psl-rheotek U型管逆流粘度计，适用于测量不透明液体;总长度275毫米;样品体积约12-25毫升，配有ISO 17025校准证书。
| Part No. | Size | Constant | Range (mm²/s) |
| 1637/01 | 1 | 0.003 | 0.6 to 3 |
| 1637/02 | 2 | 0.01 | 2 to 10 |
| 1637/03 | 3 | 0.03 | 6 to 30 |
| 1637/04 | 4 | 0.1 | 20 to 100 |
| 1637/05 | 5 | 0.3 | 60 to 300 |
| 1637/06 | 6 | 1.0 | 200 to 1,000 |
| 1637/07 | 7 | 3.0 | 600 to 3,000 |
| 1637/08 | 8 | 10 | 2,000 to 10,000 |
| 1637/09 | 9 | 30 | 6,000 to 30,000 |
| 1637/10 | 10 | 100 | 20,000 to 100,000 |
| 1637/11 | 11 | 300 | 60,000 to 300,000 |
