Liquid Soap Level Detection
| Mfr. Part No. | Description |
| QS18UNA | 50 mm to 500 mm, IP67, 4-wire, 2 m cable with shield, 12-30 V dc, NPN |
| QS18UPA | 50 mm to 500 mm, IP67, 4-wire, 2 m cable with shield, 12-30 V dc, PNP |
| QS18UNAE | 50 mm to 500 mm, IP68, 4-wire, 2 m cable with shield, 12-30 V dc, NPN |
| QS18UPAE | 50 mm to 500 mm, IP68, 4-wire, 2 m cable with shield, 12-30 V dc, PNP |