| Model | 389 | pH/ORP sensor |
| Preamplifier cable | 01 | Integral preamplifier, 25-ft. (7,6 m) cable |
| Combination electrode | 10 | pH: general purpose low resistivity glass |
| Transmitter/thermocouple compatibility | 55 | For Rosemount 56, 1056, 1057, 1066, and 5081, use codes -01, -03, -04, -05, and -06 only |