Omni Cell | Demountable Liquid Cell

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.

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 setsDemountable 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.

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Meer informatie over Omni Cell | Demountable Liquid Cell

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	Transmissionrange (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 For a Sealed cell a lead spacer is permanently sealed to the windows and is selected as part of the window. For Demountable and Mull cells the spacer can be changed at will and must be ordered separately.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