YAGEO Releases Cost Efficient Pt‑RTD Sensors with Ni wires

The MB‑Series Pt‑RTD temperature sensors from YAGEO Group Nexensos are designed for demanding, high‑volume applications that require accurate temperature measurement, robust mechanical performance and cost stability.

The YAGEO Pt-RTD sensor series combines a wide operating temperature range with high vibration resistance and the use of nickel lead wires to help decouple sensor cost from platinum price fluctuations. This makes it particularly attractive for OEMs scaling production of appliances, HVAC systems and other thermal process equipment.

Key features and benefits

• Wide operating temperature range from −70 °C to +500 °C with short‑term exposure capability up to +550 °C, allowing use in both low‑temperature HVAC environments and self‑cleaning or pyrolytic heating cycles in ovens.
• Platinum RTD technology with nominal resistance options of 100 Ω and 1000 Ω at 0 °C, supporting common readout electronics and simplifying integration into existing measurement front‑ends.
• DIN EN 60751 tolerance classes F 0.3 (B) and F 0.6 (2B), providing defined accuracy bands over the full operating range for predictable system error budgeting.
• Ni lead wires instead of platinum to reduce dependency on volatile platinum prices and improve long‑term cost stability of the sensing element.
• High vibration and shock resistance, making the sensors suitable for applications with mechanical shock or continuous vibration, such as compressors or fan units.
• Optimized for welding processes, enabling reliable attachment in welded assemblies and automated high‑volume production lines.
• Pb‑free, RoHS‑conform design, supporting compliance with current environmental regulations and long‑term market access.
• Targeted at high‑volume production, offering stable quality and availability for large series manufacturing.

Typical applications

The MB‑Series is positioned for high‑volume, cost‑sensitive equipment where thermal stress and mechanical robustness are both critical:

• Pyrolytic and self‑cleaning ovens, including built‑in temperature monitoring in the hottest zones.
• HVAC systems (heating, ventilation, air conditioning) for air temperature sensing, heat exchangers and protection functions.
• Consumer appliances such as cookers, dryers, dishwashers and other white goods requiring long‑term stable temperature control.

In these applications, Pt‑RTD sensors are often preferred over simpler NTC thermistors where linearity, interchangeability between lots and long‑term drift performance are important for accurate and stable control loops.

Technical highlights

Operating characteristics

The wide operating range allows a single sensor type to cover both ambient‑level measurements and high‑temperature process monitoring, simplifying part number management across platforms. DIN EN 60751 tolerance classes F 0.3 (B) and F 0.6 (2B) define the maximum permissible deviation from the nominal resistance‑temperature curve, supporting precise sensor selection based on system accuracy targets.

Mechanical robustness and process integration

• High vibration and shock resistance supports installation in compressors, fans and other rotating‑machinery environments without excessive drift or early failures.
• Design optimized for welding enables direct welding of the sensor assembly into metal structures, improving thermal coupling and repeatability in automated production lines.
• Longer service life in harsh environments thanks to the robust mechanical design, which helps reduce maintenance and field replacement costs over the lifetime of the equipment.

For OEMs, the weld‑optimized construction means fewer process trials and more stable yield when integrating the sensors into series production, particularly where joining to metal housings or brackets is required.

Design‑in notes for engineers

For design engineers, the MB‑Series Pt‑RTD sensors provide a flexible platform for temperature measurement in thermally demanding and mechanically stressed environments. The following practical points can help streamline design‑in and qualification:

• Define accuracy requirements against DIN EN 60751
  Decide early whether class F 0.3 (B) or F 0.6 (2B) is sufficient based on the total temperature error budget of the system, including ADC resolution, wiring and calibration strategy.
• Choose between 100 Ω and 1000 Ω nominal resistance
  100 Ω sensors are widely supported by legacy and industrial measurement circuits, while 1000 Ω variants can provide higher signal levels and potentially improved resolution at the same excitation current.
• Consider self‑heating in high‑precision applications
  Select excitation current such that self‑heating of the Pt‑RTD remains negligible across the operating range, especially at higher ambient or process temperatures.
• Exploit mechanical robustness in mounting concepts
  Use the high vibration and shock resistance to place the sensor closer to heat sources or moving elements, but ensure mechanical stress from clamping or welding remains within the recommendations of the manufacturer.
• Integrate welding‑optimized design into production tooling
  Align weld geometries, fixtures and process parameters with the sensor construction to maintain repeatable thermal coupling and avoid microcracks or lead damage.
• Address long‑term stability and interchangeability
  Platinum RTD technology combined with defined tolerance classes supports sensor interchangeability without individual calibration, which can reduce calibration effort in high‑volume production lines.
• Account for Ni lead wires in circuit layout
  While the sensing element follows the standard platinum characteristic, the nickel lead wires should be considered in wiring resistance calculations, especially for 2‑wire configurations; for higher accuracy, 3‑ or 4‑wire connections are recommended according to typical Pt‑RTD practice.

These points can be complemented by application‑specific reliability testing such as thermal cycling, vibration endurance and long‑term drift evaluation using the actual mounting and drive conditions expected in the final product.

Source

The information in this article is based on the official MB‑Series Pt‑RTD press release and associated product brief and documentation provided by YAGEO Group Nexensos, with additional independent commentary focused on design‑in considerations for engineers and purchasers.

References

1. YAGEO Group – PT RTD MB Series with Ni Wires press release
2. YAGEO Group – MB‑Series Pt‑RTD Product Brief (PDF)
3. YAGEO Group – Temperature sensors product overview