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YOKOGAWA

Yokogawa Electric Corporation

FAQ (Q&A) - pH/ORP Analyzers -

Frequently-asked questions - pH/ORP Analyzers -

General

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pH Sensors

Q1 What types of pH sensors are available, and how are they selected?
Q2 What is the difference between the KCl non-replenish-type and the KCl replenish-type?
Q3 How should pH sensors be stored, and for how long?
Q4 What are the different types of glass electrode, and how should they be selected?
Q5 What are the different types of liquid junction, and how should they be selected?
Q6 What are the concentration and consumption of the internal solution (KCl solution)?
Q7 How safe is the internal solution (KCl solution)?
Q8 How should the earth electrode be selected according to its material?
Q9 What materials are used for the O-ring for pH sensors and how should they be selected?
Q10 What lengths of sensor cable are available?
Q11 What is the shape of the cable terminals of pH sensors and applicable analyzers?
Q12 What are the different types of KCL reserve tank and how should they be selected?
Q13 What methods are available for cleaning pH sensors and how are they selected?
Q14 Solid electrolyte pH sensors
Q15 pH sensors for chemical processes
Q16 Hydrofluoric acid-resistive pH sensors
Q17 When the cable length of the pH sensor is long, how can it be shortened? And if the cable is short, how can it be lengthened with another cable?
Q18 If the PH8EFP and PH8ERP are not going to be used for several months, how should they be stored?
Q19 When storing the glass electrode and liquid junctions of the PH8EFP and PH8ERP sensors as spares, how should they be saved and for how long can they be stored?
Q20 How often should maintenance be done?
How often should the PH8EFP KCL be replenished? How often should it be calibrated?
Q21 Is it possible to replace the glass electrodes and replenish the internal liquids of the HA405 xerolyt, HF405 anti-hydrofluoric acid sensor, and DPA405 pH sensor for a chemical process?
Q22 There are two kinds of electrodes, "Gold" and "Platinum" in the OR8EFG and OR8ERG. How should they be used differently?

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pH Holders

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PH100 Panel Mount pH Analyzer

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PH450G 4-Wire pH/ORP Analyzer

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Personal pH Meter (PH71/PH72)