Suitable for ultra-low conductivity down to 0.2 μS/cm
Low temperature & pure water · XF268 Refillable
Refillable ultra-pure-water pH sensor
A refillable pH sensor for ultra-low-conductivity, high-temperature pure water in power, boiler-feed and condensate systems down to 0.2 μS/cm.
Down to 0.2 μS/cmRefillable electrolyte0–130°C
Structured from the current technical file
The values below come from the current model file. Final housing, membrane, cable, insertion depth, interface and accessories are controlled by the configured project datasheet.
01
Construction and product highlights
Refillable electrolyte system for extended service life
Continuous operation up to 130°C
Double-junction reference design
Customizable insertion length
Cable length can be extended up to 60 m
02
Verified technical specifications
Confirm the water chemistry, continuous and peak temperature, pressure, mounting, insertion depth, cable length and controller interface before ordering.
- Measurement range
- 0–14 pH
- Operating temperature
- 0–130 °C
- Pressure range
- 0–3 bar, 6 bar max
- Temperature compensation
- PT1000 / NTC10K (optional)
- Factory slope
- >95%
- Zero point
- 7 ± 0.25 pH
- Response time
- <30 s
- Reference electrolyte
- GFT polymer gel (low-conductivity, high-temperature type)
- Protection rating
- IP68
- Housing material
- PPS / PTFE (optional)
- Minimum conductivity
- 0.2 μS/cm
03
Recommended process fit
Power generation
For ultra-low-conductivity water where long-term stability is required.
Boiler feedwater
Refillable construction for demanding high-purity water service.
Condensate
Continuous pH monitoring down to the verified conductivity limit.
High-temperature pure water
For low-ionic-strength systems up to the verified temperature limit.
04
Items to confirm
To avoid selecting the wrong electrode, provide the real process conditions instead of only the pH range.
- 01Water matrix and main chemical components
- 02Continuous and peak temperature and pressure
- 03Mounting, insertion depth and cable length
- 04Temperature compensation, controller and communication interface
05
Installation drawing
This drawing comes from the current technical file. Some models may share a housing illustration; confirm the final configured dimensions before ordering.
06
Project documents available on request
After receiving the process conditions, we prepare the current configured documents for the selected model. Unverified certificates or customer references are not presented as standard claims.
Get a quote- Configured technical datasheet→
- Installation and dimension confirmation→
- Cable, interface and accessory schedule→
- Project quotation→
07
Related models in this family
Low-temperature pH electrode
View product↗
High-temperature pure-water pH sensor
View product↗08
Model confirmation
Can I order directly from the values on this page?+
The page supports preliminary selection. Final housing, membrane, cable, dimensions, temperature compensation and controller interface must be confirmed before ordering.
What is needed for an accurate quotation?+
Send the water chemistry, temperature, pressure, mounting, cable, interface, quantity and destination so the complete configuration can be quoted.
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.