Omni Cell | Demountable Liquid Cell

The Omni-Cellâ„¢ is a demountable system for transmission measurements of liquids, pastes, and mulls. A wide range of window materials are available to cover spectral ranges from the UV to the Far-IR and THz ranges. 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.

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  • 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.
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

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Not sure which option is best? Get in touch with your requirements and we'll gladly help!

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Liquid Sampling Pack

Pack containing Omni Cell, Luer syringe, 2 sets of rectangular KBr windows and 2 sets of CaF2 windows for liquid sampling, 1 set of circular KBr windows for mulls/pastes, assorted PTFE spacers, and a bottle of Nujol mulling agent.

GS01140

Luer Syringe 2 ml

Luer syringe (2 ml volume) used for introducing liquid samples into liquid cells and flow cells.

GS01110

Omni Cell

Omni Cell body consisting of two backing plates, thumbscrews, filling ports, and spacer. Transmission windows and pathlength spacers sold separately. Enquire for more information.

GS01800
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AgBr Circular Omni Cell Windows (Pair)

GS01839
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AgBr Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 2 mm thickness

GS01819
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Assorted PTFE Spacers for Omni Cell (Pkt 10)

GS01864
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BaF2 0.025 mm Omni Cell Sealed Window Unit

GS02214
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BaF2 0.05 mm Omni Cell Sealed Window Unit

GS02224
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BaF2 0.1 mm Omni Cell Sealed Window Unit

GS02234
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BaF2 0.2 mm Omni Cell Sealed Window Unit

GS02244
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BaF2 0.5 mm Omni Cell Sealed Window Unit

GS02254
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BaF2 1 mm Omni Cell Sealed Window Unit

GS02264
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BaF2 Circular Omni Cell Windows (Pair)

GS01833

BaF2 Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 4 mm thickness

GS01813
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CaF2 0.025 mm Omni Cell Sealed Window Unit

GS02213
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CaF2 0.05 mm Omni Cell Sealed Window Unit

GS02223
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CaF2 0.1 mm Omni Cell Sealed Window Unit

GS02233
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CaF2 0.2 mm Omni Cell Sealed Window Unit

GS02243
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CaF2 0.5 mm Omni Cell Sealed Window Unit

GS02253
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CaF2 1 mm Omni Cell Sealed Window Unit

GS02263
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CaF2 Circular Omni Cell Windows (Pair)

GS01832
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CaF2 Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 4 mm thickness

GS01812
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KBr 0.025 mm Omni Cell Sealed Window Unit

GS02212
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KBr 0.05 mm Omni Cell Sealed Window Unit

GS02222
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KBr 0.1 mm Omni Cell Sealed Window Unit

GS02232
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KBr 0.2 mm Omni Cell Sealed Window Unit

GS02242
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KBr 0.5 mm Omni Cell Sealed Window Unit

GS02252
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KBr 1 mm Omni Cell Sealed Window Unit

GS02262
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KBr Circular Omni Cell Windows (Pair)

GS01831
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KBr Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 4 mm thickness

GS01811
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KRS5 Circular Omni Cell Windows (Pair)

GS01835
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KRS5 Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 2 mm thickness

GS01815
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Mylar 0.006 mm Circular Spacers (Pkt 5)

GS01881
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Mylar 0.006 mm Rectangular Spacers (Pkt 5)

GS01861
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Mylar 0.012 mm Circular Spacers (Pkt 5)

GS01882
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Mylar 0.012 mm Rectangular Spacers (Pkt 5)

GS01862
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Mylar 0.025 mm Circular Spacers (Pkt 5)

GS01883
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Mylar 0.025 mm Rectangular Spacers (Pkt 5)

GS01863
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NaCl 0.025 mm Omni Cell Sealed Window Unit

GS02211
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NaCl 0.05 mm Omni Cell Sealed Window Unit

GS02221
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NaCl 0.1 mm Omni Cell Sealed Window Unit

GS02231
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NaCl 0.2 mm Omni Cell Sealed Window Unit

GS02241
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NaCl 0.5 mm Omni Cell Sealed Window Unit

GS02251
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NaCl 1 mm Omni Cell Sealed Window Unit

GS02261
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NaCl Circular Omni Cell Windows (Pair)

GS01830
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NaCl Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 4 mm thickness

GS01810
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Polythene Circular Omni Cell Windows(Pair)

GS01841
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Polyethylene Rectangular Omni Cell Windows(Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 3 mm thickness

GS01821
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PTFE 0.05 mm Rectangular Spacers (Pkt 5)

GS01850
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PTFE 0.05 mm Circular Spacers (Pkt 5)

GS01870
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PTFE 0.10 mm Rectangular Spacers (Pkt 5)

GS01851
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PTFE 0.1 mm Circular Spacers (Pkt 5)

GS01871
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PTFE 0.2 mm Rectangular Spacers (Pkt 5)

GS01852
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PTFE 0.2 mm Circular Spacers (Pkt 5)

GS01872
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PTFE 0.5 mm Rectangular Spacers (Pkt 5)

GS01853
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PTFE 0.5 mm Circular Spacers (Pkt 5)

GS01873
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PTFE 1.0 mm Rectangular Spacers (Pkt 5)

GS01854
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PTFE 1 mm Circular Spacers (Pkt 5)

GS01874
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Silica(IR) Circular Omni Cell Windows (Pair)

GS01838
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Silica(IR) Rectangular Omni Cell Windows(Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 2 mm thickness

GS01818
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Silicon Circular Omni Cell Windows (Pair)

GS01840
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Silicon Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 2 mm thickness

GS01820
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ZnSe 0.025 mm Omni Cell Sealed Window Unit

GS02215
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ZnSe 0.05 mm Omni Cell Sealed Window Unit

GS02225
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ZnSe 0.1 mm Omni Cell Sealed Window Unit

GS02235
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ZnSe 0.2 mm Omni Cell Sealed Window Unit

GS02245
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ZnSe 0.5 mm Omni Cell Sealed Window Unit

GS02255
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ZnSe 1 mm Omni Cell Sealed Window Unit

GS02265
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ZnSe Circular Omni Cell Windows (Pair)

GS01834
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ZnSe Rectangular Omni Cell Windows (Pair)

Paired windows, 41 x 23 mm (1 drilled, 1 undrilled), 2 mm thickness

GS01814
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Luer Plugs for Omni-Cell (Pkt 2)

GS01892

Quick Release Nuts for Omni-Cell (Pkt 4)

GS01891

Rear Neoprene Gaskets for Omni-Cell (Pkt 2)Liquid

GS01890

Spacer for Omni-Cell Thin Windows

GS01893
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YOUR ENQUIRY
  • Placeholder
    ZnSe 1 mm Omni Cell Sealed Window Unit
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    KBr 0.05 mm Omni Cell Sealed Window Unit
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    KBr 0.5 mm Omni Cell Sealed Window Unit
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    CaF2 1 mm Omni Cell Sealed Window Unit
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    Mylar 0.025 mm Rectangular Spacers (Pkt 5)
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