The Agilent Technologies Agilent P3211 and P3311 pH Combination Electrodes are used to measure pH in aqueous solutions. The refillable reference electrode helps to prolong the service life of the electrode. They are used with the 3200P pH Meter or similar meters. The P3211 consists of a pH-sensing electrode and reference electrode. The P3311 consists of a pH-sensing electrode, reference electrode, and temperature-sensing probe.
This document provides the operating instructions for the Agilent P3211 and P3311 Refillable pH Combination Electrodes. These electrodes are designed to measure pH in aqueous solutions and are compatible with the 3200P pH Meter or similar instruments. The P3211 model consists of a pH-sensing electrode and a reference electrode, while the P3311 includes an additional temperature-sensing probe.
| pH range | 0 to 14 |
|---|---|
| Zero potential | 7.00 ± 0.5 |
| Temperature range (P3211) | 0 to 80 ºC |
| Temperature accuracy | ± 0.5 °C |
| Probe impedance | < 300 Mohm |
| Reference type | Ag/AgCl |
| Body material | Glass |
| Probe diameter | 12 mm |
They are used with the 3200P pH Meter or similar meters.
For acidic sample solutions, use pH 4.00 and pH 7.00 standards.
Soak the measuring tip in a 0.1 mol/L HCl solution that contains 1% pepsin for 15 minutes.
Soak the sensitive membrane in 4% HF solution for 3 to 5 seconds, then rinse with HCl and water.