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Introduction:
Platinum-rhodium alloy thermocouple bare wire is a commonly used thermocouple temperature measurement device, which is composed of alloy wires of platinum and rhodium. According to different alloy compositions and structures, they can be divided into B-type, R-type and S-type thermocouple bare wires.
The measurement principle of these platinum-rhodium alloy thermocouple bare wires is based on the thermoelectric effect, that is, temperature changes cause a small potential difference between the alloy wires. By measuring this potential difference, the temperature of the environment can be accurately calculated. They offer good corrosion resistance and low thermocouple resistance drift, making them suitable for applications requiring high accuracy and long-term stability.
Thermocouple wire type B:
Type B thermocouple bare wire uses platinum-rhodium alloy wire (platinum 70%, rhodium 30%) and platinum-rhodium alloy wire (platinum 94%, rhodium 6%) as thermocouple materials. It has a wide temperature measurement range (usually from 0 degrees Celsius to 1820 degrees Celsius), high accuracy and stability, and is suitable for various temperature monitoring and control application scenarios.
Thermocouple wire type R:
Type R thermocouple bare wire uses platinum-rhodium alloy wire (87% platinum, 13% rhodium) and pure platinum wire as thermocouple materials. It has a wide high temperature measurement range (usually from 0 degrees Celsius to 1768 degrees Celsius), high accuracy and reliability, and is suitable for industrial control and scientific research applications in high temperature environments.
Thermocouple wire type S:
S-type thermocouple bare wire also uses platinum-rhodium alloy wire (platinum 90%, rhodium 10%) and platinum-rhodium alloy wire (platinum 94%, rhodium 6%) as thermocouple materials. It has a wide temperature measurement range (usually from 0 degrees Celsius to 1768 degrees Celsius), high accuracy and reliability, and is suitable for industrial control and scientific research applications in various high temperature environments.
ASTM | ANSI | IEC | DIN | BS | NF | JIS | GOST |
(American Society for Testing and Materials) E 230 | (American National Standard Institute) MC 96.1 | (European Standard by the International Electrotechnical Commission 584)-1/2/3 | (Deutsche Industrie Normen) EN 60584 -1/2 | (British Standards) 4937.1041, EN 60584 - 1/2 | (Norme Française) EN 60584 -1/2 - NFC 42323 - NFC 42324 | (Japanese Industrial Standards) C 1602 - C 1610 | (Unification of the Russian Specifications) 3044 |
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Q&A:
Which temperature range is suitable for type B thermocouple bare
wire?
A: Type B thermocouple bare wire is suitable for high temperature
measurement ranges from 0°C to 1,820°C (32°F to 3,308°F).
What are the main advantages of type R thermocouple bare wire?
Answer: R-type thermocouple bare wire has excellent linear
characteristics and stability and can provide high-precision
temperature measurement results.
In what application areas are S-type thermocouple bare wires
common?
Answer: S-type thermocouple bare wire is commonly used in
temperature measurement and control in the oil and gas industry,
furnace and heat treatment industry, and steel metallurgy.