Silver Ion Trap Reference System plus Protelyte Electrolyte - The PHE-12 pH/Temperature Electrode uses a Silver Ion Trap reference system and Protelyte reference solution. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked or contaminated by proteins. The rugged blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact; and can be tested in high-temperature samples (up to 225°F). Patented pH/Temperature combination structure - The temperature element is placed in an independent cavity under the pH glass membrane. With the built-in heat conducting medium, the temperature sensing speed can be increased by 40%, hence the response time and stability of the pH electrode are greatly improved. The electrode uses a BNC/RCA connector, compatible with all labForce® pH meters. This is a replacement electrode for the TS-D200 portable pH meter.