Fe:0.003, Cu:0.001
Negative Leg (Platinum-Rhodium 6)Pt:94, Rh:6Ir:0.02, Ru:0.01, Fe:0.003, Cu:0.001

Product Specifications

ItemSpecification
Length per Spool5m, 10m, 20m (due to high precious metal content)
Surface FinishAnnealed, bright (no surface contamination)
PackagingVacuum-sealed in argon-filled titanium containers to prevent oxidation
CalibrationTraceable to international temperature standards with certified EMF curves
Custom OptionsPrecision cutting, surface polishing for high-purity applications

Typical Applications

  • 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

Quality B-Type Thermocouple Wire for Extreme Heat Environments Accurate Thermal Detection for sale
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