HomeProductsVentilated Enclosures & ExhaustersBalance, Bulk Powder & Equipment EnclosuresXPert Filtered Balance Systems3950461

4' XPert Filtered Balance System, Tall with Guardian Airflow Monitor

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Catalog Number: 3950461

Key features
  • Region: U.S. and Canada
  • Blower Requirements: Contains built-in blower and exhaust HEPA filter
  • Type: Balance Enclosure
  • Width: 4'
  • With Built-In HEPA Filtration: Yes

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  • Weight: 300.0 lbs
  • Weight metric: 136.0 kg
  • Dimensions: 48.0" w x 29.0" d x 46.3" h
  • Electrical: 100-115 V, 60 Hz, Domestic
  • Region: U.S. and Canada
  • Airflow Monitor: Guardian
  • Blower Requirements: Contains built-in blower and exhaust HEPA filter
  • Conformance: ANSI Z9.5, CAN/CSA C22.2, ETL, Modified ASHRAE 110, SEFA 1, UL
  • Lighting: Fluorescent lamp
  • Sash Opening Height: 9.4" (23.9 cm)
  • Type: Balance Enclosure
  • Width: 4'
  • With Built-In HEPA Filtration: Yes

XPert Filtered Balance Systems provide user protection by keeping powders and particulates contained during weighing procedures. The built-in blower and exhaust HEPA filter mounted in the upper plenum take up less space than a separate exhauster would require, and isolation supports minimize blower vibration. Since HEPA filtered air is returned to the laboratory, these vented balance enclosures offer the added benefit of low installation costs and require no ducting to the outside. Interior dimensions accommodate large micro and analytical balances. Containment-enhancing features ensure that potent powders frequently found in pharmaceutical, dry chemical, mold and asbestos weighing operations are kept away from the operator.


  • Deep 23" or 30" interior to accommodate large micro and analytical balances
  • Ergonomic air foil with aerodynamic Clean-Sweep airflow openings
    • Upper dilution air supply
    • Upper containment sash foil
    • Zone-perforated rear baffle
    • Side-entry air foils
  • Exhaust HEPA filter, 99.99% efficient on particles 0.3 micron in size
  • True bag-in/bag-out filter disposal system
  • Built-in blower with dynamically-balanced, vibration-isolated motorized impeller
  • Intrinsically-safe, negative pressure design
  • Minihelic pressure gauge
  • Space-saving design. No separate filtered exhauster is required.
  • Upper diffuser screen
  • Quiet operation from 48-66 db(A) depending on airflow
  • Glacier white and gray, dry powder epoxy-coated aluminum frame and steel rear plenum and baffle. No unreliable plastic-to-plastic bonding is used.
  • Pre-wired fluorescent lamp and switches for blower and light
  • Speed control
  • 1/4" thick tempered safety glass front sash and sides
  • 9.4" or 12.0" high sash opening
  • Ergonomic 10 degree angled and hinged sash that pivots upward, locks for loading and has a wiping seal to contain contaminants
  • Two utility ports
  • Particulate containment independently verified by SafeBridge Consultants, Inc.


  • 2', 3', 4', 5' and 6' widths
  • International electrical configuration.
  • Built-in Guardian 1000 Digital Airflow Monitor or Guardian Airflow Monitor

Required Accessories

  • Work surface
  • Supporting base
  • Carbon Filters for Some Models (see brochure)


Optional Accessories

  • Trace Odor Carbon Filters
  • Utility Shelves
  • Canopy Connections for outside ducting
  • Remote Blowers for outside ducting
  • Ductwork for outside ducting


XPert Balance & Bulk Powder Enclosures Catalog

Contains information on XPert Filtered Balance Systems, XPert Filtered Balance Stations, XPert Balance Enclosures, XPert Bulk Powder Filtered Systems, XPert Bulk Powder Filtered Stations, XPert Bulk Powder Enclosures, XPert TXE Equipment Enclosures, and Accessories including FilterMate Portable Enclosures.

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Compounding Pharmacy Solutions Brochure

Contains information related to selection of enclosures best suited for sterile and non-sterile compounding per U.S. Pharmacopoeia (USP) chapters <795>, <797> and <800>.

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Calibrating the Guardian 1000 Airflow Monitor - Protector Fume Hoods

XPert Balance Enclosures, Systems and Stations

Video detailing the features, benefits and proper use and maintenance of Labconco's XPert Balance Enclosures, Filtered Balance Systems and Filtered Balance Stations. 

User's Manuals

XPert and RXPert Filtered Balance Systems and Stations Manual

For catalog numbers: 3940200, 3940201, 3940202, 3940220, 3940221, 3940222, 3940300, 3940301, 3940302, 3940320, 3940321, 3940322, 3940400, 3940401, 3940402, 3940420, 3940421, 3940422, 3950200, 3950201, 3950202, 3950220, 3950221, 3950222, 3950300, 3950301, 3950302, 3950320, 3950321, 3950322, 3950400, 3950401, 3950402, 3950420, 3950421, 3950422.

Also for XPert Bulk Powder Filtered Systems catalog numbers: 3961500, 3961501, 3961502, 3961520, 3961521, 3961522, 3961600, 3961601, 3961602, 3961620, 3961621, 3961622.

And for XPert Bulk Powder Filtered Stations catalog numbers: 3962500, 3962501, 3962502, 3962520, 3962521, 3962522, 3962600, 3962601, 3962602, 3962620, 3962621, 3962622.

Also for RXPert Line of Filtered Balance Systems catalog numbers: 3971200, 3971201, 3971202, 3971300, 3971301, 3971302, 3971400, 3971401, 3971402.

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Installation Qualification/Operation Qualification

Installation Qualification/Operation Qualification for XPert Balance Stations and Balance Systems

For validation of predetermined XPert Filtered Balance Stations and XPert Filtered Balance Systems. Provides a checklist of installation and operation qualifications to complete when beginning operation of new or used XPert Filtered Balance Station or XPert Filtered Balance Systems manufactured 2004 or later.

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3-Part Specs

XPert Filtered Balance Systems Specifications

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Declarations of Conformity

CE Declaration of Conformity - XPert Balance Systems and Stations

Declaration of Conformity for applicable models of XPert Balance Systems and Stations

View PDF (379.6 KB)

CE Declaration of Conformity - XPert Balance Systems and Stations

For 39502 Series, 39503 Series, 39504 Series, 39505 Series, and 39506 Series XPert Filtered Balance Systems and 39402 Series, 39403 Series, 39404 Series, 39465 Series, and 39466 Series XPert Filtered Balance Stations

View PDF (95.3 KB)
Ducting Supplies

Ductwork and Blower Accessories

Labconco offers a full line of ductwork, filter packs and transition pieces to complete your exhaust system.