Terra Part # 1539-09
$218
Usually ships in 15-25 business days

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• Scratch-, chemical-, corrosion-, and impact-resistant polycarbonate construction

• Bowl-shaped bottom contains spills and allows nesting for compact storage

• Lightweight with molded handles for portability

• Openings in the lower half of the unit provide two-handed access to the interior; lift off top half for placement of large objects

• Top half can be nested into the bottom for space saving storage

Frame Material: Powder-Coated Steel

Work Area Dimensions: 20"W x 20"D

Dimensions, Product: 22" W x 22" D x 22" H

Dimensions, Shipping: 22" W x 22" D x 14.25" H

Weight, Shipping: 11 lb

Package Type: Box

Unit of Measure: EA

Laminar Flow Hoods

  • Bel-Art Clear View Fume Hood Bel-Art Clear View Fume Hood
  • Bel-Art Clear View Fume Hood (2 X 1) Bel-Art Fume Hood
  • Bel-Art Clear View Fume Hood With Model Bel-Art Clear View Fume Hood
Bel-Art Clear View Fume Hood
Bel-Art Clear View Fume Hood (2 X 1)
Bel-Art Clear View Fume Hood With Model

Features and Benefits

Ductless Exhaust Alternative

Ductless Fume Hoods: An Alternative to Laboratory Exhaust Systems

Exhaust Fume Filtration

Activated charcoal, the most common purification filtration medium, adsorbs chemicals with a molecular weight above 30 and a boiling point above 60°C. Carbon filters are also effective with many other chemicals because of their particular molecular structure.

Adsorption takes place in the active filter zone, the small cross-section of the filter bed in which the material to be removed comes in contact with the filtering medium. This active filter zone moves upward as the filter becomes saturated (see illustration). When it reaches the filter's top surface, there is an initial breakthrough by the contaminant gas; thereafter the percentage of contaminant gas that escapes filtration increases until total saturation of the filter is reached.

Ductless fume hoods manufactured by Terra use activated carbon filters to eliminate most nuisance fumes and can be used in conjunction with HEPA filtration. For more hazardous chemicals like strong acids and bases, specialized Labconco filtered fume hoods can be equipped with a wider range of filters and include an array of safety sensors for breakthrough detection.

Enhancing Filter Performance

To optimize filtration efficiency, any ductless exhaust fume system must ensure that the exhaust stream is exposed to the purification medium for an adequate time. Terra exhaust purification systems satisfy this condition in several ways.

First, our specially selected impeller ventilators are designed to ensure the optimal linear velocity of the airstream—sufficient to maintain a negative pressure in the work area that prevents backflow, but low enough to allow adequate adsorption of fumes by the filtering medium. Our pre-filters also extend exposure time by reducing the airflow through the filter.

Monitoring Filter Effectiveness

A ductless exhaust fume system needs to be monitored in two areas. The user must detect the period between initial contaminant breakthrough and the point at which the contaminant gas reaches the Threshold Limit Value (TLV) for that substance. The velocity of the airstream must also be monitored to ensure an adequate negative pressure and to detect ventilator failure.

Through periodic testing of the exhaust airstream, you can determine the useful filter life in your particular application and gauge filter effectiveness with an elapsed time meter.

An electronic airflow velocity monitor also helps users ensure safe, effective operation and provides an alarm when velocity falls below a user-defined threshold.

Put Safety First!

Avoid filter use in applications involving very toxic substances, very high volumes of contaminants, and unknown or highly volatile chemical reactions. Always make sure that filters are promptly changed when the Threshold Limit Value (TLV) has been reached for any contaminant gases present.

On a tight schedule? Choose FasTrak 24/7 Priority Service to help meet your critical schedule for Terra-manufactured products, either before or after your order is placed.*

  • FasTrak 24/7 provides a 24/7 commitment to meet the shipping date YOU specify, regardless of quoted lead times.
  • FasTrak 24/7 assigns a dedicated production team plus a dedicated senior expeditor working three shifts to meet your delivery specification.
  • FasTrak 24/7 guarantees* to meet the agreed-to specified ship date.

Call for pricing. FasTrak service fees cover costs of additional services only, without additional profit.

 * Terra's FasTrak services limited guarantee: to ship on the ESD or date specified OR to refund up to 100% of FasTrak charges. This guarantee covers no direct, special, consequential or other damages and is strictly limited to up to 100% of the amount paid for FasTrak service. When a specified ship date is missed due to factors outside Terra's control (vendor performance, deliveries by shipping companies, etc.) and random factors such as accidents, the credit of up to 100% of the FasTrak 24/7 may not apply. FasTrak service requested after order placement will be quoted and accepted based on available time remaining before required ship date.

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