| Cat. No. | Type | Description | PK | |
|---|---|---|---|---|
| 6051958 | LS 12 | Stands for 12 COD air coolers | 1 | |
| 6052519 | KW 12/N | Cooling trough for E 12/B insert frame | 1 | |
| 6089903 | KW 24/N | Cooling trough for E 12/BV insert frame | 1 | |
| 9920706 | KW 6 /N | Cooling trough for E 6/B insert frame | 1 | |
| 9920723 | LS 6 | Stands for 6 COD air coolers | 1 |
The cooling trough prevents the overheating of the COD samples during the critical addition of sulphuric acid. In addition, it is used to cool the samples after the heating phase.