Mettler Toledo pH/ORP Sensors with Gel, Liquid, and Polymer Electrolytes are used for measuring pH and oxidation-reduction potential in liquid measurement applications.
These sensors support analytical and process environments where acidity, alkalinity or redox conditions need to be measured as part of routine testing or in-line monitoring.
This product family includes electrode designs with different electrolyte configurations to support varying measurement needs, sample conditions and maintenance preferences.

Gel, liquid and polymer electrolyte options allow users to select a sensor style appropriate for the intended measurement environment, instrument compatibility and application requirements.
For laboratories and industrial facilities, pH/ORP sensors provide the measurement input needed to evaluate solution chemistry and monitor process conditions.
Selection should be based on the sample type, installation method, electrode construction, electrolyte type and operating conditions.
Key Characteristics
- pH and ORP sensor options for acidity, alkalinity and redox measurement
- Gel, liquid and polymer electrolyte configurations
- Electrode designs for laboratory and in-line industrial applications
- Options for different sample conditions and measurement routines
- Sensor compatibility with appropriate meters, transmitters or analytical systems
- Product selection based on measurement environment, sample characteristics and maintenance requirements
Ideal Applications
- pH measurement in liquid samples
- ORP/redox measurement where applicable
- Laboratory analytical testing
- In-line industrial measurement
- Routine solution chemistry checks
- Process measurement applications requiring compatible pH or ORP sensor selection
Product Family Includes
- pH sensors with gel electrolyte
- pH sensors with liquid electrolyte
- pH sensors with polymer electrolyte
- ORP/redox sensor options
- Laboratory pH electrodes
- In-line pH probes
- Sensors for use with compatible analytical meters, transmitters and measurement systems
Industries Served
- Chemical Processing
- Food and Beverage
- Semiconductor Manufacturing
- Water Treatment
- Wastewater Treatment
- Laboratory and Analytical Testing Environments







