What is Redox?

The terms are interchangeable in meaning: Redox = Oxidation-Reduction Potential (ORP). The term Redox is more commonly used for bioprocess applications in Europe and the U.S. The term ORP is more commonly used for industrial chemical process applications in the U.S. The redox potential of a media is related to…

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Why do you measure Redox in fermentation media?

The metabolic activity of microorganisms depends on many factors, including the redox potential of the culture environment. Measuring the redox potential allows the vessel operator to monitor the addition of reducing agents while ensuring that the potential is in the proper range for initiation of growth. It is also important…

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How do I select a FermProbe pH electrode?

FermProbe® pH Electrodes with T-Pull® Cap The T-Pull cap eases installation and removal of the electrode from the housing and greatly reduces fatigue of the extension cable. The electrode can be removed from the housing without rotating the electrode and twisting the cable, further reducing cable fatigue. Features: Rugged T-Pull…

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What is the difference between the pH electrode cap styles?

T-Pull Cap The T-Pull handle eases installation and removal of the electrode from the housing and greatly reduces fatigue of the extension cable. The electrode can be removed from the housing without rotating the electrode and twisting the cable. Also, the retainer nut is part of the handle and cannot…

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How do I match electrodes to housings?

Housings and FermProbe® pH electrodes are offered in a variety of lengths. This enables fermentation operators to select the optimum insertion length for the application at hand. The housing ordering information box lists the suitable electrode models and lengths for each particular housing style. There is another way to match…

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How do I change an OxyProbe II Membrane Cartridge?

There are two distinct types of 12 mm DO sensor cartridges: one for the traditional style sensor (for example, OxyProbe D140) and one for the newer style OxyProbe II sensors. Please make sure you received the right membrane cartridge for your particular sensor design. The old and new membranes are not…

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How do I choose the right membrane cartridge for my sensor?

Membrane Cartridge Selection If your sensor cathode looks like this Broadley James OxyProbe II Broadley James OxyProbe   Broadley James OxyProbe Mettler Toledo® Ingold® Mettler Toledo® Ingold® Mettler Toledo® Ingold® Use this membrane cartridge model OxyProbe II   OxyProbe (12mm) OxyProbe (25mm)  

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How do I change a membrane cartridge on a 19mm and 25mm Probe?

Step 1 While holding the membrane cartridge upright (with opening up) in one hand, carefully pour the electrolyte from the bottle into the cartridge until approximately 75% full. Remove any entrapped air bubbles by tapping on the side of the membrane housing. Try not to spill any of the electrolyte…

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How do I change a membrane cartridge on a 12mm DO Probe?

Step 1 While holding the membrane cartridge upright (with opening up) in one hand, carefully pour the electrolyte solution from the bottle into the cartridge until level is approximately 1/8″ (3 mm) from the top edge of the cartridge. Remove any entrapped air bubbles by gently tapping on the side…

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How do I test my pH electrode?

pH Electrode Test Procedure The purpose of this test is to determine if a pH electrode is functioning within acceptable limits. The asymmetry potential (A.P) and slope (efficiency) can be used as guidelines to judge an electrode’s performance. Typically an electrode is replaced when the A.P is greater than ±20…

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