The Agilent Technologies P3111 pH electrode is designed to use with R8111 electrodes. Application: Must be used with R8111 Reference electrode (5190-4003) This product is only available to U.S. Domestic Customers. For research use only, not to be used in diagnostic procedures.

The Agilent Technologies P3311 pH triode combination electrode comes with refilling solution and delivers great and accurate results in chemical laboratories. This product is only available to U.S. Domestic Customers. For research use only, not to be used in diagnostic procedures.

The Agilent Technologies P3211 pH combination electrode comes with 30 mL refilling solution and delivers great and accurate results in chemical laboratories. This product is only available to U.S. Domestic Customers. For research use only, not to be used in diagnostic procedures.