Process Sensors
AS4800Pressurized PTFE-junction pH Electrode
The AS4800 combines a layered electrolyte bridge, pressurized gel and PTFE annular junction for demanding chemical and contaminated media. Its pressure and temperature capability supports difficult industrial pH applications.
Technical overview
Published configuration data
Values below describe catalog or typical configurations. The confirmed quotation and model code define the supplied specification.
- Range
- 0-14 pH
- Temperature
- -5 to 130°C
- Pressure
- 0-7 bar at 130°C / 0-16 bar at 25°C
- Process connection
- PG13.5
- Junction
- PTFE annular diaphragm
- Lengths
- 120-425 mm and custom
Key characteristics
Why engineers consider AS4800
- Layered electrolyte bridge
- Pressurized sealed reference
- PTFE annular junction
- High pressure capability
Typical applications
Where it fits
- 01Strong oxidizers
- 02Solvent processes
- 03Acid and base streams
- 04Contaminated liquids
Selection checklist
Confirm these conditions before ordering.
Sending this information helps CurioSens verify the measurement principle, materials, range and interface.
- 01Measured parameter and expected range
- 02Process medium and possible contaminants
- 03Operating and cleaning temperature
- 04Operating pressure and pressure peaks
- 05Process connection and insertion length
- 06Transmitter, cable connector and temperature element
Engineer-reviewed FAQ
Questions about AS4800
Application answers reviewed for compatibility, selection, installation and maintenance.
What pressure ratings and design features are offered by the AS4800 Swiss-made pH electrode?+
The AS4800 is a high-specification pH electrode built in Switzerland for demanding chemical and industrial applications. It utilizes a layered electrolyte bridge that extends chemical diffusion distance, paired with a sealed reference element and pressurized gel. The external PTFE annular diaphragm resists fouling from oxidizers, solvents, and strong acids or bases. Pressure ratings are confirmed for 15 bar at 25°C, 12 bar at 100°C, and 7 bar at 130°C across a 0-14 pH range. Insertion lengths include 120mm, 225mm, 325mm, and 425mm with S8 or VP6 connectors. Chemical resistance against HF or concentrated hot alkalis must be confirmed for the selected configuration. Provide your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output to verify compatibility.
selectionHow do I choose between VP, S8, and AK9 cable connectors for my pH electrode installation?+
Selecting the correct electrode connector depends on sensor wiring and environmental sealing needs. The VP (VarioPin) multi-pole connector system (VP6/VP8) carries both high-impedance glass pH signals and integrated PT1000/PT100 temperature sensor lines in one shielded cable, providing IP68 moisture protection ideal for moist or steam-sterilized bioprocess vessels. Standard coaxial connectors like S8 (paired with AS9 cables) or K8S/K9 (paired with AK9 cables) connect single-variable pH signals, requiring separate temperature wiring if needed. Cable options include standard lengths from 1m to 30m. High-humidity environments mandate sealed VP connections. Exact pinouts must be confirmed for the selected configuration. Share your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output.
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