Inline pH Sensors
Accurate and robust pH sensors for process analytics from Metroglas are designed with integrated temperature sensors and standard connector options. These sensors are low-maintenance and are characterized by stable measurement signals thanks to the use of pre-pressurized reference systems and maintenance-free electrolytes.
The optimized designs and proven materials used in the production of Metroglas sensors facilitate reliable measurement results even in harsh environments, during regular autoclaving, and sterilizations.
Key Benefits
- Reliable measurement results even after use in demanding operating conditions, frequent autoclaving, or sterilization cycles.
- Robustness ensured by carefully selected materials and proven technologies.
- Low maintenance and stable reading results over the entire sensor lifespan due to the use of pre-pressurized reference systems and maintenance-free electrolytes.
- Sustainable performance thanks to prevention of contamination by silver with the integrated silver ion trap.
Technical Specifications
| Model No. | 200 | 300 | 250 | 350 |
| Industry | Pharmaceuticals and Biotechnology | Pharmaceuticals and Biotechnology | Chemistry | Chemistry |
| Measuring Range | 0–12 pH | 0–12 pH | 0–14 pH | 0–14 pH |
| Membrane | HT glass | HT glass | H glass | H glass |
| Shaft Material | Glass | Glass | Glass | Glass |
| Diaphragm | Glass sleeve | Ceramic pin | Glass sleeve | Ceramic pin |
| Temperature Sensor | Pt1000 | Pt1000 | Pt1000 | Pt1000 |
| Electrolyte | Saturated KCl gel | Pre-pressurized gel (3M KCl) |
Pre-pressurized gel (3M KCl) |
Pre-pressurized gel (3M KCl) |
| Reference System | Ag/AgCl reference with Ag-scavenger |
Ag/AgCl reference with Ag-scavenger |
Ag/AgCl reference with Ag-scavenger | Ag/AgCl reference with Ag-scavenger |
| Temperature Range | 0 – 80 °C | 0 – 120 °C | 0 – 120 °C | 0 – 120 °C |
| High Temperature | <20 min 135°C | <20 min 135°C | <20 min 135°C | <20 min 135°C |
| Pressure | 1 bar | 4 bar (pre- pressurized) |
4 bar (pre-pressurized) | 4 bar (pre- pressurized) |
| Shaft Diameter | 12 mm | 12 mm | 12 mm | 12 mm |
| Sensor Connector | VarioPin, PG 13.5 | VarioPin, PG 13.5 | VarioPin, PG 13.5 | VarioPin, PG 13.5 |
| Output Signal | Analog or Digital | Analog or Digital | Analog or Digital | Analog or Digital |
| Min. Immersion Depth |
25 mm | 25 mm | 25 mm | 25 mm |
| Length (mm) | 120, 225, 325, 425 | 120, 225, 325, 425 | 120, 225, 325, 425 | 120, 225, 325, 425 |
| ATEX | No | No | on demand | on demand |
Learn More About Metroglas Sensors
Whether you need to measure pH values, determine dissolved oxygen (dO2), dissolved carbon dioxide (pCO2), or other parameters in the process, we can offer the right solution. Contact us to discuss your application and sensor requirements!
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