The price of platinum-rhodium alloy thermocouple wire varies considerably depending on the brand, model, and purity. Domestic S-type wire costs approximately 800–1500 RMB/meter, while imported brands (such as Omega and TECO) can cost as much as 2000–4000 RMB/meter. Type B wire, due to its higher rhodium content, is generally 30% or more more expensive.
1. Price Comparison of Domestic and Imported Products
Brand Model Unit Price (RMB/meter) Remarks
Chongqing Chuanyi (CYB) S-type (PtRh10-Pt) 800–1200 Complies with national standard GB/T 16749, high cost performance
Jiangsu Feier S-type pre-calibration kit 1000–1500 Includes installation kit, plug and play
Omega Engineering S-type (PtRh10-Pt) 2500–3500 IEC Grade 1 standard, drift <1μV
Thermo Electric (TECO) B-type (PtRh30-PtRh6) 3500–4500 High purity vacuum melting, suitable for long-term operation at 1600℃
Note: Because both positive and negative electrodes of the B-type wire are platinum-rhodium alloys, the rhodium content is large, and the cost is significantly higher than that of the S-type.
2. Key Factors Affecting Price
Precious Metal Content: Rhodium (Rh) is approximately three times the price of platinum (Pt). Higher Rh content (e.g., type B) results in a higher price.
Manufacturing Process: Advanced processes such as vacuum induction melting and multi-pass wire drawing increase costs but ensure stability.
Certification and Warranty: Products with IEC 60584 Grade 1 certification and traceable testing reports command a significant price premium.
Purchasing Method: Bulk purchases (e.g., minimum order of 10 meters) can enjoy discounts, reducing the unit price by 10%–20%.
Recommendation: Prioritize imported brands for critical workstations; for non-critical workstations, domestic models can be used to control costs.
3. Procurement Channels and Price Reference
Omega Official Website: Supports customized lengths, includes certification reports, and offers transparent pricing;
TECO Official Website: Direct supply from the manufacturer, suitable for high-reliability applications;
Alibaba 1688 Industrial Products: Search for "platinum-rhodium thermocouple wire," filter by brand enterprise stores for more competitive prices;
JD.com Industrial Products: Same-day delivery available for some models, suitable for emergency replacements.
Risk Warning: Unauthorized channels may contain refurbished or adulterated products. Always request invoices and test reports.
