Terra Part # 2004-11B
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70833
Hood; Vertical Laminar Flow, Wet Processing Station, 304 Stainless Steel, 60" W x 41" D x 90" H, 120 V
  • Bi-directional exhaust system
  • Fits above Terra's Wet Processing Station
  • Cut outs on the back of the hood for the wet station exhaust flange
  • Includes hood, controller, SDPVC side panels, and FFU
  • Bench sold separately
  • For 60" (1524 mm) Modular Wet Station
  • Power Integration Module features switching and breaker protection for all electrical components
  • Operation Status Indicator that flashes if fan is not operational

Airflow Design: Vertical

Depth: 41"

Hood Design: Floor

Filter Type: HEPA, RSR

Frame Material: 304 Stainless Steel

Height: 90"

Inside Depth: 32"

Inside Height: 67"

Inside Width: 57"

Light Fixture: Fluorescent

Manufactured by: Terra Universal

Max Opening: 32" H

Model: Wet Processing Station

Side Panels: Static-Dissipative PVC

Sash Design: Manual/Sliding

Sash Height: 35"

Sash Opening: 16"

Width: 60"

Work Area Dimensions: 57" W x 32" D x 67" H

Unit of Measure: EA

Dimensions, Product: 60" W x 41" D x 90" H

Dimensions, Shipping: 69" W x 45" D x 95" H

Electrical Specifications: 120 V, 12 A, 1,440 W, 50/60 Hz

Marks & Listings: UL, ULC

Package Type: Crate

Weight, Product: 700 lb

Weight, Shipping: 740 lb

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Hoods for Wet Processing

  • HEPA Filtration for Particle-Free Airflow HEPA Filtration for Particle-Free Airflow
  • Vertical Laminar Flow Station with Vibration Isolated Work Surface Isolated Work Surface Enhances High Magnification Viewing
  • High-Clearance, Wide-Access Vertical Laminar Flow Hoods ValuLine™ Vertical Laminar Flow Stations
  • PLC Touchscreen Controls on Vertical Laminar Flow Hood PLC Touchscreen Panel on Vertical Laminar Flow Hood
  • Vertical Laminar Flow Tilt-Up Shield Tilt-Up Shield

Features and Benefits

Laminar Flow and Fume Hoods FAQs

Laminar Flow and Fume Hoods FAQs

Laboratory hoods serve a number of critical purposes in the lab environment.

Product protection from particulate contaminants in the lab environment, including microbes

Such hoods, often called laminar flow workstations or clean benches, use a flow of HEPA-filtered air to prevent influx of viable and non-viable particles into the enclosure and to sweep away any contaminants generated by the work process.

Protection of personnel and lab environment from substances generated inside the enclosure

For fume containment, laboratory fume hoods use a ducted ventilation system that maintains negative pressure. Where ducting is impractical, ductless hoods are also available for removal of non-hazardous contaminants (fumes or particles), using either HEPA or activated carbon filters.

Protection of product, operator and environment

Biological safety cabinets combine aspects of both hood types: a laminar flow of micro-filtered air and negative-pressure containment of bio-hazard fumes.

Laminar Flow Hoods
Vertical Laminar Flow Hood Airflow Diagram

Laminar flow hoods (also called laminar flow clean benches) force air through a HEPA or ULPA filter to create a clean work area free of nearly all contaminating particulates, including bacteria, mold spores and many viruses. These hoods use a vertical or horizontal airflow design. Both provide excellent protection of products from particulates and cross-contamination, but do not protect the operator or environment.

So why choose one over the other? Vertical laminar flow hoods (VLF Hoods) require less floor space, but more overhead clearance. In addition, a sash at the front of the VLF hood provides a barrier between air exiting the hood and the operator’s face. VLF hoods create turbulent air flow when air strikes the work surface, requiring sterile work to be performed above the work surface.

HLF hoods minimize air turbulence (and particle backflow) on the work surface except where equipment disrupts the horizontal airflow. However, they direct the airflow directly at the operator’s face and require more depth to accommodate placement of the fan filter unit at the rear of the hood.

Read more about the differences between horizontal and vertical laminar flow hoods

Fume Exhaust Hoods

Laboratory fume hoods draw air from the environment through the opening of the hood, allowing environmental contaminants into the work area. Thus, lab fume hoods do not offer a sterile environment or product protection. Instead, chemical fume hoods are designed to protect the operator from dangerous or irritating fumes and powders generated from work performed inside the hood.

In ducted fume hoods and canopy fume hoods, air passes out of the hood through a duct leading to an in-house ventilation system that contains and/or neutralizes hazardous materials.

Ductless Exhaust Hood Air Flow Diagram

In ductless fume hoods, fans draw exhaust air through a series of filters that remove irritating substances before release back into the room. Since these filters are not 100% efficient in removing all substances, ductless fume hoods are not advised in the presence of biohazards; however, they provide a convenient, cost-effective solution for operations involving irritating but non-hazardous fumes in facilities where an in-house HVAC system cannot be accessed.

Biosafety Cabinets

Biological Safety cabinets combine design aspects of both laminar flow and fume hoods. Filtered air is directed downward onto the work surface and then travels into a plenum through openings on the front and sides of the hood. Depending on the classification of the biosafety hood, some percentage of air is recirculated through a HEPA filter while the rest is directed out of the hood through an exhaust system. Thus, biosafety cabinets offer operator, environmental and product protection.

These laboratory safety cabinets (sometimes called IV hoods or compounding hoods) are ideal when preparing sterile medications such as chemotherapeutic agents that may pose a risk to the operator.

BSCs, BSLs, and ISO Classes

When it comes to working with hazardous or potentially infectious material, protecting personnel must be the primary concern. However, offering personnel protection does not have to come at the cost of risking product integrity. Class II BSCs provide protection to both personnel and product simultaneously. They maintain an ISO class 5 clean work area for product manipulation, while ensuring that exhaust air is filtered and ducted out of the environment. Thus, a class II BSC is the ideal solution when working with moderately hazardous material and both personnel and product safety are required.

Read more about these lab hoods here regarding their biological safety rating

Long Running FFU Motors

Terra’s filter fan unit motors are rated for 5 years of continuous, 24/7 operation, if the HEPA filters are consistently replaced. To accurately monitor your HEPA filter’s saturation levels, purchase Terra’s audible and visual filter replacement alarm system.

Recessed Lighting and Optional UV-C Sterilization

Included recessed light fixture simplifies cleaning and minimizes airflow disruptions (shown next to optional UV sterilization bulb).

Touchscreen Control Panel

PLC control panel provides control of fan speed, lights, and motorized shield; digital gauge monitors backpressure and issues alerts when filter(s) need replacement

Room-Side Replaceable HEPA Filter

To simplify filter replacement, HEPA filters can be removed and replaced while the FFU remains installed; the gel-sealed filter seats securely against the "knife-edge" on the blower housing to form a tight seal.

Vertical Flow of HEPA-Filtered Air Meets ISO 5 Particle Requirements

Side panels and access shield optimize unidirectional flow of HEPA-filtered air; advanced baffling technology ensures uniform face velocity to meet ISO 5 particle requirements.

Motorized Access Shield

Motorized access shield, included on select models, enhances laminar flow and protects operator from chemical fumes and other environmental nuisances.

Integrated Stands Isolates Hood from Work Surface

Built-in stand with dissipative PVC side panels allows VLF Stations to be positioned over any table or processing equipment without transferring hood vibration to work surface (shown integrated with optional modular wet station).

Clean and Durable Powder Coat Finish

Terra’s signature white powder coat finish provides a high quality, durable barrier to protect against corrosion, plus a clean and attractive aesthetic. The advanced heat-fused formulation exceeds ASTM and ISO paint standards to resist chipping, scratching, fading, and wearing.

WhisperFlow Quiet Operation Reduces Distracting Background Noise

Exposure to loud noises can lower the ability to focus on work and listen selectively, which may also lead to safety issues. Typical AC units can be annoyingly loud, measuring in the range of 70 dB (comparable to a vacuum cleaner). Terra’s WhisperFlow design produces far lower noise levels for a quiet environment comparable to a library. At 90 ft/min output, units measure under 50 dB from only 1 ft away (roughly 75% quieter than 70dB).

Continuous Product Improvement

At Terra, we strive to develop and produce the highest quality products for our customers to improve health, safety, performance, and yields. Our product quality is enabled by high-grade manufacturing equipment and processes, 45 years of engineering and application expertise, and our commitment to continuously improve.

Long-Term Customers

Terra is committed to building long-term relationships with satisfied clients; 94% of orders each year come from repeat customers

4,000 Worldwide Cleanrooms

Since 1976, Terra has designed and manufactured over 4,000 cleanrooms for companies at the leading edge of high technology

What Type of Laboratory Water Do I Need?

Water’s ability to dissolve compounds, along with its polarity, bonding, melting, boiling and freezing points, heat absorption, and vaporization characteristics arguably make it the most versatile substance we know. It’s also ubiquitous and plentiful: the earth can’t live without it, most plants and animals can’t exist without it, and scientists can’t operate labs without it.

Water is the most common reagent used in the laboratory, and while water quality can often be overlooked, the grade of water being used in an application is critical. Minute traces of salts or biological contaminants can result in unfortunate consequences when culturing cells or performing analytical measurements of biological macromolecules.

Water, water everywhere, but is any of it good enough for sample analysis?

Water, water everywhere, but is any of it good enough for sample analysis?

With that being said, how is water quality measured and how do researchers determine the purity of water necessary for their process? Water quality is measured by examining a set of parameters from a water sample and comparing that to set values to achieve a water purity rating. These ratings were established by the international rating organization ASTM and ranked from Type 1 (the most pure) to Type 4 (the least pure). Let’s look at specifications that scientists measure to determine a purity rating:

Resistivity: Resistivity is a measurement of water’s ability to resist or conduct an electrical charge. Pure water has a resistance of 18.2 MΩ × cm at 25°C. The resistance of water can be easily and inexpensively monitored in a laboratory. As the level of ionic impurities (salts from minerals in the earth’s crust) increases in water, the resistivity decreases. Resistivity will only measure ionic impurities and does not account for organic compounds from biological contaminants.

Total Organic Carbon (TOC): TOC is a measurement of the amount of organic carbon that is found in a water sample. The measurement is calculated from the total carbon in a water sample, subtracting out inorganic carbon (from dissolved carbon dioxide and carbonic acid salts) to arrive at the TOC Count.

The TOC level can be affected by a host of contaminants in a water sample, such as decomposing biological material, bacterial growth or the chemical activity (metabolism) of living organisms. High TOC measurements can be indicative of bacterial biofilm growth within a water supply or other upstream biological contamination. TOC is typically measured in parts per billion (ppb), with Type 1 water systems having less than 10 ppb.

Bacteria: Bacteria are a common source of water contamination and often included in the measurement of laboratory water quality. The number of bacterial cells with the potential to multiple and grow in the water is counted and reported as colony forming units (CFUs) per unit volume (ml). For Type 1 water systems, 1 ml of water must form fewer than 10 bacterial colonies.

Endotoxins: Endotoxins are lipopolysaccharide molecules released when bacterial cells die. Results of in vivo and in vitro experiments are negatively impacted when they are present, and labware is easily contaminated. Thus, measuring the amount of these toxins in a laboratory water system is significant when measuring water purity. Type 1 water quality systems typically have measurements of less than 0.03 Endotoxin Units per ml of water.

Level of Contaminants in Different Water Purity Types*

Water grade table

*According to ASTM Standards for Laboratory Reagent Water (ASTM D1193-91)

Water Quality Type by Applications

The National Institute of Health (NIH), Division of Technical Resources has released guidelines that detail the type of water purity system that should be used in various scientific disciplines and for specific applications. While Type 3 water is considered usable for autoclaving, glassware rinsing or washing and water baths, Type 1 and Type 2 water are indicated for most laboratory procedures. Type 2 water is generally suited for reagent and buffer mixtures in addition to cultured media preparation. Type 1 water is reserved for the most sensitive processes, such as High Performance Liquid Chromatography (HPLC) and trace analysis. The type of water required for a given application can be found summarized in this NIH table*:

NIH water chart

*RO is Reverse Osmosis, which can effectively remove bacteria and other contaminants, but not dissolved gasses.

Water is more complicated than simple hydrogen and oxygen. Like any chemical used in the laboratory, it has classifications and application-specific forms. Researchers should consider their analytical tasks and have the recommended water type on hand.

Learn more about water purification systems offered at Laboratory-Equipment.com.

Popular Accessories

For a full list of accessories, select a product then click Choose Accessories on that product page.
  • UV Germicidal Lamp
    The V-Ray germicidal UV lamp is installed within a Terra hood to inhibit microbial growth on the work surface
  • Static-Neutralizing Ionizing Bar
    Airflow from the blower distributes positive and negative ions onto the surfaces below, neutralizing static charges that can lead to electro-static discharge and attract particles.
  • HEPA Filters Capture Micro-Contaminants
    HEPA (High-Efficiency Particulate Air) Filters rated 99.99% efficient with particles 0.3 microns and larger in diameter.
  • Lighthouse Handheld Airborne Particle Counters
    Lightouse portfolio of handheld airborne particle counters ensure accurate readings of cleanrooms and critical environments
  • Isolated Work Surfaces in Many Materials
    Tables in many styles and materials, including dissipative laminate, chemical-resistant polypropyene and epoxy resin, are isolated from hood to reduce vibration (shown: solid stainless steel top with adjustable powder-coated legs).
  • Work Station Drawers
    Available in ABS plastic or stainless steel, these cleanroom-compatible drawers come in a number of sizes and drawer configurations (6” top drawer and 6” bottom drawer shown).
  • Explosion-Proof Fan Filter Unit for Hood
    UL-listed, NEC Class I, Division 1 Explosion Proof fan/filter unit provides HEPA filtration where solvent vapors, dust and other flammable hazards are present; all conduit and switches also meet explosion-proof requirements.
  • Explosion-Proof 40W LED Light
    UL-listed for Class I, Division 1 and 2, Groups C and D areas, this low profile LED light produces 3,600 lumens and operates from 120 to 277VAC, 50/60Hz. The heat-dissipating housing increases the efficiency and lifespan of the LEDs.
  • Explosion-Proof Power Switches
    UL-rated explosion-proof switches are connected to the lights and blowers using specialized conduit with potted fittings. All electrical components are sealed to eliminate potential ignition points.

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