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- Pyrotenax SX Compensating Cable is available for Type R (Platinum, 13 Percent Rhodium/Platinum) and Type S (Platinum, 10 Percent Rhodium/Platinum)
Thermocouples. The sheath material is copper and the conductors copper and copper-nickel (Alloy No.11)
- Often it is necesary to locate the thermocouple cold junction at some distance from the hot junction for reasons of engineering design, cost limitations
or safety. In other cases, the measuring circuit is installed permanently and the actual thermocouple is designed as a replaceable unit. It is then necessary
to have a connection cable between the thermocouple and the cold junction with the same thermoelectric properties as the thermocouple itself.
The connection between the thermocouple and the remote temperature indicator or controller can be made using either compensating or extension cable.
Extension cable uses conductors of the true thermocouple material (J, K, E, T, N, etc.) but with a less expensive outer sheath, since it will not be exposed to
the same high temperatures and harsh conditions as the thermocouple itself.
Compensating cable resembles the thermoelectric properties of the actual thermocouple type only over a limited range of ambient temperature (0°C to 80°C
typically). Since compensating cable is made with lower cost conductors (copper and copper-nickel alloy 11 is much lower cost than Platinum and Rhodium precious
metals), considerable savings can be made on plant installations compared with the cost of simply extending the R & S thermocouples.
- Particularly popular are our range of high accuracy R & S type compensating cables for extending precious metals thermocouples but with significantly lower costs.
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