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YOKOGAWA PROCESS ANALYSIS
PH4F
PH4F-120-10E-N
HF-RESISTANT pH SENSOR
The PH4F is designed for pH measurement in liquids containing hydrofluoric acid. Its special sensing membrane and polymer electrolyte reference system are suited to demanding process environments where conventional pH sensing arrangements may be unsuitable. |
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DESIGN LOGIC
Built around
HF-containing media The PH4F uses a special sensing membrane for measurement of solutions or drainage containing hydrofluoric acid.
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REFERENCE SYSTEM
Polymer electrolyte + KCl
The polymer electrolyte reference arrangement incorporates KCl and uses two open-junction points. The relatively large junction opening is designed to reduce the tendency toward clogging in demanding process liquids. |
PROCESS WINDOW
HF concentration limits:
pH 2 → up to 500 ppm
pH 3 → up to 1,000 ppm pH 4 → up to 10,000 ppm pH 5 and above → no upper limit specified |
| APPLICATION FIELD | Chemical processing • Petrochemical environments • Industrial wastewater • Dye manufacturing • Paper manufacturing • Sugar manufacturing |
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DIRECT CONTACT
Need PH4F-120-10E-N?
Send the part number and required quantity for a direct quotation.
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Can PH4F-120-10E-N be used when HF is present in the process liquid?
Yes. PH4F is specifically designed for pH measurement in solutions or drainage containing hydrofluoric acid. The specified pH range is 2 to 11, with HF concentration limits varying with pH.
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What process-temperature range applies to PH4F-120-10E-N?
The specified measuring temperature is 0 to 80°C. PH4F therefore needs to be evaluated against the actual process temperature rather than being treated as interchangeable with other PH4/OR4 sensor variants.
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What does the PH4F-120-10E-N configuration mean for replacement planning?
The model is built around a 120 mm insertion length. The -10 configuration corresponds to approximately 10 m of cable, while terminal type E is the pin-terminal cable configuration used with compatible Yokogawa analyzers. The N designation is the specified no-adapter option.
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Why does PH4F-120-10E-N use a polymer electrolyte reference system?
The PH4F uses a polymer electrolyte containing KCl and two open-junction points. The junction opening is relatively large, helping reduce clogging tendencies in process liquids where contamination can affect conventional reference junction arrangements.
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How should PH4F-120-10E-N be evaluated against a PH4FT configuration?
PH4F is the HF-resistant sensor without an integrated RTD. PH4FT is the corresponding HF-resistant sensor with Pt1000 temperature measurement. When process temperature varies and automatic temperature measurement is required, the PH4FT or an appropriate PH4F temperature-sensor arrangement should be considered according to the application configuration.
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PH4 / OR4 FAMILY
Select by process condition
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ORDER SUPPORT
After-sales care
We aim to keep every transaction clear and practical, from quotation through delivery and post-receipt support. |
Return / Replacement Policy
Please contact us within 7 days if you have any question after you receiving the items.
The returned items has to be in their original condition with a specific reason for the return. We will issue a return or replacement for your order after we receive the returned items.
The buyer is responsible for all shipping costs incurred.
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