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Threaded Empty Glass Cells![]()
TGC100A One Fill Tube, TGC100V One Fill Tube with GC1 End Cap for Ø28 mm Threaded Glass Cells GC1V Viton® O-Ring TGC100D Two Parallel Fill Tubes with Glass Stopcocks HT10KR 10 W Metal Ceramic Ring Heater Related Items ![]() Please Wait ![]() Click to Enlarge The TGC100V Empty Glass Cell features a J. Young® Valve that can be closed to maintain a high-vacuum seal.
Features
These empty borosilicate glass cells feature external GL-32 glass threading at their ends which allows users to install Ø25 mm or Ø1" flat windows (3 - 5 mm thick) with a GC1 threaded end cap (see the illustration below). Once windows are attached to ether end, each cell can be filled with vapors of specific atomic elements or molecular compounds for spectroscopic analysis. By choosing a flat window, a spectroscopic light source can be matched with the transmission characteristics of the window material. We also offer empty glass cells that do not have threaded ends and thus do not require asembly. Custom reference cells can be manufactured upon request, including different cell lengths, cell diameters, or fill tube configurations. Please contact Tech Support with inquiries. 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 upper right). Fill tubes with a 0.5" outer diameter are compatible with Ø1/2" compression fittings, as shown in the Vacuum Seal tab. The GC1 caps and GC1V O-Rings will limit the clear aperture of the optic to 0.79". Each cell is made from borosilicate glass, a rugged material known to resist chipping and cracking, and has high transmission from 350 nm to 2200 nm. All glass cells on this page can hold a vacuum below 10-7 Torr and withstand pressures up to 5 psi when properly assembled. 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. 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. ![]() Click for Details Schematic of Threaded Glass Cell with Window, Ring Heater, Viton® O-Rings, and End Cap Mounting & Heating Options *J. Young® is a registered trademark of GPE Scientific. Viton® is a registered trademark of DuPont. Absorption SpectroscopyThe 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. ![]()
Animated Example of a Vacuum-Sealed System
Creating a Vacuum Seal with a KF FlangeThorlabs' 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:
For an animated representation of the above process, please see the video to the right.
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These Ø28 mm empty borosilicate glass cells have threaded ends with no windows. Customer-supplied Ø25 mm or Ø1" flat windows (3 - 5 mm thick) can be installed using two GC1 polybutylene terephthalate (PBT) end caps, which are sold below. Glass cells with a single fill tube are useful when introducing a sample into the cell and sealing it off for measurements. A gas sample can be sealed off in the line or by using a cell with a J. Young® Valve integrated into its fill tube. J. Young® Valves incorporate 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. ![]()
These Ø28 mm empty borosilicate glass cells have threaded ends with no windows. Customer-supplied Ø25 mm or Ø1" flat windows (3 - 5 mm thick) can be installed using two GC1 polybutylene terephthalate (PBT) end caps, which are sold below. Glass cells with two fill tubes enable gas samples to flow through the cells while under analysis. These cells do not come with integrated valves and can only isolate a sample by adding valves at other points in the system. ![]()
These Ø28 mm empty borosilicate glass cells have threaded ends with no windows. Customer-supplied Ø25 mm or Ø1" flat windows (3 - 5 mm thick) can be installed using two GC1 polybutylene terephthalate (PBT) end caps, which are sold below. These glass cells have parallel tubes with or without glass stopcocks. The glass stopcocks incorporated in our TGC100D glass cell are greaseless and designed for high-vacuum applications. ![]()
Our Ø28 mm empty borosilicate glass cells have threaded ends that 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 HT10KR Metal Ceramic Ring Heater can fit inside the threaded plastic cap; the cap features a slot to allow the ring heater wires to exit. Adding this allows the temperature of the gas contained within a threaded cell to be controlled. The heater contains a 10 kΩ thermistor and can be used with the TC200 Temperature Controller. Please note that the max current of the TC200 is 0.75 A; this may inhibit the max power of the heaters. 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 | ||||||||||||||||||||||||||||||||
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