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Laminar Flow Enclosure

  • Free Standing Enclosure Frames for Nexus® Optical Tables
  • HEPA Filter and Enclosure Frame Create a Clean Environment
  • Laminar Flow from HEPA Filter Unit


Air Quality Monitor is
Compatible with Our XE Rail T-Slots

Related Items

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General Specifications
Maximum Additional Loada,b 400 kg
Maximum Load per
Construction Rail
100 kg
Total Weight of Enclosure 150 kg
Foot Height Adjustment ±11.5 mm
HEPA Filter Efficiency 99.95%
Internal Dimensions 1230 mm x 2100 mm x 1132.5 mmc
Frame Dimensionsd 2.20 m x 1.33 m x 2.36 m
Crate Dimensions 2.29 m x 0.75 m x 0.79 m
  • To prevent the frame toppling, any attached load which acts outside the perimeter of the frame should not create a moment load >800 Nm about an axis between any two of the feet.
  • The maximum load per roof panel is a 40 kg distributed load.
  • Height is measured to the base of the soft wall transparent curtains.
  • 300 mm clearance is needed above the HEPA filter.

Click to Enlarge

Rendering of Laminar Flow Enclosure with a Nexus Optical Table


  • Free Standing Enclosure Frame
  • Designed to Fit a 1.2 m x 2.0 m (4' x 6') Nexus® Optical Table
  • HEPA Fan Filter Unit (FFU) Creates a Clean Environment
  • Air Quality Monitor (AQM) Continuously Monitors the Enclosure's Air Quality
  • Low-Odor Transparent Curtain Walls and Enclosed Ceiling

Thorlabs' Laminar Flow Enclosures are designed to create a clean environment around 1.2 m x 2.0 m (4' x 6') Nexus optical tables by providing an enclosed air volume and filtration system to help minimize contamination. The system incorporates an enclosure frame; soft wall transparent curtain sides; an enclosed ceiling; and a top-mounted HEPA Fan Filter Unit (FFU). The enclosure frame does not touch the optical table in order to avoid the transmission of vibrations from the frame to the table. It also includes an Air Quality Monitor (AQM) that continuously monitors the quality of the air inside the enclosure.

The HEPA filter units shipped with the enclosures require a voltage of 115 V (-US enclosures) or 230 V (-EU and -UK enclosures). Please note that cables are not provided with the HEPA filter. Assembly and wiring of the filter should be carried out as per local regulations. For more information, please refer to the HEPA manual shipped with each enclosure.

We're All Ears!
Laminar Flow Enclosures are
designed in our UK office.

Interested in Custom Capabilities?

Thorlabs is in the process of expanding our offering of Laminar Flow Systems and accessories. If you are interested in features that you don't see here, please
contact us to discuss custom requests.

Lab Infrastructure Webinar

Each enclosure frame is composed of rails that are compatible with our 50 mm & 75 mm construction rail accessories, including T-nuts and screws, mounting brackets and feet, rail joiners, and channel inserts. An LED light strip on the interior of the structure helps illuminate the optical table. Additionally, a curtain bar with brackets can be attached to the front of the enclosure, which allows the transparent curtain walls to be moved out of the way when working inside the enclosure.

Please note that these enclosures require assembly, a manual process that requires four people to work on at least one of the assembly steps. The fully assembled enclosure will wrap around a nexus optical table. Tables are not included and must be purchased separately. To view a list of compatible Nexus optical tables, please see the Compatible Tables tab. For full assembly instructions, please view the manual by clicking on the red docs icon (info icon) below.

Compatible Nexus Optical Tables
Item # Dimensions Mounting Holes Additional Features
T46H 4' x 6' x 8.3" 1/4"-20 -
T46V 4' x 6' x 8.3" 1/4"-20 Sealed Holes
T46J 4' x 6' x 12.2" 1/4"-20 -
T46W 4' x 6' x 12.2" 1/4"-20 Sealed Holes
T46HHa 4' x 6' x 8.3" 1/4"-20 Two Through Ports
T46K 4' x 6' x 18.1" 1/4"-20 -
T46X 4' x 6' x 18.1" 1/4"-20 Sealed Holes
T1220C 1.2 m x 2.0 m x 210 mm M6 x 1.0 -
T1220Pb 1.2 m x 2.0 m x 210 mm M6 x 1.0 Sealed Holes
T1220D 1.2 m x 2.0 m x 310 mm M6 x 1.0 -
T1220CH 1.2 m x 2.0 m x 210 mm M6 x 1.0 Two Through Ports
T1220E 1.2 m x 2.0 m x 460 mm M6 x 1.0 -
T1220R 1.2 m x 2.0 m x 460 mm M6 x 1.0 Sealed Holes
T1220Q 1.2 m x 2.0 m x 310 mm M6 x 1.0 Sealed Holes
  • Also available bundled with 700 mm tall active isolator legs (Bundle Item # T46HK).
  • Also available bundled with 700 mm tall active isolator legs (Bundle Item # T1220CK).

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Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
LFE1220-US Support Documentation
LFE1220-USLaminar Flow Enclosure for 4' x 6' Table, 115 V Fan Unit, US Plugs
+1 Qty Docs Part Number - Metric Price Available
LFE1220-EU Support Documentation
LFE1220-EULaminar Flow Enclosure for 1.2 m x 2.0 m Table, 230 V Fan Unit, EU Plugs
Lead Time
LFE1220-UK Support Documentation
LFE1220-UKLaminar Flow Enclosure for 1.2 m x 2.0 m Table, 230 V Fan Unit, UK Plugs
Lead Time
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