| Producer | ETATRON D.S. |
| Power supply | 1х220 V, 50 Hz |
| Control | Microprocessing |
| Measuring parameters | 3 |
| Measuring parameters | pH-Rx-Cl-CD |
| Serial number of the controller | eSELECT |
Download instructions, catalog for Controller eSelect B4 (pH, Rx, Cl, CD) 100-250V, for 3 parameters