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Empty Glass Cells


  • 100 mm Long Empty Borosilicate Cells for Spectroscopy
  • Ø25 mm or Ø50 mm Flat Windows or Threaded Ends
  • Available with One or Two Fill Tubes
  • Custom Solutions Available

TGC100B

Two Fill Tubes,
Threaded Ends

Application Idea

The KF25C050 Ø1/2" compression fitting provides compatibility with KF25-flanged vacuum systems.

GC501

One Fill Tube,
Ø50 mm Windows

GCV251

One Fill Tube with
J. Young® Valve,
Ø25 mm Windows

Borosilicate Cell

KF25C050 KF25 Flange to Compression Fitting Adapter

KF25WNC Wing Nut Clamp, KF25CR-F Centering O-Ring Inside

Related Items


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Ø25 mm Glass Cell in Heater Assembly
Click to Enlarge

View Product List
Item #QtyDescription
GC2511Empty Glass Cell with Ø25 mm Fused Windows, 100 mm Long, One Fill Tube
GCH25-751Heater Assembly for Ø9, Ø19, or Ø25 mm x 75 mm Glass Cells, 15 W per Heating Element
ER4-P41Cage Assembly Rod, 4" Long, Ø6 mm, 4 Pack
Our Ø25 mm glass cells can be mounted in our GCH25-75 Heater and four ER4 cage rods.
J. Young<sup>®</sup> Valve
Click to Enlarge

The GCV251, TGC100V, and GCV501 Empty Glass Cells feature a J. Young® Valve that can be closed to maintain a high-vacuum seal.
Glass Cell Mounted in V-Clamp
Click to Enlarge

These empty glass cells can also be mounted in our VC3C V-Clamp.

Features

  • 100 mm Glass Cells for Spectroscopy Applications
  • Both Ends Include Ø25 mm Windows, Ø50 mm Windows, or Threading for End Cap
  • Borosilicate Substrate for Cell and Windows
  • High Transmission from 350 to 2200 nm
  • Available with One Tube for Filling or Two Tubes for Flow
  • Single Fill Tube Cells Also Available with Genuine J. Young® Valve for Sealing
  • Custom Design and Manufacturing Services Available (Contact Tech Support)
  • Ø25 mm Cells Compatible with a Variety of Glass Cell Heaters

These empty borosilicate glass cells can be filled with vapors of specific atomic elements or molecular compounds, each of which has a well-defined absorption spectrum. Cells are available with either one or two fill tubes. A single fill tube is useful when sealing a cell while two fill tubes can be used to maintain constant gas flow. We also offer empty cells with a single fill tube and a J. Young® valve to seal the cell with a high-vacuum, greaseless stopcock (see the image to the right). Each fill tube has a 1/2" outer diameter for compatibility with Ø1/2" compression fittings, as shown in the Application Idea image above. Custom reference cells can be manufactured upon request, including different cell lengths, cell diameters, or fill tube configurations. Please contact Tech Support with inquiries.

Each cell is made from borosilicate glass, a rugged material known to resist chipping and cracking, and has high transmission from 350 nm to 2.2 µm. All glass cells on this page can hold a vacuum below 10-7 Torr and withstand pressures up to 5 psi. The post-production cleaning process for these cells consists of an ultrasonic cleaning followed by a methanol rinse. The cell is then connected to a vacuum system and leak tested. The cells are not vacuum sealed when shipped; before using the cell in a vacuum setup, we advise users to follow a similar cleaning process for each cell.

The ends of each cell include either Ø25 mm fused windows, Ø50 mm fused windows, or external GL-32 threading for the GC1 end cap (sold separately below). When using the threaded version, a Ø25 mm or Ø1" flat window, 3 - 5 mm thick, can be mounted inside the end cap, which includes a through hole with a clear aperture of 0.79". See the image below for an illustration of this setup.

These cells are commonly used in spectroscopic applications such as tunable diode laser calibration, stabilization of laser frequencies, and calibration of wavelength meters. Refer to the Application tab for a general overview of use with absorption spectroscopy. We also offer pre-assembled Herriott cells for gas absorption spectroscopy applications, as well as filled and sealed vapor reference cells.

Glass Cell with Ring Heater Schematic
Click for Details

Schematic of Threaded Glass Cell with Window, Ring Heater, Viton® O-Rings, and End Cap

Mounting & Heating Options
The glass cells can be mounted in our V-Clamp Mounts, which are available in standard, kinematic, or Ø1.5" post-compatible versions. Please check that the cell diameter is supported by the mount. Cells with fused Ø25 mm windows can be mounted in our GCH25-75 Glass Cell Heater as illustrated in the photo to the upper right. This requires swapping out the included Ø6 mm cage rods with four ER4 4" long cage rods. We also offer the GCH25R Cap Heater for cells with fused Ø25 mm windows. This heater attaches directly to the end of a cell. Our cells with threaded ends can be heated using the HT10KR Ring Heater, which can fit inside the threaded end cap, as illustrated to the left. Our HT10K and TLK-H Resistive Foil Heaters can attach to the outside of the glass cells via adhesive backing.

*J. Young® is a registered trademark of GPE Scientific. Viton® is a registered trademark of DuPont.

Absorption Spectroscopy

The reference substance pumped into the glass cell is associated with a unique absorption spectrum that serves as its fingerprint, the contents of a reference cell can be determined via a linear absorption measurement (as depicted by the simplified schematic below). By scanning a tunable diode laser over a wavelength range and detecting light absorption with a photodetector, a series of peaks will be recorded, which is characteristic of the vapor inside the cell. Please note that we also offer pre-filled and sealed vapor reference cells with quartz or borosilicate substrates.

Reference Cell Setup
Animated Example of a Vacuum-Sealed System

Creating a Vacuum Seal with a KF Flange

Thorlabs' empty borosilicate cells can be used with our KF-Flanged components and accessories in order to manage gas flow in and out of the cell. The glass cells are terminated with one or two Ø0.50" (Ø12.7 mm) fill tubes that can be inserted into the KF25C050 flange-to-compression-fitting adapter.

To input the cell into a vacuum system:

  1. Coat a cleaned and inspected KF25CR-F O-Ring in vacuum grease and place it on a base post or pipe.
  2. Place the KF25C050 flange-to-compression-fitting adapter on top of the o-ring and secure them with the KF25WNC wing nut clamp.
  3. Loosen and remove the knurled locking knob of the KF25C050 so its mating surface can be inspected and the included O-Ring can be coated in vacuum grease. This will create a vacuum seal when the cell is inserted into the system.
  4. Loosely tighten the knurled locking knob and insert the fill tube of the borosilicate cell and tighten the knob by hand.

For an animated representation of the above process, please see the video to the right. 


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Ø25 mm Empty Glass Cells with Fused Windows

Specifications
Item # GC251 GCV251 GC252
Fill Tubes One One Two at 90°
Valve Type N/A J. Young N/A
Cell Length 100.0 ± 3 mm
Window Size Ø25.0 ± 0.5 mm
Window Clear Aperture Ø21.0 mm
Window Thickness 3.0 ± 0.5 mm
Window Perpendicularity ±1°
Pressure @ 25 °C <10-7 Torr to 5 psi
Fill Tube Outer Diameter 0.50" (12.7 mm)
Window & Cell Substrate Uncoated Borosilicate
Borosilicate Transmission
(Click for Plot)
Diagram (Click to View)
  • 100 mm Long Empty Borosilicate Cells
  • Fused, Ø25 mm Borosilicate Windows with Ø21 mm Clear Aperture
  • Three Versions Available:
    • GC251: One Fill Tube
    • GCV251: One Fill Tube with J. Young® Valve
    • GC252: Two Fill Tubes

Our Ø25 mm empty borosilicate glass cells are available in three varieties. The GC251 and GC252 cells incorporate one and two fill tubes, respectively. The GCV251 cell has one fill tube and features a J. Young® valve at a 90° bend. The valve incorporates a retractable, greaseless, PTFE stopcock for maintaining a high vacuum. The yellow knob can be tightened to create a seal before the T-junction fill tube or unscrewed completely for cleaning.

Thorlabs also offers a selection of heaters for Ø25 mm glass cells.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
GC251 Support Documentation
GC251Empty Glass Cell with Ø25 mm Fused Windows, 100 mm Long, One Fill Tube
$238.70
Today
GCV251 Support Documentation
GCV251Empty Glass Cell with Ø25 mm Fused Windows, 100 mm Long, One Fill Tube with J. Young® Valve
$424.36
Today
GC252 Support Documentation
GC252Empty Glass Cell with Ø25 mm Fused Windows, 100 mm Long, Two Fill Tubes
$265.23
Today

Ø28 mm Empty Glass Cells with Threaded Ends

Specifications
Item # TGC100A TGC100V TGC100B TGC100C TGC100D
Fill Tubes One One Two at 90° Two at 0° Two at 0°
Valve Type N/A J. Young N/A N/A Two Glass Stopcocks
Cell Length 100.0 ± 3 mm
Cell Diameter Ø28.0 ± 0.5 mm
Pressure @ 25 °C <10-7 Torr to 5 psi
Fill Tube Outer Diameter 0.50" (12.7 mm)
Cell Substrate Uncoated Borosilicate
Diagram (Click to View)
  • 100 mm Long Empty Borosilicate Cells
  • Ø28 mm Body with GL-32 Threading on Each End
  • Five Versions Available:
    • TGC100A: One Fill Tube
    • TGC100V: One Fill Tube with J. Young® Valve
    • TGC100B: Two Perpendicular Fill Tubes
    • TGC100C: Two Parallel Fill Tubes
    • TGC100D: Two Parallel Fill Tubes with Glass Stopcocks
  • Threaded Plastic Caps and Viton® O-Rings for Sealing Ends

Our Ø28 mm empty borosilicate glass cells have threaded ends with no windows. The cells can be closed using two GC1 polybutylene terephthalate (PBT) end caps, which are designed to hold a Ø25 mm or Ø1" flat window (3 - 5 mm thick). Each end cap includes two GC1V Viton® O-rings with an X-shaped cross section (Dash # 211*), which can also be purchased separately.

The threaded glass cells are available in five varieties. The TGC100A has a single fill tube. The TGC100V has one fill tube with a J. Young® valve at a 90° bend. The valve incorporates a retractable, greaseless, PTFE stopcock for maintaining a high vacuum. The yellow knob can be tightened to create a seal before the T-junction fill tube or unscrewed completely for cleaning.

The TGC100B cell features two fill tubes oriented at 90°, while the TGC100C and TGC100D cells each have two parallel fill tubes. The fill tubes on the TGC100D also feature glass stopcocks that can maintain a high vacuum.

The HT10KR ring heater can fit inside the threaded plastic cap; the cap features a slot to allow the ring heater wires to exit. We also offer a variety of other TEC elements, resistive heaters, thermistors, and thermocouples for temperature control.

*Society of Automotive Engineers (SAE) Dash Number as Defined in Standard AS568: Aerospace Size Standard for O-rings

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
TGC100A Support Documentation
TGC100ANEW!Empty Glass Cell with Threaded Ends, 100 mm Long, One Fill Tube
$130.00
Today
TGC100V Support Documentation
TGC100VNEW!Empty Glass Cell with Threaded Ends, 100 mm Long, One Fill Tube with J. Young® Valve
$350.00
Today
TGC100B Support Documentation
TGC100BNEW!Empty Glass Cell with Threaded Ends, 100 mm Long, Two Perpendicular Fill Tubes
$160.00
Today
TGC100C Support Documentation
TGC100CNEW!Empty Glass Cell with Threaded Ends, 100 mm Long, Two Parallel Fill Tubes
$160.00
Today
TGC100D Support Documentation
TGC100DNEW!Empty Glass Cell with Threaded Ends, 100 mm Long, Two Parallel Fill Tubes with Glass Stopcocks
$440.00
Today
GC1 Support Documentation
GC1NEW!End Cap for Ø28 mm Threaded Glass Cells, Two Viton® O-Rings Included
$30.00
Today
GC1V Support Documentation
GC1VNEW!Viton® O-Ring, X Profile, Qty. 10
$15.00
Today

Ø50 mm Empty Glass Cells with Fused Windows

Specifications
Item # GC501 GCV501 GC502
Fill Tubes One One Two at 90°
Valve Type N/A J. Young N/A
Cell Length 100.0 ± 3 mm
Window Size Ø50.0 ± 0.5 mm
Window Clear Aperture Ø36.0 mm
Window Thickness 3.0 ± 0.5 mm
Window Perpendicularity ±1°
Pressure @ 25 °C <10-7 Torr to 5 psi
Fill Tube Outer Diameter 0.50" (12.7 mm)
Window & Cell Substrate Uncoated Borosilicate
Borosilicate Transmission
(Click for Plot)
Diagram (Click to View)
  • 100 mm Long Empty Borosilicate Cells
  • Fused, Ø50 mm Borosilicate Windows with Ø36 mm Clear Aperture
  • Three Versions Available:
    • GC501: One Fill Tube
    • GCV501: One Fill Tube with J. Young® Valve
    • GC502: Two Fill Tubes

Our Ø50 mm empty borosilicate glass cells are available in three varieties. The GC501 and GC502 cells incorporate one and two fill tubes, respectively. The GCV501 cell has one fill tube and features a J. Young® valve at a 90° bend. The valve incorporates a retractable, greaseless, PTFE stopcock for maintaining a high vacuum. The yellow knob can be tightened to create a seal before the T-junction in the fill tube or unscrewed completely for cleaning.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
GC501 Support Documentation
GC501Empty Glass Cell with Ø50 mm Fused Windows, 100 mm Long, One Fill Tube
$291.75
Today
GCV501 Support Documentation
GCV501Empty Glass Cell with Ø50 mm Fused Windows, 100 mm Long, One Fill Tube with J. Young® Valve
$477.41
Today
GC502 Support Documentation
GC502Empty Glass Cell with Ø50 mm Fused Windows, 100 mm Long, Two Fill Tubes
$318.27
Today
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