| Model | Graduation Mark | Schematic diagram |
| WRNK-4313 WRNK-4314 WRNK-4315 WRNK-4316 | K |  |
| WREK-4313 WREK-4314 WREK-4315 WREK-4316 | E | |
| WRJK-4313 WRJK-4314 WRJK-4315 WRJK-4316 | J | |
| WRTK-4313 WRTK-4314 WRTK-4315 WRTK-4316 | T |
Note:
（1）Multipoint sheathed thermocouple's external dameter d（mm）is divided into four classes:Φ3,Φ4,Φ5 and Φ6.
（2）The ordinary multipoint thermocouple covers four specifications: thiple-point, four-point,five-point and six-point.
