| Cod Thermocwl | Math o Gyfrifiadur | Cadarnhaol | Negyddol | ||
| Enw | Cod | Enw | Cod | ||
| S | SC | Copr | SPC | Constantan 0.6 | SNC |
| R | RC | Copr | RPC | Constantan 0.6 | RNC |
| K | KCA | Haearn | KPCA | Constantan22 | KNCA |
| K | KCB | Copr | KPCB | Constantán 40 | KNCB |
| K | KX | Chromel10 | KPX | NiSi3 | KNX |
| N | NC | Haearn | NPC | Constantán 18 | NNC |
| N | NX | NiCr14Si | NPX | NiSi4Mg | NNX |
| E | EX | NiCr10 | EPX | Constantan45 | ENX |
| J | JX | Haearn | JPX | Constantán 45 | JNX |
| T | TX | Copr | TPX | Constantán 45 | TNX |
150 0000 2421