Guided Wave's Teflon flow Cell was developed for sample streams that are either extremely corrosive or intolerant to metal contamination. None of the cell’s wetted parts are constructed of metal. Only smooth Teflon and sapphire surfaces contact the process stream. Otherwise, the Teflon Flow Cell utilizes the same optical components as our popular Multi-Purpose Flow Cell. Corrosion resistant stainless steel is used in the outer cell construction to maintain a rigid, stable optical pathlength. Hence, it has the same high optical efficiency. Plus, it is guaranteed not to leak!
Quality is in the Design
Teflon not only “cold flows”, but has a very large temperature coefficient of expansion. To maintain the all important pathlength, stainless steel rods are embedded in the Teflon body. The windows and other precision optics are held rigidly in place by these rods. Thus, preventing even the slightest change to the critical pathlength during the normal expansion and contraction that naturally occurs with Teflon products. The measurement accuracy of the stream is therefore never compromised due to this or any other phenomena. If necessary, the cell can be completely disassembled for inspection or deep cleaning. The reassemble step is easily accomplished without changing the critical pathlength. For your convenience, the Teflon Flow Cell is equipped with a clean-out port that provides access to the windows for cleaning without disconnecting fibers or plumbing.
Since no metal parts come in contact with the liquid stream, the design is ideal for processes where even parts per billion levels of metals contamination can create serious problems as in semiconductor fab etching and cleaning steps. The cell also performs well in the presence of extremely corrosive streams containing strong acids, bases, peroxides or halogenated
The Teflon Flow Cell operates at moderate temperatures and
pressures. Specifically, safe upper limits for deployment are:
• Temperatures to 150 °C
• Pressures to 100 psi
Available in four standard pathlengths 2, 5, 10 and 20 mm, but
other custom paths are available by special order.
Common Integration with Most Spectrometers
The Teflon Flow Cell is manufactured to facilitate full integration with any fiber optic system configured with SMA 905 connectors. Keep in mind that operation with fibers having a core diameter of 400 to 600 micron will provide the best optical performance.
Exceptional Light Transmission
Like other Guided Wave optical probes, the Teflon Flow Cell provides exceptional optical performance. Typical peak
transmission exceeds 50%. That means more signal, lower measurement noise and lower detection limits. The flow cell
can be completely dismantled, then reassembled without changing the sampling pathlength, an important feature when
working with established NIR calibration models.
Compatible with All Guided Wave Analyzers
The sample interface is a crucial component of a complete fiber optic based analyzer system. For optimal performance,the probe must be ‘’optically matched’’ with both the spectrometer and the fiber optic cable. The Teflon Flow Cell, just as is the case for all Guided Wave’s probes, provides consistently high performance when used in combination with our analyzers and fiber
|Specifications||Teflon Flow Cell|
|Uses / Applications||Corrosive process streams, semiconductor applications, cleanroom environments, laboratory use|
|Pressure Range (psi)||0 to 100
|Maximum Temperature (°C)||150|
|Spectral Range (nm)||UV-Vis (200-1000); Vis-NIR (400-2100)
|Optical Pathlength (mm) ||2;5;10;20|
|Fiber Connector||SMA 905|