- Suitable with common pH-meters
- Monobloc combined probes (measurement + reference)
- Plug connectors S7 type
- Gel electrolyte without refilling (KCI 3.5M)
| Type | Parameter | Range | Element | Max. Pressure | Max. Temp | Junction | PG 13.5 |
| 9321 | pH | 0 to 12 pH | Glass | 6 bar | -30 to +30 °C | Ceramic (x3) | Fixed |
| 9308 RP | pH | 0 to 14 pH | Glass | 6 bar | -5 to +60 °C | Ceramic (x1) | Fixed |
| 9308 RP2 | pH | 0 to 14 pH | Glass | 10 bar | -5 to +70 °C | PTFE | Rotating |
| 9387 | pH | 0 to 14 pH | Glass | 10 bar | -5 to +100 °C | Ceramic (x1) | Fixed |
| 9318 RD | ORP | ±2000 mV | Platinum | 6 bar | -5 to +80 °C | Ceramic (x1) | Fixed |
| 9312 OR | ORP | ± 1500 mV | Gold (ring) | 2 bar | -5 to +70 °C | Ceramic (x1) | Rotating |
| 9326 F | pH | 0 to 12 pH | Glass | 6 bar | -5 to +60 °C | PTFE | Fixed |
When no specific mention applies, electrodes use a reference system as Ag/AgCl with a porous reference junction in ceramic: theoretical zero is at pH 7 (0 mV).
Theoretical gain is close to 58 mV per pH units (at 20°C). Fluids conductivity must be over 50 µS/cm.
In order to protect the electrode and to optimize the measurements, the industrial electrode can be fitted with an adapted electrode holder. Safe fitting and water tightness is ensured with a threaded connector type Pg13.5.
pH Combination electrodes
Glass and reference electrodes are always as a combination system. The measuring electrode is totally protected by the surrounding low resistance electrolyte from the reference electrode. The measuring area corresponds to special glass bulb end.
ORP Combination Electrodes
For these electrodes, the glass bulb is replaced by a metallic ring, in Platinum or Gold, according to the application. Gold ring electrodes are mainly used for ORP measurement in liquids containing cyanides.