Omni Cell | Demountable Liquid Cell
This is a Labware Analytical(LA) Product, If you wish to enquiry or order, please fill in the online form or email to info@labware.com.hk.
The Omni-Cell is comprised of a cell body and window assembly. For a complete cell both parts must be ordered individually. For demountable and mull cells spacers are also usually required. If required, a single body can be used with multiple window options for a range of different applications.
Key Features:
- Modular transmission cell system The cell is built up from window sets, spacers, and the cell body/backing plates. It is designed to be disassembled for cleaning and for customisation of pathlength and window materials.
- Choice of permanently sealed or demountable window sets Demountable windows allow for flexibility of pathlength and may be disassembled to clean difficult samples. Sealed cells ensure pathlength stability and avoid leaks.
- Extensive selection of materials Our range of windows cover spectral ranges from the near-IR through to THz frequencies.
Specifications
Omni-Cell Body
The Omni-Cell body is comprised of two aluminium backing plates with a plastic insert between. Four thumbscrews are used to align and fasten these parts together. The transmission windows are sandwiched between the backing plates, sealing against a PTFE gasket on the front plate and a neoprene gasket on the back plate. The front plate is fitted with two Luer ports with PTFE stoppers. Window Options A range of different window materials are available, with different chemical compatibilities and physical properties (such as refractive index and spectral range) to suit your requirements. Sealed Cells offer superior pathlength repeatability for quantitative measurements, whilst demountable cells are more suitable for general purpose applications, allowing the user easy cleaning and to quickly change pathlength at will. The Mull cell was originally designed for the mull technique, now little used, but remains a good option for the analysis of highly viscous liquids and pastes that cannot be loaded in a sealed cell. Note for thin window materials (ZnSe, Silica, AgBr, Si and Polythene) require an additional spacer (supplied as standard with these windows).
| Material | Transmission range (cm-1) | Refractive index @ 1000 cm-1 | Suitable for | Usage notes |
| KBr | 40000—400 | 1.53 | IR | Soluble in water |
| NaCl | 40000—600 | 1.49 | IR | Soluble in water |
| BaF2 | 66000—800 | 1.40 | IR | |
| CaF2 | 50000—1100 | 1.31 | IR | Slightly soluble in nitric acid. Reacts with sulphuric acid to form hydrofluoric acid! |
| ZnSe | 20000—500 | 2.41 | IR | Not suitable for use with acids (<pH 5.0) or strong bases (>pH 9.0) |
| KRS-5 | 16000—250 | 2.37 | Deep IR | Very Toxic – handle with care |
| AgBr | 22000—300 | 2.17 | Deep IR | |
| Fused Silica (IR grade) | 40000—3000 | 1.4 | Near-IR, visible, and UV | |
| Polyethylene | 625—4 | ~1.5 | Far-IR and THz |
Spacers Spacers are available in PTFE and Mylar materials. Compatible Standards
| Method | Number |
| Determination of fatty acid methyl ester (FAME) content in middle distillates. Infrared spectrometry method | EN 14078 |
| In-Service Oil Condition Monitoring standard practice | ASTM D7418 |
| Phosphate Antiwear Additives in In-Service Petroleum and Hydrocarbon Based Lubricants by Trend Analysis | ASTM D7412 |
| Monitoring of Oxidation in In-Service Petroleum and Hydrocarbon Based Lubricants | ASTM D7414 |
| Sulfate By-Products in In-Service Petroleum and Hydrocarbon Based Lubricants | ASTM D7415 |
| Nitration in In-Service Petroleum and Hydrocarbon Based Lubricants | ASTM D7624 |
| Standard Practice for Condition Monitoring of In-Service Lubricants by Trend Analysis Using Fourier Transform Infrared (FT-IR) Spectrometry | ASTM E2412 |
