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Platinum rhodium wire material (Type S) Manufacturers
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  • Platinum rhodium wire material (Type S)

Platinum rhodium wire material (Type S)

Platinum rhodium wire is a binary alloy based on platinum containing rhodium, which is a continuous solid solution at high temperatures. Rhodium can enhance the thermoelectric potential and acid corrosion resistance of alloys compared with platinum. There are alloys such as PtRh5, PtRhl0, PtRhl3, PtRh30, and PtRh40. Alloys with Rh content greater than 20% are insoluble in aqua regia. Mainly used as thermocouple materials, PtRhl0/Pt, PtRh13/Pt, etc. are used as thermocouple wires in thermocouples to directly measure or control the temperature of fluids, vapors, gas media, and solid surfaces within the range of 0-1800 ℃ in various production processes.  

Advantages: 
Platinum-rhodium wire has the advantages of high accuracy, good stability, wide temperature measurement range, long service life, and high temperature measurement upper limit in the thermocouple series. Suitable for oxidizing and inert atmospheres, and can also be used in vacuum for a short period of time, but not suitable for reducing atmospheres or atmospheres containing metal or non-metal vapors.
Industrial thermocouples have platinum-rhodium wire models B, S, and R. Platinum-rhodium thermocouples, also known as high-temperature precious metal thermocouples, are divided into single platinum-rhodium (platinum-rhodium 10) and double platinum-rhodium (platinum-rhodium 30, platinum-rhodium 6). They are used as temperature measurement sensors and are usually used in conjunction with temperature transmitters, regulators, and display instruments to form process control systems. They are used to directly measure or control the temperature of fluids, vapors, gas media, and solid surfaces within the range of 0-1800 ℃ in various production processes.   

Application industries: 
Almost all industrial fields such as steel, power generation, petroleum, chemical, fiberglass, food, glass, pharmaceuticals, ceramics, non-ferrous metals, heat treatment, aerospace, powder metallurgy, carbon, coking, printing and dyeing.                                                                  

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FAQ Performance Specifications

Q1: What is the temperature measurement range of S-type platinum-rhodium wire, and is compensation wire required?
A: Long term use at 0-1300 ℃, with a short-term maximum of 1600 ℃. The thermoelectric potential at the cold end cannot be ignored, and S-type specialized compensation wires must be used instead of ordinary copper wires; otherwise, it will introduce significant temperature measurement errors.

Q2: Which working conditions are not suitable for using S-type platinum rhodium wire?
A: Suitable for oxidizing and inert atmospheres; It is strictly prohibited to use bare wire in a reducing atmosphere, sulfur, phosphorus, or metal vapor environment, as it is prone to corrosion and brittle fracture. High-temperature applications should be isolated and protected with corundum protective sleeves.

Q3: How to choose between S-type and R-type platinum rhodium wires?
A: S-type platinum rhodium has lower content and more cost advantages; the high-temperature strength and anti-pollution ability are weaker than the R-type. S-type is preferred when the operating temperature is ≤ 1300 ℃; If the temperature is close to 1400 ℃ or the environmental medium is complex, it is recommended to choose R-type to improve its service life.

Thermocouple Wire Type Long-Term Operating Temperature Short-Term Operating Temperature
Platinum-Rhodium 10-Platinum S 0 – 1400 °C 0 – 1600 °C

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Xinguo Group Co., Ltd.
ABOUT US Xinguo Group Co., Ltd.
Xinguo Group Co., Ltd. is a high-tech enterprise with subsidiaries including Anhui Xinguo Instrument Co., Ltd., Anhui Xinguo Alloy Co., Ltd., Anhui Xinguo Cable Co., Ltd. and Anhui Xinguo Precious Metals Co., Ltd. Founded in 1997, the Group is located in Tianchang City, Anhui Province — a National Civilized City. It has a registered capital of 118 million RMB, covers a land area of over 150 mu and a building area of 60,000 square meters. The company currently has more than 300 employees, among whom over 50 are professional and technical personnel including senior engineers, engineers and assistant engineers.
The Group is a China Custom Platinum rhodium wire material (Type S) Manufacturers and Platinum rhodium wire material (Type S) Supplier, mainly engages in the R&D, production and sales of temperature instruments, pressure instruments, level instruments, flow instruments and digital display instruments. Its product portfolio also encompasses power cables, control cables, compensation cables, computer cables, signal cables, MI heating cables, mineral insulated cables, electric heat tracing tapes, cable trays and accessories, high and low voltage distribution equipment, complete automation control systems, instrument valves, pipeline valves and fittings, glass instruments and laboratory equipment. We also supply platinum-rhodium wires, precision alloys and complete mechanical equipment, while providing supporting processing, manufacturing, sales and technical services. Additionally, we deal in professional instrument materials, alloy materials and precious metals. Our products are widely applied in power, petroleum, chemical, metallurgy, building materials, machinery, food, aerospace, new energy and other industrial sectors, as well as scientific research and education fields.
Anhui Xinguo Alloy Co., Ltd. is dedicated to manufacturing a full range of precision alloy materials and serves as a council member of the Instrument Materials Branch of China Instrument & Control Society. Its flagship products cover thermocouple alloy wires (K, N, E, J, T types), thermocouple compensation alloy wires (KX, EX, NX, JX, TX, KCA, KCB, NC, SC), high-resistance heating alloys, precision resistance alloys, heating resistance alloys, pure nickel wires, manganese-copper alloys and Monel alloys. These products are extensively used in aviation, petroleum, chemical engineering, machinery manufacturing, power and energy industries.
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