Liquid Core Waveguide (LCW) flow cell for absorption measurements
High-precision flow cell for UV/VIS measurements with long optical path length. Ideal for laboratory applications in analytics, seawater analysis, environmental monitoring, and process control with detection in the nanomolar range of e.g. nitrate, nitrite, phosphates, etc.
Model series: LCW flow cells
Flow cells with long path lengths enable measurements at extremely low absorption. Lytegate’s Liquid Core Waveguide (LCW) flow cells allow for precise optical measurements at long path lengths with minimal sample volumes. The flow cell functions like an optical fiber, with the liquid sample serving as the fiber’s core. This allows for optical path lengths of up to 200 cm while maintaining excellent optical transmission, making them ideal for UV/VIS spectroscopy applications where low concentrations must be reliably detected. LCW flow cells are used in laboratory chemistry, seawater analysis (CDOM), and colorimetry. They are optimized for fluid injection analysis (FIA) and gas-segmented analyzers. Optical detection is performed using fiber optic spectrometers and photometer systems. The robust construction, high-quality materials, and integration into existing spectroscopic flow setups make this flow cell a versatile solution for research, bench analytics, process-, and bioprocess monitoring.
Key features
Technical data
| Category | Specification |
|---|---|
| Path length | 20 cm ±1cm |
| Wavelength range1 | 200 nm – 920 nm |
| Transmission2 | 15 % @ 254 nm, 20 % @ 500 nm, 18 % @ 700 nm |
| Internal volume | 0,16 ml |
| Typical flow rate | 2 ml/min |
| Temperature range | 5-95 °C |
| Maximum pressure3 | 5 bar |
| Fluid connection | HPLC 10-32 coned fitting, for 1/16″ tubing |
| Optical connection | SMA 905, 600 µm, SMA-Lock |
| Window | Fused Silica Fiber |
| Wetted materials | PEEK, Teflon, Fused Silica |
1 Flow cell filled with Ultrapure Water (18 MOhm, TOC < 10 ppb)
2 The transmission is measured using two directly coupled fibers with a core diameter of 600 µm as a reference and filled as described in 1
3 Higher maximum pressure ratings available on request
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Compact HPLC flow cell made of PEEK with 10-32 UNF connection, selectable path length (0.3-1.0 mm) and <50 µl internal volume. Pressure-resistant up to 30 bar, suitable for 200-2400 nm. Ideal for UV/VIS and inline analysis.
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