PFA Battery Test Cell – 3-Electrode, 1/4″
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Reusable 1/4″ PFA battery test cell for three-electrode measurements
The S4R 1/4″ three-electrode battery test cell is a reusable laboratory platform providing three independently accessible metallic electrode contacts within a chemically resistant PFA architecture. The compact nominal 1/4″ working format supports electrodes up to Ø 6.3 mm while retaining direct electrical access and spring-assisted contact on the primary axial stack.
The additional electrode port extends the experimental flexibility of the standard two-terminal geometry without sacrificing access to the internal stack, allowing repeated assembly, cleaning, contact-material selection and post-test inspection within the same reusable cell hardware.
Designed for controlled three-electrode experiments
A reusable 1/4″ platform combining three independent electrode connections, maintained axial stack contact and configurable metallic interfaces.
Three independent contacts
Three separately accessible metallic electrode contacts support experimental protocols requiring an additional independently wired electrode.
Compact 1/4″ working format
Accommodates electrodes up to Ø 6.3 mm while reducing electrolyte volume and supporting compact laboratory test assemblies.
Maintained axial stack contact
An internal spring helps maintain axial stack contact across stacks up to 5 mm thick as the assembly relaxes or changes dimension during cycling.
Selectable plunger materials
SS316, aluminium or titanium contacts are available so the same material family can be selected for all three metallic interfaces.
Three-port PFA body for electrochemical test environments
The cell incorporates a PFA body component manufactured by Swagelok Company within an independently assembled S4R battery-test architecture. PFA is a fully fluorinated polymer valued for broad chemical resistance, low surface energy and electrical insulation, making it suitable for many aqueous and non-aqueous electrolyte systems encountered in laboratory electrochemistry.
The nominal 1/4″ internal format provides a useful diameter of 1/4″ (6.35 mm) and is specified for electrodes up to Ø 6.3 mm. The three-port body can be fully disassembled, giving direct access to the primary stack and the additional electrode interface for loading, cleaning and experimental reconfiguration.
Three independently accessible metallic plungers
The cell provides three metallic electrode contacts. The two opposed plungers close the primary electrochemical stack and transmit the axial load generated by the compression assembly, while the third plunger provides an additional, independently wired electrode interface. The same selectable material family is used for all three contacts: SS316 stainless steel, aluminium or titanium, according to the experimental chemistry and potential window.
Spring-loaded compression of the primary stack
The internal spring applies a preload along the main cell axis and helps maintain mechanical and electrical contact between the opposed electrodes, the separator or electrolyte layer and the metallic interfaces as the stack relaxes or changes dimension during cycling. Maintaining stable contact reduces one source of variation in measured cell resistance.
Removable spacers set the working length of the axial assembly. The cell accepts stack thicknesses up to 5 mm, while the third electrode contact remains independently positioned outside the primary compression axis.
PFA compression-ferrule sealing on three ports
Each electrode port uses a PFA compression nut and ferrule assembly corresponding to the body component. Tightening the nut compresses the ferrule around the metallic contact, providing the mechanical seal while retaining the plunger at the position established during assembly.
Three independent electrical connections
Each metallic plunger contains a transverse Ø 2.0 mm connection port for standard 2 mm banana plugs. The three contacts can therefore be wired independently to the measurement instrument using conventional laboratory leads, with all electrical connections remaining outside the sealed cell volume.
The two opposed contacts define the main axial electrochemical stack. The third contact provides an additional electrode connection whose functional role is set by the experimental protocol. The cell therefore provides three independently accessible metallic interfaces while allowing electrode roles to be defined by the experimental protocol.
When operated in a conventional three-electrode configuration, the three electrical channels are assigned to working, counter and reference functions according to the electrode materials and experimental protocol. The cell hardware provides the three independent connections but does not prescribe those electrochemical roles.
This architecture is intended for laboratory studies in which an additional independently connected electrode is required while retaining a reusable 1/4″ PFA test-cell format and direct access to all metallic contacts.
Reusable three-port assembly for repeated experiments
The cell combines a three-port PFA body, three compression assemblies, three metallic contacts and the spring-and-spacer system used to maintain the primary axial stack. Each element remains accessible after testing, allowing electrode recovery, cleaning and experimental reconfiguration without replacing the complete cell hardware.
Plunger material, stack thickness and the role of the third electrode contact can be adapted while retaining the same 1/4″ body geometry. This is particularly useful for comparative experimental series where hardware geometry should remain constant from one test to the next.
For related test architectures, the 1/2″ PFA three-electrode battery test cell provides a larger working format, the 1/4″ PFA two-electrode battery test cell provides the corresponding two-terminal geometry, and the 1/4″ SS316 three-electrode battery test cell provides a stainless-steel body alternative.
Reference dimensions
The original S4R technical drawing is retained to preserve the detailed geometry of the assembled three-electrode cell. The values below summarize the dimensions most relevant to installation and electrode selection.
Technical specifications
Reference data for the 1/4″ three-electrode PFA battery test cell.
| Parameter | Specification |
|---|---|
| Cell type | Reusable PFA battery test cell, three-electrode configuration |
| Electrode configuration | Three independently accessible metallic electrode contacts |
| Nominal format | 1/4″ |
| Useful internal diameter | 1/4″ (6.35 mm nominal) |
| Recommended max. electrode diameter | Ø 6.3 mm |
| Maximum stack thickness | 5 mm |
| Maximum validated temperature | 100 °C |
| Body material | PFA body component (Swagelok) with PFA compression hardware |
| Sealing system | PFA compression nuts and ferrules on three electrode ports |
| Plunger materials | SS316, aluminium or titanium, according to the selected configuration |
| Compression system | Internal spring with removable adjustment spacers acting on the primary axial stack |
| Electrical connection | Transverse Ø 2.0 mm port on each metallic contact for standard 2 mm banana plugs |
| Overall assembled length | 84 mm |
| Overall assembled height | 52.5 mm |
| Body height | 18.5 mm |
| End diameter shown on drawing | Ø 6.3 mm |
| Construction | Fully disassemblable and reusable for sample loading, electrode recovery, cleaning and reconfiguration |
| Typical applications | Battery-material studies, supercapacitor research and experiments requiring three independently connected electrodes |
Included components
Supplied as a complete three-electrode assembly according to the selected metallic-contact configuration.
Selecting and operating the 1/4″ three-electrode configuration
What is the maximum recommended electrode diameter?
The recommended maximum electrode diameter is Ø 6.3 mm, corresponding to the nominal 1/4″ useful internal format of this configuration.
What is the purpose of the third electrode contact?
It provides an additional independently wired metallic electrode interface. In a conventional three-electrode experiment, the three electrical channels are assigned to working, counter and reference functions according to the experimental protocol; the hardware itself does not impose those roles.
Which plunger materials are available?
SS316 stainless steel, aluminium and titanium are available. The selected material should be compatible with the electrolyte, temperature and potential window used in the experiment.
Is the third contact part of the axial stack compression?
No. The spring-assisted preload acts along the main axis between the two opposed plungers. The third electrode contact is independently positioned outside this primary compression axis.
Before use
Operating limits
The maximum validated temperature applies to the complete assembly. The practical operating envelope is set by the lowest-rated component and by the chemical system under test.
Material compatibility
Compatibility between the electrolyte, PFA components and selected plunger material should be assessed for the solvent, salt, concentration, temperature and potential window used.
Assembly and maintenance
Ferrules, sealing surfaces and metallic contacts should be inspected during routine maintenance and cleaned using procedures compatible with the materials and chemistry used.
Reusable 1/4″ PFA battery test cell for three-electrode measurements
The S4R 1/4″ three-electrode battery test cell is a reusable laboratory platform providing three independently accessible metallic electrode contacts within a chemically resistant PFA architecture. The compact nominal 1/4″ working format supports electrodes up to Ø 6.3 mm while retaining direct electrical access and spring-assisted contact on the primary axial stack.
The additional electrode port extends the experimental flexibility of the standard two-terminal geometry without sacrificing access to the internal stack, allowing repeated assembly, cleaning, contact-material selection and post-test inspection within the same reusable cell hardware.
Designed for controlled three-electrode experiments
A reusable 1/4″ platform combining three independent electrode connections, maintained axial stack contact and configurable metallic interfaces.
Three independent contacts
Three separately accessible metallic electrode contacts support experimental protocols requiring an additional independently wired electrode.
Compact 1/4″ working format
Accommodates electrodes up to Ø 6.3 mm while reducing electrolyte volume and supporting compact laboratory test assemblies.
Maintained axial stack contact
An internal spring helps maintain axial stack contact across stacks up to 5 mm thick as the assembly relaxes or changes dimension during cycling.
Selectable plunger materials
SS316, aluminium or titanium contacts are available so the same material family can be selected for all three metallic interfaces.
Three-port PFA body for electrochemical test environments
The cell incorporates a PFA body component manufactured by Swagelok Company within an independently assembled S4R battery-test architecture. PFA is a fully fluorinated polymer valued for broad chemical resistance, low surface energy and electrical insulation, making it suitable for many aqueous and non-aqueous electrolyte systems encountered in laboratory electrochemistry.
The nominal 1/4″ internal format provides a useful diameter of 1/4″ (6.35 mm) and is specified for electrodes up to Ø 6.3 mm. The three-port body can be fully disassembled, giving direct access to the primary stack and the additional electrode interface for loading, cleaning and experimental reconfiguration.
Three independently accessible metallic plungers
The cell provides three metallic electrode contacts. The two opposed plungers close the primary electrochemical stack and transmit the axial load generated by the compression assembly, while the third plunger provides an additional, independently wired electrode interface. The same selectable material family is used for all three contacts: SS316 stainless steel, aluminium or titanium, according to the experimental chemistry and potential window.
Spring-loaded compression of the primary stack
The internal spring applies a preload along the main cell axis and helps maintain mechanical and electrical contact between the opposed electrodes, the separator or electrolyte layer and the metallic interfaces as the stack relaxes or changes dimension during cycling. Maintaining stable contact reduces one source of variation in measured cell resistance.
Removable spacers set the working length of the axial assembly. The cell accepts stack thicknesses up to 5 mm, while the third electrode contact remains independently positioned outside the primary compression axis.
PFA compression-ferrule sealing on three ports
Each electrode port uses a PFA compression nut and ferrule assembly corresponding to the body component. Tightening the nut compresses the ferrule around the metallic contact, providing the mechanical seal while retaining the plunger at the position established during assembly.
Three independent electrical connections
Each metallic plunger contains a transverse Ø 2.0 mm connection port for standard 2 mm banana plugs. The three contacts can therefore be wired independently to the measurement instrument using conventional laboratory leads, with all electrical connections remaining outside the sealed cell volume.
The two opposed contacts define the main axial electrochemical stack. The third contact provides an additional electrode connection whose functional role is set by the experimental protocol. The cell therefore provides three independently accessible metallic interfaces while allowing electrode roles to be defined by the experimental protocol.
When operated in a conventional three-electrode configuration, the three electrical channels are assigned to working, counter and reference functions according to the electrode materials and experimental protocol. The cell hardware provides the three independent connections but does not prescribe those electrochemical roles.
This architecture is intended for laboratory studies in which an additional independently connected electrode is required while retaining a reusable 1/4″ PFA test-cell format and direct access to all metallic contacts.
Reusable three-port assembly for repeated experiments
The cell combines a three-port PFA body, three compression assemblies, three metallic contacts and the spring-and-spacer system used to maintain the primary axial stack. Each element remains accessible after testing, allowing electrode recovery, cleaning and experimental reconfiguration without replacing the complete cell hardware.
Plunger material, stack thickness and the role of the third electrode contact can be adapted while retaining the same 1/4″ body geometry. This is particularly useful for comparative experimental series where hardware geometry should remain constant from one test to the next.
For related test architectures, the 1/2″ PFA three-electrode battery test cell provides a larger working format, the 1/4″ PFA two-electrode battery test cell provides the corresponding two-terminal geometry, and the 1/4″ SS316 three-electrode battery test cell provides a stainless-steel body alternative.
Reference dimensions
The original S4R technical drawing is retained to preserve the detailed geometry of the assembled three-electrode cell. The values below summarize the dimensions most relevant to installation and electrode selection.
Technical specifications
Reference data for the 1/4″ three-electrode PFA battery test cell.
| Parameter | Specification |
|---|---|
| Cell type | Reusable PFA battery test cell, three-electrode configuration |
| Electrode configuration | Three independently accessible metallic electrode contacts |
| Nominal format | 1/4″ |
| Useful internal diameter | 1/4″ (6.35 mm nominal) |
| Recommended max. electrode diameter | Ø 6.3 mm |
| Maximum stack thickness | 5 mm |
| Maximum validated temperature | 100 °C |
| Body material | PFA body component (Swagelok) with PFA compression hardware |
| Sealing system | PFA compression nuts and ferrules on three electrode ports |
| Plunger materials | SS316, aluminium or titanium, according to the selected configuration |
| Compression system | Internal spring with removable adjustment spacers acting on the primary axial stack |
| Electrical connection | Transverse Ø 2.0 mm port on each metallic contact for standard 2 mm banana plugs |
| Overall assembled length | 84 mm |
| Overall assembled height | 52.5 mm |
| Body height | 18.5 mm |
| End diameter shown on drawing | Ø 6.3 mm |
| Construction | Fully disassemblable and reusable for sample loading, electrode recovery, cleaning and reconfiguration |
| Typical applications | Battery-material studies, supercapacitor research and experiments requiring three independently connected electrodes |
Included components
Supplied as a complete three-electrode assembly according to the selected metallic-contact configuration.
Selecting and operating the 1/4″ three-electrode configuration
What is the maximum recommended electrode diameter?
The recommended maximum electrode diameter is Ø 6.3 mm, corresponding to the nominal 1/4″ useful internal format of this configuration.
What is the purpose of the third electrode contact?
It provides an additional independently wired metallic electrode interface. In a conventional three-electrode experiment, the three electrical channels are assigned to working, counter and reference functions according to the experimental protocol; the hardware itself does not impose those roles.
Which plunger materials are available?
SS316 stainless steel, aluminium and titanium are available. The selected material should be compatible with the electrolyte, temperature and potential window used in the experiment.
Is the third contact part of the axial stack compression?
No. The spring-assisted preload acts along the main axis between the two opposed plungers. The third electrode contact is independently positioned outside this primary compression axis.
Before use
Operating limits
The maximum validated temperature applies to the complete assembly. The practical operating envelope is set by the lowest-rated component and by the chemical system under test.
Material compatibility
Compatibility between the electrolyte, PFA components and selected plunger material should be assessed for the solvent, salt, concentration, temperature and potential window used.
Assembly and maintenance
Ferrules, sealing surfaces and metallic contacts should be inspected during routine maintenance and cleaned using procedures compatible with the materials and chemistry used.
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