Terra Part # 1692-94
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58567
Hood; PCR Hood, Static-Dissipative PVC, 48" W x 24" D x 41" H, 120 V

• Portable hood converts any benchtop surface into a controlled PCR work station

• Safe UVC Sterilizer with “exposure switch” to protect users from harmful UV light

• Air flow speed of >90 feet/minutes (0.46 m/s) from the Hood’s HEPA filter

• Hood operates quietly: 50 dBA measured 30" (762 mm) from HEPA filter face

Manufactured by: Terra Universal

Model: PCR Hood

Sash Design: Manual/Tilt-Up

Width: 48"

Depth: 24"

Height: 41"

Sash Opening: 15"

Max Opening: 23" H

Work Area Dimensions: 46.25" W x 24" D

Sash Height: 8"

Unit of Measure: EA

Electrical Specifications: 120 V, 50/60 Hz

Weight, Product: 70 lb

Dimensions, Product: 48" W x 24" D x 40.5" H

Weight, Shipping: 340 lb

Dimensions, Shipping: 54" W x 30" D x 46" H

Package Type: Crate

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Specialty Laboratory Hoods

  • PCR Workstation PCR Workstation
PCR Workstation

Features and Benefits

Vertical vs Horizontal Laminar Flow

Vertical vs. Horizontal Laminar Flow Hoods: A Scorecard for Specifiers

Laminar is derived from the Latin lamina, a thin sheet of material. When used to describe a laboratory hood, the term "laminar flow" refers to air exiting a filter in parallel layers that move at the same speed and in the same direction, vertically or horizontally across the enclosure. Any particles introduced in a laminar flow of air during a work process are predictably swept in the direction of the flow and removed from the enclosure, downstream of critical processes.

Disruption to laminarity results in turbulence, a randomized flow that suspends particles in eddies rather than removing them. Because they can remain in the system, carried by “second-pass” air that swirls around the critical work area, contaminants are deposited unpredictably, often with disastrous results.

Consideration #1: Footprint

Vertical laminar flow (VLF) hoods position the fan filter unit on top of the hood, a space-efficient design that accommodates most facilities as long as overhead clearance isn’t a problem. Horizontal laminar flow (HLF) hoods position the fan on the back of the hood, necessitating as much as 18” or more additional floor or bench space for fan, filter and make-up air flow. In a cleanroom or lab where space is at a premium, that difference alone could determine your choice. Footprint Advantage: VLF Hood


Consideration #2: Air Sash

VLF hoods often have an adjustable sash at the front of the hood to maintain the downward laminar air flow. HLF hoods are generally open at the front of the hood to ensure unrestricted horizontal air flow. The larger opening of an HLF hood makes placement of large objects and instruments easier when compared to a VLF hood although, without a sash to serve as a shield, chemical fumes or powders inside the work area may blow into the operator's face. Sash Advantage: VLF Hood (operator safety); HLF Hood (transferring large materials)


Consideration #3: Laminar Flow

Although both hoods are effective at sweeping particles from the hood, air eventually encounters obstacles that disrupt laminar flow. In most VLF hoods, the work surface creates turbulence, so critical processes must be performed above the surface to avoid contact with “second-pass” air that could contaminate a sensitive operation. Some VLF designs include a perforated floor with sub-surface plenum to reduce this obstruction, but these measures add cost. HLF hoods generally minimize this airflow disruption. However, large objects placed on the work surface can cause swirling or contaminate downstream materials, so critical operations should take place adjacent to the filter face. Laminar Flow Advantage: HLF Hood

We end with a tie; your working conditions will help you determine which of these advantages matter most in your operation.

Safety Alert: Under no circumstances should laminar flow hoods be used in the presence of hazardous materials. Use a fume hood or biological safety cabinet for safe biohazard containment.

ModelHorizontal Laminar Flow (HLF) StationVertical Laminar Flow (VLF) StationValuLine™ VLF StationValuLine Whisperflow HoodPortable CleanBooth
FlowHorizontalVerticalVerticalVerticalVertical
Nominal Widths 7', 6', 4'
(2.1 m, 1.8 m, 1.2 m)
8', 6', 5', 4'
(2.4 m, 1.8 m, 1.5 m, 1.2 m)
8', 6', 5', 4'
(2.4 m, 1.8 m, 1.5 m, 1.2 m )
6', 5 ', 4', 3 ', 2 '
(1.8 m, 1.5 m, 1.2 m, .9 m, .6 m)
6', 4'
(1.8 m, 1.2 m)
Nominal Overall Depth and Height44"D x 63"H
(1118 mm x 1600 mm)
41"D x 90"H
(1041 mm x 2286 mm)
41"D x 90"H
(1041 mm x 2286 mm)
24”/30”D x 41”H
(610/762 mm x 2286 mm)
30"D x 82"H
(762 mm x 2083 mm)
Nominal Working Space30"D x 28"H
(762 mm x 711 mm)
27"D (686 mm); height depends on workbench used27"D (686 mm); height depends on workbench used24”/30”D x 23”H (610/762 mm x 584 mm)24"D (610 mm); height depends on workbench used
Construction Material / Options
  • Powder coated steel frame exterior
  • 304 Stainless steel interior
  • Powder coated steel
  • 304 stainless steel
  • Acrylic or SD PVC shield options
  • Powder coated steel
  • 304 stainless steel
  • Acrylic or SD PVC shield options
  • 304 stainless steel frame
  • 304 SS, acrylic or SD PVC panels
  • Powder Coated Steel Frame
    Work Surface Options
  • Stainless steel work area
  • Optional electropolished finish.
  • Workbench sold separately; many top materials available. 2-piece frame isolates fan vibration.304 Stainless Steel work surface includedPlaced on user-furnished bench (stands available)Workbench sold separately; many top materials available. 2-piece frame isolates fan vibration.
    Blower TypeIntegrated Fan/Filter UnitIntegrated Fan/Filter UnitIntegrated Fan/Filter UnitIntegrated Fan/Filter UnitIntegrated Fan/Filter Unit
    Air Flow,7' (2.1 m)
    6' (1.8 m)
    4' (1.2 m)
    8' (2.4 m)
    6' (1.8 m)
    5' (1.5 m)
    4' (1.2 m)
    8' (2.4 m)
    6' (1.8 m)
    5' (1.5 m)
    4' (1.2 m)
    6'(1.8 m)
    5'(1.5 m)
    4' (1.2 m)
    3 ' (.9 m)
    6' (1.8 m)
    4' (1.2 m)
    CFM (m³/hr)1130 (1920)
    960 (1632)
    650 (1104)
    1300 (2209)
    960 (1632)
    840 (1427)
    650 (1104)
    1300 (2209)
    960 (1631)
    840 (1427)
    650 (1104)
    960 (1632)
    840 (1427)
    650 (1104)
    558 (948)
    960 (1632)
    650 (1104)
    Filter TypesHEPA or ULPAHEPA or ULPAHEPA or ULPAHEPA or ULPAHEPA or ULPA
    PrefilterWashable Polyurethane FoamWashable polyurethane FoamWashable polyurethane FoamWashable polyurethane FoamWashable polyurethane Foam
    Portability / Installation AccessNot portableNot portable.
    Wider than standard door frame
    Not portable.
    Wider than standard door frame
    PortablePortable: CleanBooth frame uses casters.
    Front Sash Configuration OptionsTake-up air slots and plenums on three sides of the work area
  • Motorized sliding shield (allows simplified disassembly and transport)
  • Strip shield curtains
  • Or no shield
  • Counterweighted sliding shield (disassembly requires technical capabilities)
  • Strip shield curtains
  • Or no shield
  • Tilt-UpUses softwall panel kits: vinyl, anti-static vinyl, or 
    non-outgassing polyurethane
    LightingLEDLEDLEDLEDOptional fluorescent lighting
    Noise Level, Measured 30" (762mm) from filter face at 90 FPM (.46m/s)<50 dBA<50 dBA<50 dBA<50 dBA<50 dBA
    Airflow Monitor OptionsMinihelic gauge monitors backpressure across filterIncludes touch screen controls with backpressure indicatorOptional: air velocity meter and differential pressure gauge for filter backpressureOptional swing-vane anemometerOptional: air velocity meter and differential pressure gauge for filter backpressure
    Power Requirements120 VAC, 50/60 Hz
    or 220VAC, 50 Hz
    110 VAC, 50/60 Hz
    or 220VAC, 50 Hz
    110 VAC, 50/60 Hz
    or 220VAC, 50 Hz
    110 VAC, 50/60 Hz
    or 220VAC, 50 Hz
    120 VAC, 50/60 Hz
    or 220VAC, 50 Hz
    Price Range$9,300 – $14,300+$6,000 - $14,000+$5,000 - $10,000+$1500$2,000 - $4,500+
    Application Synopsis
  • Large working space
  • Airflow design reduces turbullence
  • Quiet, reliable fan/filter modules
  • Differential pressure gauge monitors filters
  • Clean, easy-to-sterilize internal surfaces
  • Large working space and overhead clearance
  • Economical
  • Quiet, reliable fan/filter modules
  • Optional counterweighted shield requires overhead clearance for disassembly
  • Large working space and overhead clearance
  • Economical
  • Quiet, reliable fan/filter modules
  • Optional counterweighted shield requires overhead clearance for disassembly
  • Portable
  • Economical, variety of panel materials
  • Quiet, reliable fan/filter modules
  • Easy cleaning
  • Large working space and overhead clearance
  • Economical
  • Quiet, reliable fan/filter modules
  • Portability
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