These pH combination electrodes are designed for applications in the chemical industry where minimum contamination and reliable measurement are essential. Depending on the reference system and junction design, they are suitable for stable media and pure aqueous solutions.
pH electrodes with gel or polymer electrolyte
Electrodes with a KPG annular gap junction offer high chemical resistance and are particularly suitable for stable media. The controlled electrolyte outflow minimizes contamination and ensures a long service life.
For pure aqueous solutions, variants with a ceramic junction are available. Where a faster response time is required, models with a triple ceramic junction provide improved measurement performance.
- Minimum contamination of the process medium
- High chemical resistance and long lifetime
- Variants for stable and pure aqueous media
The pH combination electrodes with gel or polymer electrolyte feature a glass shaft (12 mm diameter) and a screw plug head (ATEX II 1/2G), with variants available with KPG annular gap, ceramic junction or triple ceramic junction designs.
Models:
Electrodes with KPG annular gap junction
The following models feature Referid® electrolyte, SILAMID® reference system, dome membrane and a measuring range of 2...13 pH:
- H 8181 HD – H glass, length 170 mm, 0...+100 °C
- H 8281 HD – H glass, length 120 mm, 0...+100 °C
- H 8381 HD – H glass, length 320 mm, 0...+100 °C
- H 8481 HD – H glass, length 225 mm, 0...+100 °C
- L 8281 HD – A glass, length 120 mm, -5...+80 °C, 2...12 pH
Electrodes with ceramic junction and gel electrolyte
The following model features gel electrolyte, SILAMID® reference system, sphere membrane, A glass and a measuring range of 2...12 pH, -5...+80 °C:
- L 7781 HD – ceramic junction, length 120 mm
Electrodes with triple ceramic junction and gel electrolyte
The following models feature gel electrolyte and a triple ceramic junction:
- A 7781 HD – A glass, sphere membrane, length 120 mm, 0...14 pH, -5...+80 °C
- A 7781-225 HD – A glass, sphere membrane, length 225 mm, 0...14 pH, -5...+80 °C
- H 7381 – H glass, cylinder membrane, length 120 mm, 2...13 pH, -5...+100 °C
Other pH electrodes
Electrodes including temperature measurement are also available with:
- Pt100 – see product page
- Pt1000 – see product page
- Memosens – see product page
Electrodes without temperature measurement are also available with liquid or KCl electrolyte – see product page.
Electrodes without temperature measurement are also available without electrolyte – see product page.