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S4R InertBridge™ — Vacuum Transfer Chamber for Air-Sensitive SEM Samples

https://www.s4r.fr/shop/s4r-lbe-lmc0001a-s4r-inertbridgetm-vacuum-transfer-chamber-for-air-sensitive-sem-samples-204 https://www.s4r.fr/web/image/product.template/204/image_1920?unique=cff4d79

The S4R InertBridge™ is a compact vacuum transfer chamber developed for the protected transfer of air-sensitive samples from a glovebox to a scanning electron microscope. Samples remain enclosed within an evacuated compartment during handling and transport, limiting their exposure to ambient oxygen, moisture, and laboratory contamination.

The chamber is evacuated and closed inside the glovebox. Under ambient conditions, the pressure differential across the cover maintains contact with the sealing interface. Once the InertBridge™ is installed inside the SEM and the microscope chamber is pumped down, the external pressure progressively decreases. When the resulting closing force becomes lower than the force exerted by the integrated spring mechanism, the cover moves laterally to expose the samples for observation.

The standard sample holder provides four Ø8 mm positions with a nominal position geometry of Ø8 × 0.5 mm. Alternative sample-holder geometries can be configured according to the intended samples and experimental workflow. A machine-specific SEM mounting adapter is included, with configurations available for selected ZEISS, JEOL, and Thermo Scientific platforms, as well as other microscope models following compatibility review.

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Vacuum Transfer Chamber for Air-Sensitive Samples

S4R InertBridge™

Protected glovebox-to-SEM transfer for air- and moisture-sensitive samples

The S4R InertBridge™ is a compact vacuum transfer chamber developed for the protected transfer of air-sensitive samples from a glovebox to a scanning electron microscope.

A pressure-differential retention mechanism holds the cover against the sealing interface during handling and transport, while an integrated spring drives its lateral opening during SEM pump-down.

Sample capacity
4 positions
Standard sample recess
Ø 8 mm × 0.5 mm deep
Nominal mass
200 g
SEM integration
Model-specific adapter
Product Highlights

Protected transfer through a compact pressure-responsive system

Designed to limit atmospheric exposure between controlled sample preparation in a glovebox and observation inside a scanning electron microscope.

01

Protected transfer

Keeps air-sensitive samples inside an evacuated compartment during transfer from the glovebox to the SEM.

02

Pressure-differential retention

The pressure difference between the evacuated compartment and the ambient atmosphere presses the cover against the sealing interface.

03

Passive spring-driven opening

SEM pump-down reduces the pressure-dependent retaining resistance until the spring preload overcomes it and drives the cover laterally. No powered actuator is required in the chamber.

04

Configurable integration

Model-specific mounting adapters and alternative sample-holder geometries can be configured for the intended experimental setup.

Operating Workflow

From glovebox preparation to sample recovery

Seven defined steps, from sample preparation under controlled atmosphere to retrieval of the holder after imaging.

01
Inside the glovebox

Sample preparation

Prepare and position the samples in the four-position holder under the required controlled-atmosphere conditions.

02
Inside the glovebox

Chamber loading

Insert the loaded holder into the sample compartment and place the cover in its closing position.

03
Inside the glovebox

Evacuation and closure

Evacuate the compartment through the vacuum connection. The resulting pressure differential holds the cover against the sealing interface.

04
Protected transfer

Glovebox-to-SEM transfer

Remove the closed chamber from the glovebox and carry it to the microscope. The compartment remains sealed throughout handling.

05
SEM integration

SEM installation

Install the chamber in the microscope using the dedicated model-specific mounting adapter.

06
Pressure-responsive release

Pump-down and opening

As chamber pressure decreases, the pressure-dependent retaining resistance diminishes until the spring preload overcomes it and drives the cover laterally to expose the samples.

07
After imaging

Sample recovery

The cover remains in its open position after the analysis. Once the microscope is vented, the sample holder is retrieved directly from the chamber. The protected transfer applies to the route towards the microscope; the return path is carried out under laboratory atmosphere.

Opening Principle

Passive release during SEM chamber evacuation

During transport at ambient laboratory pressure, the pressure outside the evacuated compartment is higher than the pressure inside it. The pressure difference across the cover produces a normal force that presses it against the sealing interface. The resulting contact resistance opposes the lateral preload of the integrated spring.

As the SEM chamber is evacuated, the external pressure decreases, the normal force across the cover falls and the retaining resistance decreases with it. Once the spring preload exceeds that resistance, the cover is released and travels laterally to expose the samples.

Ambient transfer
Cover held closed
SEM pump-down
Retaining resistance falls
Sample exposure
Spring-driven opening
Passive operating principle The release sequence depends on the pressure differential, the effective cover area, the condition of the sealing interface and the spring preload. No powered actuator is required inside the SEM chamber. Operating conditions depend on the validated installation and transfer protocol.
Sample Holder

Four-position holder with configurable recess geometry

The standard holder is machined from 316 stainless steel and incorporates four cylindrical sample recesses, each with a nominal diameter of Ø 8 mm and a nominal depth of 0.5 mm.

Because the intended specimens are solid, recess diameter and depth are the governing dimensional specifications. Alternative layouts can be evaluated according to the sample geometry and the analytical workflow.

Standard capacity
4 samples
Standard recess
Ø 8 mm × 0.5 mm
Custom layouts
Available
Configuration service Custom holder development is based on the sample dimensions, the required number of positions, the mounting method, the available microscope clearance and the intended analysis conditions.
Construction

Materials and vacuum interface

Machined construction combining an anodised aluminium body with a stainless steel sample holder and a user-replaceable sealing element.

Chamber body
Anodised aluminium

Machined body and cover, anodised for surface protection.

Sample holder
316 stainless steel

Four cylindrical recesses, Ø 8 mm × 0.5 mm deep.

Sealing element
Silicone O-ring

Replaceable by the user without returning the chamber.

Vacuum connection
Ø 8 mm quick connector

Accepts tubing of 8 mm outside diameter for evacuation.

Sealing element The O-ring is a wear component. Inspect it before each transfer for compression set, particles or damage, since sealing integrity and the pressure-dependent retention both depend on the condition of the sealing interface.
SEM Integration

Model-specific integration across SEM platforms

The chamber is installed inside the microscope through a dedicated mounting adapter configured for the specified SEM model. One compatible adapter is included according to the selected product configuration.

Configured platforms

Adapter configurations are available for selected ZEISS, JEOL and Thermo Scientific SEM models.

Other platforms

Custom integration is evaluated according to the mechanical interface, chamber clearance, stage geometry and cover-opening envelope.

Confirm the exact SEM model before ordering Compatibility is not determined by the manufacturer alone. Please contact S4R with the exact microscope model and stage configuration: the adapter and the cover-opening orientation depend on the mounting interface, the available chamber volume, the detector arrangement, the working-distance requirement and the sample height.
Typical Applications

SEM characterisation of air- and moisture-sensitive materials

Intended for mounted samples whose surface chemistry, morphology or analytical response may be altered by exposure to ambient oxygen or moisture.

Battery materials and interfaces

Prepared electrodes, interfacial cross sections and other mounted battery materials for SEM imaging and compatible microanalysis.

Solid electrolytes

Moisture-sensitive or reactive solid-electrolyte materials following preparation under controlled atmosphere.

Air-sensitive functional materials

Mounted functional materials whose surfaces may oxidise, hydrate or otherwise change rapidly when exposed to laboratory air.

Powders, thin films and cross sections

Secured powder specimens, crystals, thin films and cross sections prepared under controlled atmosphere.

Dimensions and Mass

Compact geometry for SEM chamber integration

Refer to the dimensional drawing for the external envelope, the mounting interface, the sample position and the lateral cover-opening clearance.

Nominal chamber mass
200 g
Product Data

Technical specifications

Standard configuration of the transfer chamber.

Parameter Specification
Product type Vacuum transfer chamber for air-sensitive samples intended for SEM analysis
Transfer route Glovebox to scanning electron microscope
Protection principle Transfer inside an evacuated, closed sample compartment
Closure principle Pressure-differential retention against the sealing interface
Opening principle Pressure-dependent retaining resistance decreases during SEM pump-down; spring-driven lateral opening without a powered in-chamber actuator
Chamber material Anodised aluminium
Sample-holder material 316 stainless steel
Sealing element Silicone O-ring, replaceable by the user
Vacuum connection Quick connector for tubing of Ø 8 mm outside diameter
Standard sample holder 4 positions, cylindrical recesses of Ø 8 mm × 0.5 mm deep
Custom sample holder Alternative geometries available on request
Nominal chamber mass 200 g
External dimensions Refer to the dimensional drawing
SEM mounting Model-specific adapter; one compatible adapter included according to the selected configuration
Configured platforms Selected ZEISS, JEOL and Thermo Scientific SEM models; exact model confirmation required
Other platforms Custom integration available following compatibility review
Positioning stand Included
Vacuum pump Available as an option
Package Contents

Included components

Transfer chamber
Complete chamber with cover, sealing interface, opening mechanism and vacuum connection
Sample holder
Standard four-position holder in 316 stainless steel
Positioning stand
Dedicated stand for sample loading, evacuation and routine handling
SEM adapter
One model-specific mounting adapter for the configured microscope
Documentation
User manual covering loading, evacuation, transport, SEM installation and handling
Not included The vacuum pump, available as an option for pre-evacuation of the sample compartment, together with the vacuum tubing, the specimen stubs and any additional sample holder beyond the standard four-position unit.
Transfer performance Performance depends on the initial evacuation level, the condition and cleanliness of the sealing interface, the transport duration and correct handling of the chamber between the glovebox and the microscope.
Materials and analytical conditions The chamber body is anodised aluminium and the holder is 316 stainless steel. Contact S4R if your protocol imposes specific constraints on materials, residual atmosphere or sample environment, so that the configuration can be reviewed for the intended analysis.
ZEISS, JEOL and Thermo Scientific are trademarks of their respective owners. Their mention here indicates instrument compatibility only and does not imply any affiliation with or endorsement by S4R.

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