Pt100 temperature sensor

Buyers must prioritize the Accuracy Class, typically categorized as Class AA (1/3 DIN), Class A, or Class B according to IEC 60751. For industrial precision, Class A is the standard. Additionally, verify the Temperature Range (standard probes cover -200°C to +600°C) and the Wiring Configuration, where 3-wire and 4-wire systems are preferred over 2-wire to compensate for lead wire resistance and ensure measurement stability.

The choice of Sheath Material is critical for longevity. Stainless Steel 304 is suitable for general use, while SS316L is required for corrosive or food-grade environments. For high-temperature applications exceeding 500°C, Inconel 600 is recommended. Furthermore, ensure the sensor is Mineral Insulated (MI) if high vibration resistance and flexibility are needed for the installation path.

For European markets, CE marking and RoHS compliance are essential to ensure safety and environmental standards. If the sensors are used in hazardous areas (oil, gas, or chemical plants), they must carry ATEX or IECEx explosion-proof certifications. For food and beverage applications, look for FDA or 3-A Sanitary Standards to guarantee the materials are non-toxic and easy to clean.

Request a Calibration Certificate traceable to national standards (like NIST or equivalent). To test performance, evaluate the Thermal Response Time (T0.5 or T0.9); high-quality sensors should reach 50% of the final value within seconds in moving water. It is also advisable to check the Insulation Resistance, which should be >100MΩ at 100V DC at room temperature to prevent signal leakage.

The primary risk is Material Substitution, where suppliers use lower-grade platinum or thin-film elements instead of wire-wound ones without disclosure. Another risk is Inconsistent Calibration across batches. To mitigate this, use Made-in-China.com's Secured Trading services and insist on a Pre-shipment Inspection (PSI) by a third party like SGS or Intertek to verify accuracy against your specs.

Focus on Batch Consistency and Warranty Terms. Negotiate a warranty period of at least 12-24 months. For large-scale projects, request Volume-Based Pricing with a tiered discount structure (e.g., 10-15% off for orders over 500 units). Ensure the contract specifies that technical support and replacement of defective units are covered at the supplier's expense, including international shipping.

PT100 elements, especially ceramic wire-wound types, are fragile and sensitive to mechanical shock. Ensure the supplier uses Anti-static (ESD) packaging and robust internal cushioning. For shipping to distant regions, specify Vacuum Sealing for lead wires to prevent oxidation during sea freight. Always clarify Incoterms (e.g., DAP or CIF) to define who bears the risk during transit.

Always conduct transactions through verified payment channels provided by professional platforms like Made-in-China.com to protect your funds until delivery is confirmed. Check the Harmonized System (HS) Code (typically 9025.19) to calculate accurate Import Duties and VAT in your country. Ensure all Commercial Invoices and Packing Lists match the physical goods exactly to avoid customs delays or seizures.