Type R Thermocouple (Platinum Rhodium -13% / Platinum):
The Type R is used in very high temperature applications. It has a
higher percentage of Rhodium than the Type S, which makes it more
expensive. The Type R is very similar to the Type S in terms of
performance. It is sometimes used in lower temperature applications
because of its high accuracy and stability. Type R has a slightly
higher output and improved stability over the type S.
Type R, S, and B thermocouples are "Noble Metal" thermocouples,
which are used in high temperature applications.
Type S thermocouples are characterized by a high degree of chemical
inertness and stability at high temperatures. Often used as a
standard for calibration of base metal thermocouples.
Platinum rhodium thermocouple(S/B/R TYPE)
Platinum Rhodium Assembling Type Thermocouple is widely used in
production places with high temperature. It is mainly used to
measure temperature in glass and ceramic industry and industrial
salting.
Insulation material: PVC, PTFE, FB or as per the customer's
requirement.
Type R Temperature Range:
- Thermocouple grade wire, -58 to 2700F (-50 to 1480C)
- Extension wire, 32 to 392F (0 to 200C)
Accuracy (whichever is greater):
- Standard: +/- 1.5C or +/- .25%
- Special Limits of Error: +/- 0.6C or 0.1%
Consideration for bare wire type R thermocouple applications:
- Heating - Gas burners for ovens
- Cooling - Freezers
- Engine protection - Temperatures and surface temperatures
- High temperature control - Iron casting
| Code | Wires component of the thermocouple |
| +Positive leg | -Negative leg |
| N | Ni-cr-si (NP) | Ni-si-magnesium (NN) |
| K | Ni-Cr (KP) | Ni-Al(Si) (KN) |
| E | Ni-Cr (EP) | Cu-Ni<constantan> (EN) |
| J | Iron (JP) | Cu-Ni<constantan> (JN) |
| T | Copper (TP) | Cu-Ni<constantan> (TN) |
| B | Platinum Rhodium-30% | Platinum Rhodium-6% |
| R | Platinum Rhodium-13% | Platinum |
| S | Platinum Rhodium-10% | Platinum |
| 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 |
Wire: 0.1 to 8.0 mm.
| Diameter/mm | Type | Long time Working | Short period Working | | temperature/°C | temperature/°C | | 0.5 | S | 1300 | 1600 | | 0.5 | R | 1300 | 1600 | | 0.5 | B | 1600 | 1700 |
|
| Conductor Name | Polarity | Code | Pt% | Rh% | | Pt90Rh | Positive | SP | 90 | 10 | | Pt | Negative | SN,RN | 100 | -- | | Pt87Rh | Positive | RP | 87 | 13 | | Pt70Rh | Positive | BP | 70 | 30 | | Pt94Rh | Negative | BN | 94 | 6 |
|
