Chemical Sensors | Inline pH Sensors

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!