Hamilton pH Sensor EasyFerm Plus PHI VP 120 Pt100

Hamilton 238633-1111 EasyFerm Plus PHI VP 120 pH Sensor – Pt100, 120 mm

The Hamilton 238633-1111 EasyFerm Plus is a high-performance, steam-sterilizable pH sensor designed specifically for the rigorous demands of pharmaceutical, biotechnology, and food/beverage fermentation. Utilizing Hamilton's proprietary PHI glass and a pre-pressurized Phermlyte reference electrolyte, this sensor is engineered to withstand repeated Clean-In-Place (CIP) and Sterilization-In-Place (SIP) cycles without suffering from reference poisoning or signal drift. The 120 mm shaft length is ideal for direct insertion into benchtop bioreactors and smaller fermentation vessels. Equipped with an integrated Pt100 temperature sensor and a watertight VarioPin (VP) connector, the EasyFerm Plus ensures continuous, highly accurate pH monitoring and automatic temperature compensation in dynamic cell culture environments.

Technical Performance and Design

• Pre-Pressurized Reference System: The internal Phermlyte electrolyte is pressurized to prevent the ingress of culture media, proteins, and sulfides into the ceramic diaphragm, effectively eliminating reference clogging and ensuring long-term stability.

• PHI Glass Membrane: Engineered to provide exceptional chemical resistance and maintain a rapid response time even after numerous high-temperature autoclaving and SIP cycles (up to 140°C).

• Integrated Pt100 RTD: Features a built-in Pt100 temperature sensor for instantaneous Automatic Temperature Compensation (ATC), a critical requirement for maintaining optimal pH setpoints during exothermic biological processes.

• VarioPin (VP) Connector: Utilizes a robust, waterproof multi-pin VP 6 connection that securely transmits both the pH millivolt signal and the temperature data through a single cable to the bioreactor controller.

Product Specifications

• Catalog Number: 238633-1111

• pH Range: 0 to 14 pH

• Shaft Length: 120 mm (a-length)

• Shaft Diameter: 12 mm

• Temperature Range: 0°C to 140°C (Sterilizable/Autoclavable)

• Temperature Sensor: Pt100

• Connector: VP 6 (VarioPin)

Key Benefits & Applications

• Benchtop Bioreactor Integration: The 120 mm length and standard Pg13.5 compatible threading make it a direct fit for standard ports on leading bioreactors and fermenters (e.g., Eppendorf, Sartorius, Applikon).

• Aseptic Manufacturing: Built for GMP-regulated environments where probes must be repeatedly sterilized in place without removal, significantly reducing the risk of vessel contamination.

• Cell Culture & Fermentation: Delivers the precision necessary for tightly controlled mammalian cell cultures and high-density microbial fermentations where even minor pH drift can ruin a valuable batch.

• Low Maintenance: The pressurized liquid electrolyte system requires no refilling, functioning as a reliable, long-life consumable for process development laboratories.

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