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Labconco XPert 3940402 4' Filtered Balance Station
The Labconco XPert 3940402 4' Filtered Balance Station is a ventilated balance enclosure designed to protect laboratory personnel during weighing, transfer, and handling of powders and other airborne particulates. Available used and refurbished from American Instrument Exchange, this specialized containment enclosure combines a spacious balance work area with HEPA-filtered exhaust and carefully controlled airflow, making it particularly well suited for pharmaceutical research, formulation laboratories, analytical laboratories, and other facilities performing precision powder weighing.
Unlike a conventional chemical fume hood, the XPert Filtered Balance Station is specifically designed around the needs of analytical and microbalance applications. Its approximately 23.4-inch-deep interior provides room for larger analytical balances while the enclosure's airflow system helps contain particulates generated during weighing and transfer operations.
Catalog number 3940402 is a 4-foot-wide, 115 V configuration equipped with Labconco's Guardian 1000 Digital Airflow Monitor. The enclosure measures approximately 48" W × 29" D × 38.3" H externally and provides an interior work area approximately 45.6" W × 23.4" D × 22.7" H.
Key Features
Used and refurbished Labconco XPert Filtered Balance Station
Catalog number 3940402
4-foot-wide ventilated powder weighing enclosure
Designed to protect personnel during powder weighing and transfer operations
Spacious 45.6" W × 23.4" D interior work area
Designed for analytical and microbalance applications
99.99% efficient exhaust HEPA filtration
Guardian 1000 Digital Airflow Monitor
Clean-Sweep ergonomic air foil
Zone-perforated rear baffle for controlled airflow through the enclosure
Angled, hinged tempered safety-glass sash
Two utility ports for routing electrical cords and tubing
Bag-in/bag-out filter disposal design
115 V, 60 Hz electrical requirements
Designed for connection to a remote blower and ductwork
90-day warranty included from American Instrument Exchange
Designed for Powder Weighing and Analytical Balances
Precision weighing presents a unique containment challenge. Fine powders can become airborne during container opening, scooping, transfer, weighing, and cleanup, potentially exposing operators and contaminating surrounding laboratory surfaces.
The Labconco XPert 3940402 is designed specifically to address this problem. Rather than functioning as a general-purpose chemical fume hood, the enclosure provides a controlled work area for balances and powder-handling procedures while drawing airborne particulates away from the operator.
Its approximately 23.4-inch-deep interior accommodates many analytical and microbalances while leaving room for weighing vessels, powder containers, spatulas, and other accessories required during sample preparation.
This combination makes the XPert particularly valuable for pharmaceutical, biotechnology, chemical, and research laboratories where accurate weighing and personnel protection must coexist at the same workstation.
Airflow and Particulate Containment
The XPert Filtered Balance Station incorporates multiple airflow-management features designed to promote containment without unnecessarily disrupting the work area.
An ergonomic front air foil with Clean-Sweep airflow openings helps direct room air into the enclosure, while side-entry air foils, an upper containment sash foil, upper dilution air supply, and zone-perforated rear baffle help distribute airflow through the work area and toward the exhaust system.
The rear baffle is designed to establish horizontal airflow through the enclosure, helping move airborne particulates away from the operator and toward the exhaust HEPA filter.
Because analytical balances can be sensitive to drafts and changes in air movement, the XPert's specialized design provides a more appropriate environment for contained weighing than attempting to perform precision balance work inside a conventional high-volume chemical fume hood.
HEPA-Filtered Exhaust
The Labconco XPert 3940402 is designed with a 99.99% efficient exhaust HEPA filter to capture airborne particulates before exhaust air leaves the enclosure.
A true bag-in/bag-out filter disposal system is incorporated into the design to help reduce operator exposure when a loaded filter must eventually be removed and replaced.
The enclosure requires connection to appropriate ductwork and a remote exhaust blower. The remote blower is not included unless specifically stated by American Instrument Exchange and should be sized according to the enclosure, duct configuration, and facility requirements.
Because HEPA filtration is intended for particulate containment rather than removal of chemical vapors, laboratories should evaluate the materials being handled before selecting this enclosure for a particular procedure.
Guardian 1000 Digital Airflow Monitor
Catalog number 3940402 includes Labconco's Guardian 1000 Digital Airflow Monitor. The monitor provides the operator with information about airflow conditions so changes that could affect containment can be identified during operation.
Airflow monitoring is particularly valuable in powder weighing applications because effective personnel protection depends on maintaining the appropriate inward airflow through the front opening.
The monitoring system therefore provides an additional level of operational awareness compared with a basic balance enclosure without active airflow indication.
Sash and Work Area Access
The XPert 3940402 uses an angled tempered safety-glass sash that provides clear visibility into the weighing area while helping maintain the controlled opening required for normal operation.
The nominal working sash opening is approximately 9.4 inches. For loading balances, containers, or other equipment, the hinged sash can be raised to provide substantially greater access to the interior.
Tempered safety-glass sides further improve visibility into the work area, while two utility ports allow balance power cords and other connections to be routed into the enclosure without unnecessarily interfering with the primary work opening.
Common Applications
The Labconco XPert Filtered Balance Station is particularly well suited for procedures involving fine powders and other particulates where personnel exposure must be controlled. Typical applications include pharmaceutical formulation, analytical sample preparation, weighing active or inactive powder ingredients, chemical research, powdered reagent preparation, quality control testing, and small-scale powder transfer.
It can also provide a dedicated contained weighing workstation for research facilities where balances are used repeatedly for potentially dusty materials.
The suitability of the enclosure for a specific compound should always be determined through an appropriate laboratory risk assessment.
Ideal Laboratory Environments
The XPert 3940402 is an excellent fit for pharmaceutical research and development laboratories, formulation laboratories, biotechnology facilities, analytical chemistry laboratories, quality control laboratories, chemical research facilities, university research laboratories, and other environments where precision weighing and particulate containment are both important.
Its 4-foot width provides substantially more working room than a small balance enclosure while remaining compact enough to integrate into existing laboratory layouts.
Key Specifications
Specification
Details
Manufacturer
Labconco
Product Line
XPert Filtered Balance Station
Model / Catalog Number
3940402
AIE Product Code
2864AA HOOD
Nominal Width
4 feet
Exterior Dimensions
48" W × 29" D × 38.3" H
Interior Dimensions
45.6" W × 23.4" D × 22.7" H
Interior Depth
23.4"
Working Sash Opening
Approx. 9.4"
Maximum Loading Opening
Approx. 19"
Sash
Angled, hinged tempered safety glass
Exhaust Filtration
99.99% efficient HEPA
Airflow Monitor
Guardian 1000 Digital
Exhaust Collar
Approx. 6.06" ID
Utility Access
Two utility ports
Electrical
115 V, 60 Hz
Weight
Approx. 270 lb
Remote Blower
Required; not included unless specified
Ductwork
Required
Condition
Used and refurbished
Warranty
90 days
Installation and Exhaust Considerations
The XPert 3940402 is a vented balance station and requires appropriate ductwork and a remote exhaust blower. Blower selection should account for the required enclosure airflow, duct diameter and length, bends and transitions, building exhaust configuration, and other sources of static pressure.
Laboratories should also consider the location and stability of the work surface supporting the enclosure. Precision analytical balances perform best on rigid, level surfaces with minimal vibration, so the supporting bench or balance table is an important part of the overall installation.
Before placing the enclosure into service, the complete system should be evaluated to verify appropriate airflow and containment performance.
Choosing a Filtered Balance Station vs. a Chemical Fume Hood
A filtered balance station and a chemical fume hood address different laboratory hazards.
The XPert 3940402 is specifically designed around powder weighing and particulate containment. Its HEPA exhaust filtration captures airborne particles while its work area and airflow design accommodate analytical and microbalances.
A conventional chemical fume hood is generally a better choice when the primary hazard consists of volatile chemical vapors or gases rather than particulates.
For laboratories routinely weighing fine powders, a purpose-designed balance enclosure can provide a more suitable combination of personnel protection, workspace organization, and balance compatibility than using a conventional chemical fume hood for the same task.
Refurbishment and Testing
This Labconco XPert 3940402 is inspected and refurbished by American Instrument Exchange before shipment. Our technicians inspect the enclosure, sash, airflow components, electrical functions, lighting, airflow monitor, and other operating features as applicable to the individual unit.
The condition and configuration of the filtration system should be confirmed before purchase, particularly when the enclosure will be used with hazardous powders. Final airflow verification should be performed after installation with the enclosure connected to its intended blower and ductwork.
Why Buy a Refurbished Balance Enclosure from American Instrument Exchange?
Purchasing a refurbished filtered balance station can provide laboratories with specialized powder containment at substantially lower cost than outfitting a new weighing workstation.
American Instrument Exchange supplies refurbished laboratory containment equipment as well as analytical and precision balances, allowing laboratories to source both the weighing instrument and the enclosure required for a complete powder weighing workstation.
Whether a laboratory needs a dedicated analytical balance enclosure, a larger powder containment station, a chemical fume hood, or another form of laboratory containment, American Instrument Exchange can help identify equipment appropriate for the intended workflow.
This Labconco XPert 3940402 includes a 90-day warranty from American Instrument Exchange.
Frequently Asked Questions
What is the Labconco XPert 3940402 designed for?
The XPert 3940402 is designed primarily for contained powder weighing and transfer operations. Its large interior accommodates analytical and microbalances while controlled airflow and HEPA-filtered exhaust help protect personnel from airborne particulates.
Is the XPert 3940402 a chemical fume hood?
No. It is a filtered balance station specifically designed for powder and particulate containment. A conventional chemical fume hood is generally more appropriate when volatile chemical vapors or gases are the primary hazard.
Can an analytical balance be used inside the enclosure?
Yes. Analytical and microbalance applications are a primary purpose of the XPert Filtered Balance Station. Its 23.4-inch-deep interior is specifically designed to accommodate larger laboratory balances.
What does the Guardian 1000 Digital Airflow Monitor do?
The Guardian 1000 monitors airflow conditions within the enclosure and provides the operator with an indication of airflow performance. This helps identify conditions that could compromise containment during weighing procedures.
Does the Labconco XPert 3940402 include HEPA filtration?
The 3940402 is designed with a 99.99% efficient exhaust HEPA filtration system. Because this is a used and refurbished unit, buyers should confirm the filter supplied with the specific enclosure before purchase.
Does this balance station require an external blower?
Yes. The XPert Filtered Balance Station requires ductwork and a properly sized remote blower. These components are installation-specific and should not be assumed to be included unless stated by American Instrument Exchange.
Can the XPert be used for solvent weighing?
The enclosure's standard HEPA filtration is intended for particulates, not chemical vapors. Applications involving volatile solvents or other vapor hazards require additional evaluation and potentially a different containment or filtration configuration.
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Testing Procedures for Used and Refurbished Laboratory Equipment
Ensure Accuracy, Safety, and Dependable Performance Across Applications
At American Instrument Exchange, all used and refurbished laboratory equipment undergoes a rigorous, multi-point testing protocol to ensure optimal performance, operational safety, and long-term reliability. Whether the equipment is destined for research, diagnostics, quality control, or production environments, our thorough inspection and testing process is designed to meet the highest standards of laboratory excellence.
Why Testing Used Lab Equipment Is Essential
Before any refurbished laboratory equipment is returned to service, it must be carefully tested to verify:
• Functional integrity and operational performance
• Setpoint accuracy and repeatability (where applicable)
• User interface responsiveness and control features
Proper testing reduces the risk of equipment failure, measurement inaccuracies, or user hazards—helping to ensure consistent results in clinical, academic, biotech, and industrial labs.
Our standardized lab equipment testing procedures are tailored to each equipment type, ensuring every unit meets manufacturer specifications and industry benchmarks.
Key Testing Procedures for Refurbished and Used Laboratory Equipment
1. Initial Visual Inspection
• Examine equipment housing for signs of wear, corrosion, or damage
• Check ports, power cords, and exterior components for tampering or deterioration
• Verify that internal and external parts (racks, shelves, connectors, accessories) are present and undamaged
2. Functional Startup and Operational Testing
• Power on the equipment and verify startup diagnostics
• Confirm functionality of displays, buttons, switches, and control panels
• Run basic functions to confirm proper response and behavior under standard operating conditions
3. Testing and Performance Verification
• Test internal sensors or control systems using industry-standard tools
• Perform operational tests to validate accuracy and consistency
• Verify key performance specifications such as temperature control, timing, speed, or measurement outputs, depending on equipment type
4. Mechanical and Electrical System Testing
• Evaluate motors, pumps, fans, or other moving parts for smooth operation
• Inspect and test wiring, relays, fuses, and circuit boards for safety and reliability
• Test power delivery and grounding compliance
5. Safety and Compliance Checks
• Ensure equipment is grounded and insulated to meet laboratory safety standards
• Test alarms, interlocks, emergency stops, or safety shutdown systems if applicable
6. Final Quality Assurance and Documentation
• Perform extended runtime testing
• Document operational logs, testing results, and any repairs or adjustments made
• Complete a final inspection, thorough cleaning, and packaging for delivery
Trusted Quality from American Instrument Exchange
With over 50 years of experience in laboratory equipment refurbishment, American Instrument Exchange is committed to delivering certified, lab-ready instruments backed by expert testing. Our testing protocols ensure that each piece of equipment—regardless of type—is safe, accurate, and dependable from day one.
Whether you're equipping a startup lab or expanding a high-throughput facility, you can count on our refurbished laboratory equipment to perform with precision and reliability.
Refurbishment Protocol for Used Laboratory Equipment from American Instrument Exchange
At American Instrument Exchange, every piece of used laboratory equipment we offer undergoes a multi-step refurbishment process. Whether it's an analytical balance, centrifuge, freezer, oven, or any other essential lab instrument, our goal is to restore each unit to peak performance—ensuring accuracy, safety, and long-term reliability in scientific, clinical, industrial, and academic environments.
Why Choose Refurbished Lab Equipment from American Instrument Exchange?
• Thoroughly tested for performance, precision, and safety
• Backed by a warranty
• A cost-effective alternative to new equipment
• Environmentally sustainable through equipment reuse and waste reduction
• Serviced by expert technicians with decades of laboratory equipment experience
Step-by-Step Refurbishment Protocol
Every instrument and system refurbished at American Instrument Exchange follows a detailed, industry-aligned process:
1. Initial Intake & Inspection
• Complete visual and structural inspection for cosmetic damage, wear, or corrosion
• Mechanical assessment of hinges, seals, fasteners, motors, and moving parts
• Missing components and damaged items are documented for repair or replacement
2. Cleaning and Decontamination
• Full internal and external cleaning using non-abrasive, lab-safe solutions
• Removal of biological, chemical, or particulate contamination
• Disassembly and cleaning of removable parts such as trays, shelves, and filters
3. Mechanical and Electrical Repair
• Replacement or repair of worn or broken mechanical parts
• Evaluation and servicing of control panels, sensors, switches, and displays
• Testing and repair of electrical wiring, fuses, circuit boards, and power supplies
4. Functional System Testing
• Assessment of all major functions specific to the equipment type (e.g., speed, temperature, force, weight, timing)
• Operation of control interfaces, programming menus, and digital displays
• Verification of stabilization time, responsiveness, and user input reliability
5. Testing and Performance Verification
• Testing of internal sensors, controllers, and measurement systems using certified tools
• Multi-point testing to ensure repeatability, accuracy, and performance consistency
• Confirmation of user-defined setpoints, timing sequences, or programmable cycles
6. Safety and Compliance Checks
• Testing of safety interlocks, alarms, and over-limit protection systems (as applicable)
• Electrical safety inspections, including grounding and insulation verification
7. Final Quality Assurance and Documentation
• Full operational testing under simulated lab conditions
• Completion of performance benchmarks, testing results, and repair logs
• Final cleaning and visual inspection
Trust the Experts at American Instrument Exchange
With over 50 years of experience in the laboratory equipment industry, American Instrument Exchange is a trusted leader in high-quality refurbished lab instruments. Our refurbishment protocols ensure that every piece of equipment we sell is lab-ready—offering the precision, performance, and durability your team can count on.
Whether you’re outfitting a new lab or expanding an existing operation, choose American Instrument Exchange for tested, warrantied, and cost-effective laboratory equipment.
Warranty Information
All used equipment sold by American Instrument Exchange is refurbished/reconditioned, tested to meet specifications, cleaned, and comes with a 90-day warranty from the date of shipment unless otherwise specified. New products include a warranty from the manufacturer. Your warranty is only valid if you have paid your invoice. If your invoice is over 30 days old, warranty work will not be performed until your invoice is paid in full. American Instrument Exchange is not liable for any special or consequential damages that result from the use of, or the inability to use, the materials on this site or the performance of the products,
Exceptions include international sales and items that are agreed to be sold with a lesser warranty or items that are agreed to be sold “as is.”
Should there be visible shipping damage to packaging or concealed shipping damage to item(s) supplied, buyer must communicate such damage to the delivering entity or carrier upon receipt first and to American Instrument the same day item is accepted / signed for. Failure to do so voids warranty. Customer decision to involve / procure third party or OEM service other than American Instrument or AIE assigned vendors to resolve in-warranty instrument failure or defect without first placing a service call to American Instrument voids warranty.
Return & Cancellation Policy
American Instrument Exchange will authorize the return of and issue a full refund for any equipment that is not working as represented and could not be replaced or repaired to the customer’s satisfaction by AIE or a representative of AIE during the warranty period. Returns without prior authorization and an RMA number will not be accepted.
Customers are responsible for proper packaging of the equipment and all included accessories. American Instrument will pay for insurance and shipping costs. Non-inventory items bought specifically to fill customer orders may possibly be returned, but on a case by case basis.
Customers who cancel orders after refurbishing has begun or after delivery where there are no equipment performance issues may be subject to a Restocking/Cancellation Fee of 20% or more and responsible for shipping costs for both the delivery and return.
Ongoing and Extended Support Options
American Instrument Exchange is able to provide additional repair and support services outside the warranty terms for most products that sell.
For biosafety cabinets, clean benches, chemical fume hoods, and other clean air products our team at AIE Laboratory Services can provide certifications, repairs, decontaminations, and other services for customers throughout New England, and guidance and limited technical assistance for any customers in the US and Canada for new or refurbished biosafety cabinets purchased from American Instrument Exchange.
For all other products, the repair service team at American Instrument Exchange can provide both field and depot repair evaluations. We can easily schedule and coordinate the pick-up and transportation of your malfunctioning equipment. By offering hourly rates lower than most OEM service providers and eliminating travel time for technicians, we help reduce repair costs. Furthermore, our lab depot repair service minimizes or eliminates scheduling delays. Our experienced service technicians are qualified to restore your equipment to factory specifications.
Yes, all equipment from American Instrument Exchange comes with a warranty. Used/reconditioned/refurbished equipment is tested to make sure it operates to the manufacturer's specifications and comes with a 90-day warranty (unless otherwise noted). New equipment comes with a warranty from the manufacturer.
How do you test and recondition the equipment?
Testing requirements vary across all the equipment categories we sell. Temperature controlled units are tested with NIST traceable probes and data loggers. Gaskets, external housing, glass, handles, controls and control screens are all thoroughly inspected for integrity and functionality. We test all equipment using the manufacturer's parameters and specifications to confirm that the unit operates properly.
How do products ship from American Instrument Exchange?
We can ship products both nationally and internationally using a well-established network of transporters. Smaller items will ship via UPS. Larger equipment will be palletized and shipped either LTL or air-ride, depending on the specific equipment and/or delivery requirements.
Return and order cancellation policy
American Instrument Exchange will accept the return of any product that is not working as represented and could not be replaced or repaired to the customer's satisfaction during the warranty period. Customers who cancel orders after refurbishing has begun will be subject to a cancellation and restocking fee of between 20% and 40%.
Are discounts available for educational or non-profit institutions, or for bulk purchases?
Yes – call or email us today with a list of equipment you're looking for and we can potentially put together a quote that includes a discount.
How does your price matching policy work?
We strive to keep our pricing competitive and reasonable. If you find comparable items for sale at a lower price from other vendors please send us a link and or quote for the item and we'll do our best to match or beat the price.
Can I see the equipment in person before committing to a purchase?
Customers are welcome to make an appointment to view equipment in our warehouse. Given our workload we may not be able to test or clean the equipment prior to your arrival if you have not committed to an order.
1023 Western Avenue is a working warehouse, not a showroom, and customers should dress appropriately and wear closed toe shoes.
Can I ship products that I purchased elsewhere to American Instrument for repair?
Yes – please see our repair services page for more information.
