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Empty Glass Cells


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

GC252

Two Fill Tubes,
Ø25 mm Windows

Application Idea

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

GC501

One Fill Tube,
Ø50 mm Windows

GCV251

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

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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 also be mounted in our GCH25-75 Heater and four ER4 cage rods.

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The GCV251 and GCV501 Empty Glass Cells feature a J. Young Valve that can be closed to maintain a high-vacuum seal.

Features

  • Glass Cells for Spectroscopic Applications
  • 100 mm Long Cell with Ø25 mm or Ø50 mm Windows at Both Ends
  • 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 and either Ø25 mm or Ø50 mm windows. A single fill tube is useful when sealing a cell while a cell with two fill tubes can be used to maintain constant gas flow. We also offer an empty cell with a single fill tube and a J. Young valve to seal the cell with a high-vacuum, greaseless stopcock (see below for details). Each fill tube has a 1/2" outer diameter for compatibility with Ø1/2" compression fittings. 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. The cell windows are fused, allowing the cell to hold a vacuum below 10-7 torr. It can also withstand pressures up to 5 psi. The post-production cleaning process for these cells consists of an ultrasonic cleaning step using water, followed by an acetone rinse. Then the cell is connected to a vacuum system and leak tested.

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.

Mounting & Heating Options
These 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 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 Ø25 mm windows. This heater attaches directly to the end of a cell. Our HT10K and TLK-H Resistive Foil Heaters wrap around Ø25 mm glass cells and feature adhesive backing.

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

Posted Comments:
Norbert.Hofmann  (posted 2018-01-17 10:29:02.287)
Can you provide a cross-sectional technical drawing? What is the distance between the lower surface and the shutters and between the shutters and the top surface?
nbayconich  (posted 2018-01-23 10:13:18.0)
Thank you for contacting Thorlabs. At the moment we do not have a cross-sectional drawing available for these optical shutters. The distance between the lower outer surface and the shutter blades is 1.194mm and the distance from the top of the housing to the blade is 6.147mm. The thickness of the blades is approximately 0.003" thick.
user  (posted 2017-05-10 13:10:56.72)
What is the sense (polarity) of the shutter detect signal?
nbayconich  (posted 2017-05-31 10:04:06.0)
Thank you for contacting Thorlabs. Our SH series diaphragm shutters use a high and low voltage to indicate the open and closed shutter positions. The shutters use a Hall effect sensor as the detection medium. A techsupport representative will contact you directly.
user  (posted 2017-05-10 12:53:09.893)
What is the wavelength of the optical sensor inside the package, and is the package opaque or transparent at that wavelength? i.e. will the package glow at some optical wavelength?
nbayconich  (posted 2017-05-25 09:44:28.0)
Thank you for contacting Thorlabs. The controllers of these diaphragm shutters use a hall effect sensor to determine the position which has no internal LED. A techsupport representative will contact you directly.
user  (posted 2016-12-15 04:33:07.613)
We want to use this shutter to block a pulsed laser system 533 nm, 0.1 mJ/pulse, 5 ns pulse duration, 20 Hz, 2 mm spot size, for up to 10 minutes. Is this advisable?
tfrisch  (posted 2016-12-20 09:04:06.0)
Hello, thank you for contacting Thorlabs. While we don't have any formal testing on the pulse damage threshold of these blades, the material would be either stainless steel or PTFE coated stainless steel, and you can use that as a guide. Please email us at TechSupport@Thorlabs.com if you would like to discuss this further.
c.arrasmith  (posted 2016-03-11 13:09:46.837)
I cannot find damage threshold values in any of the literature. Especially for the PTFE coated shutter, can you please update the specifications to include laser power considerations (power density, peak power, average power, pulse energy)? Having no damage threshold numbers for these shutters seems like a large oversight.
besembeson  (posted 2016-03-11 04:28:12.0)
Response from Bweh at Thorlabs USA: Thanks for contacting Thorlabs. The damage threshold for continuous wave laser, tested at 532nm, 0.73mm spot size, exposure for 10 seconds is 1250 W/cm^2. We don't have similar damage threshold yet for pulses.
peter.zaksek  (posted 2015-04-10 00:40:53.513)
Are any of this product can working in water? hi
jlow  (posted 2015-04-15 04:43:22.0)
Response from Jeremy at Thorlabs: The shutter are not waterproof so you should not immerse it in water.

Ø25 mm Empty Glass Cells

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 to 5 psi
Fill Tube Outer Diameter 0.50" (12.7 mm)
Window & Cell Substrate Uncoated Borosilicate
Borosilicate Transmission
(Click for Plot)
Diagram (Click for Details)
  • 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 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
$231.75
Today
GCV251 Support Documentation
GCV251Empty Glass Cell with Ø25 mm Fused Windows, 100 mm Long, One Fill Tube with J. Young Valve
$412.00
Today
GC252 Support Documentation
GC252Empty Glass Cell with Ø25 mm Fused Windows, 100 mm Long, Two Fill Tubes
$257.50
Today

Ø50 mm Empty Glass Cells

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 for Details)
  • 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 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
$283.25
Today
GCV501 Support Documentation
GCV501Empty Glass Cell with Ø50 mm Fused Windows, 100 mm Long, One Fill Tube with J. Young Valve
$463.50
Today
GC502 Support Documentation
GC502Empty Glass Cell with Ø50 mm Fused Windows, 100 mm Long, Two Fill Tubes
$309.00
Today
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