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Labconco XPert 3950301 3' Filtered Balance System
The Labconco XPert 3950301 3' Filtered Balance System is a compact, self-contained laboratory enclosure designed to protect personnel during weighing and handling of powders, particulates, and other potentially hazardous dry materials. Available used and refurbished from American Instrument Exchange, this specialized balance enclosure combines controlled inward airflow, built-in HEPA filtration, and an integrated blower in a compact 3-foot-wide workstation suitable for analytical and microbalance applications.
Unlike a conventional chemical fume hood, the XPert 3950301 is designed specifically around particulate containment and precision weighing. Airborne powders generated during weighing and transfer procedures are drawn away from the operator and through a 99.99% efficient exhaust HEPA filter. Filtered air is then returned to the laboratory, allowing the system to operate without external exhaust ductwork for appropriate particulate applications.
With exterior dimensions of approximately 36" W × 29" D × 37.1" H and an interior measuring approximately 33.6" W × 23.4" D × 22.7" H, the XPert provides enough depth for many analytical and microbalances while maintaining a relatively small laboratory footprint. Catalog 3950301 also incorporates a Guardian analog airflow monitor for continuous indication of airflow conditions.
Key Features
Used and refurbished Labconco XPert Filtered Balance System
Catalog number 3950301
Compact 3-foot-wide powder weighing enclosure
Designed for personnel protection during weighing and particulate-handling procedures
Built-in variable-speed blower
99.99% efficient exhaust HEPA filtration
HEPA-filtered air returned to the laboratory for appropriate applications
No external ductwork required for standard recirculating operation
Guardian analog airflow monitor
Deep 23.4-inch interior accommodates many analytical and microbalances
Clean-Sweep ergonomic air foil and zone-perforated rear baffle
True bag-in/bag-out HEPA filter disposal system
Negative-pressure enclosure design
Angled, hinged tempered safety-glass sash
Two utility ports for electrical cords and tubing
100–115 V, 60 Hz electrical requirements
90-day warranty included from American Instrument Exchange
Designed for Powder Weighing and Particulate Containment
Weighing fine powders presents a different containment challenge from handling volatile chemicals. Opening containers, transferring powders, using spatulas, and placing material onto weighing vessels can release small particles into the surrounding air and potentially expose the operator.
The Labconco XPert 3950301 is specifically designed to contain these airborne particulates during weighing procedures. Controlled inward airflow helps prevent powders generated inside the enclosure from escaping through the front opening, while the exhaust HEPA filter captures airborne particles before filtered air is returned to the laboratory.
This design makes the XPert particularly useful for pharmaceutical formulation, dry chemical weighing, analytical sample preparation, environmental testing, and other laboratory procedures where powder containment and accurate weighing are both important.
Built-In Blower and HEPA Filtration
One of the major advantages of the XPert 3950301 is its self-contained airflow system. A variable-speed blower and exhaust HEPA filter are integrated into the upper plenum, eliminating the need for a separate filtered exhauster in the standard configuration.
The HEPA filter is 99.99% efficient for particles 0.3 micron in size. Because filtered exhaust air can be returned directly to the laboratory for appropriate applications, no connection to an external building exhaust system is required.
The blower incorporates a dynamically balanced, vibration-isolated motorized impeller. Minimizing vibration is particularly important in a balance enclosure because sensitive analytical and microbalances can be affected by movement transmitted through the surrounding workstation.
This integrated design can substantially simplify installation compared with a conventional ducted enclosure while allowing the XPert to be relocated more easily if laboratory requirements change.
Guardian Airflow Monitor
Catalog number 3950301 is equipped with Labconco's Guardian analog airflow monitor. The monitor provides a continuous indication of airflow conditions so operators can recognize changes that may affect enclosure performance.
This is particularly useful in a filtered weighing enclosure because containment depends on maintaining appropriate inward airflow through the front opening.
The system also incorporates a front-mounted pressure gauge used to monitor HEPA filter loading. Increasing resistance across the filter can indicate when filter service or replacement should be evaluated.
Designed for Analytical and Microbalances
The XPert's interior measures approximately 33.6" W × 23.4" D × 22.7" H, providing enough depth to accommodate many analytical and microbalances along with weighing vessels, sample containers, spatulas, and other accessories required during powder-handling procedures.
Labconco's airflow design is specifically intended to combine containment with the needs of precision weighing. The Clean-Sweep air foil directs air across the work surface, while a zone-perforated rear baffle promotes controlled horizontal airflow through the enclosure.
Additional airflow-management features include side-entry air foils, an upper dilution air supply, upper containment sash foil, and upper diffuser screen.
For the best weighing performance, the XPert should be installed on a rigid, level work surface with minimal vibration, and the balance should be appropriately selected for operation within a ventilated enclosure.
Sash and Work Area Access
The XPert 3950301 incorporates a 1/4-inch-thick tempered safety-glass front sash and glass side panels, providing excellent visibility into the weighing area.
The sash is positioned at an ergonomic 10-degree angle and provides an approximately 9.4-inch working opening during normal operation. This relatively small opening helps maintain the inward airflow required for containment while still providing convenient access to samples and weighing equipment.
For loading a balance or larger equipment, the sash can pivot upward and lock in position to provide substantially greater access to the interior. A wiping seal helps contain contaminants around the sash assembly.
Two utility ports provide convenient pathways for balance power cords and other required connections without unnecessarily routing cables through the primary work opening.
Common Applications
The Labconco XPert 3950301 is particularly well suited for pharmaceutical powder weighing, formulation research, analytical sample preparation, dry chemical weighing, powdered reagent preparation, environmental sample processing, mold sample handling, asbestos-related laboratory procedures, and other applications involving fine particulates.
It can also serve as a dedicated contained weighing station for laboratories that routinely work with powders and want to reduce both operator exposure and contamination of surrounding laboratory surfaces.
Suitability for a specific compound should always be determined through an appropriate laboratory risk assessment based on the material, quantity, procedure, and potential exposure hazard.
Ideal Laboratory Environments
The XPert 3950301 is well suited for pharmaceutical research and development laboratories, formulation laboratories, biotechnology facilities, analytical chemistry laboratories, environmental testing laboratories, industrial quality control laboratories, university research facilities, and other laboratories that need dedicated particulate containment.
Its compact 3-foot width makes it especially useful where laboratory bench space is limited or where several dedicated weighing stations are preferred over one larger centralized enclosure.
Key Specifications
Specification
Details
Manufacturer
Labconco
Product Line
XPert Filtered Balance System
Model / Catalog Number
3950301
AIE Product Code
2864I HOOD
Product Type
Filtered Balance Enclosure
Nominal Width
3 feet
Exterior Dimensions
36" W × 29" D × 37.1" H
Interior Dimensions
33.6" W × 23.4" D × 22.7" H
Interior Depth
23.4"
Sash Opening
Approx. 9.4" H × 33.6" W
Sash
Angled, hinged tempered safety glass
Exhaust Filtration
HEPA, 99.99% efficient at 0.3 micron
Blower
Built-in variable-speed blower
Airflow Monitor
Guardian analog
Filter Pressure Monitor
Minihelic pressure gauge
Utility Access
Two utility ports
Lighting
Pre-wired fluorescent
Electrical
100–115 V, 60 Hz
Weight
Approx. 230 lb
External Ductwork
Not required for standard recirculating operation
Work Surface
Required; verify inclusion with AIE
Supporting Base
Required; verify inclusion with AIE
Condition
Used and refurbished
Warranty
90 days
No External Ductwork Required
For appropriate particulate applications, one of the most significant advantages of the XPert 3950301 is its relatively simple installation.
The enclosure's blower and HEPA filter are built into the upper plenum. Instead of sending exhaust through facility ductwork to an external blower, filtered air is discharged back into the laboratory.
This can make the XPert especially useful when adding a powder weighing station to an existing laboratory where installing new exhaust ductwork would be difficult or expensive. It also provides greater flexibility if the laboratory is reorganized in the future.
The work surface and supporting base are separate components in Labconco's standard configuration, so buyers should confirm exactly what is included with this individual American Instrument Exchange unit before purchase.
Choosing an XPert Filtered Balance System vs. a Chemical Fume Hood
The XPert 3950301 and a conventional chemical fume hood are designed to address different laboratory hazards.
The XPert's HEPA filtration system is intended primarily for powders and airborne particulates. HEPA filters capture particles but do not remove most volatile chemical vapors or gases.
A conventional ducted chemical fume hood is generally the better choice when the primary hazard consists of solvent vapors, corrosive fumes, toxic gases, or other volatile chemicals that need to be exhausted from the building.
For laboratories weighing fine powders, dry chemicals, pharmaceutical ingredients, and other particulate materials, a purpose-designed filtered balance enclosure can provide a more appropriate combination of containment, workspace organization, and balance compatibility.
Refurbishment and Testing
This Labconco XPert 3950301 is inspected and refurbished by American Instrument Exchange prior to shipment. Our technicians inspect the enclosure, sash, blower, lighting, airflow components, airflow monitor, pressure gauge, and other operating features as applicable to the individual unit.
Because filtration performance is central to the intended use of the XPert, buyers should confirm the condition and configuration of the HEPA filter supplied with the individual enclosure before purchase. Final airflow performance should also be verified according to the requirements of the laboratory and intended application.
Why Buy a Refurbished Filtered Balance Enclosure from American Instrument Exchange?
A refurbished filtered balance enclosure can provide pharmaceutical, analytical, and research laboratories with dedicated powder containment at substantially lower cost than purchasing a comparable new workstation.
American Instrument Exchange also supplies analytical and precision balances, allowing laboratories to source both the weighing instrument and the containment enclosure required to build a complete powder weighing workstation.
In addition to balance enclosures, AIE offers chemical fume hoods, biosafety cabinets, clean benches, laboratory ventilation enclosures, and other containment equipment for a wide range of laboratory workflows.
This Labconco XPert 3950301 includes a 90-day warranty from American Instrument Exchange.
Frequently Asked Questions
What is the Labconco XPert 3950301 designed for?
The XPert 3950301 is designed primarily for contained weighing and handling of powders and particulates. Typical applications include pharmaceutical powder weighing, dry chemical preparation, analytical sample preparation, mold work, and other procedures where airborne particulates may present an exposure hazard.
Does the XPert 3950301 have a built-in blower?
Yes. A variable-speed blower is integrated into the enclosure's upper plenum along with the exhaust HEPA filter, eliminating the need for a separate filtered exhauster during standard recirculating operation.
Does the Labconco 3950301 require external ductwork?
No external ductwork is required for appropriate standard particulate applications. HEPA-filtered exhaust air is returned to the laboratory.
Can an analytical balance be used inside the XPert 3950301?
Yes. Analytical and microbalance applications are a primary purpose of the XPert Filtered Balance System. The 23.4-inch-deep interior accommodates many laboratory balances while leaving additional room for samples and weighing accessories.
What type of airflow monitor does catalog 3950301 have?
The 3950301 configuration is equipped with Labconco's Guardian analog airflow monitor. The closely related 3950302 configuration uses the Guardian 1000 Digital airflow monitor.
Is the XPert suitable for chemical vapors?
The standard HEPA filtration system is intended for particles rather than most chemical vapors or gases. Procedures involving significant quantities of volatile solvents or hazardous vapors should be evaluated for use with an appropriate chemical fume hood or another suitable containment system.
Does this enclosure provide product protection?
The XPert is designed primarily to protect personnel during particulate-handling procedures. It should not be treated as a clean bench or Class II biosafety cabinet when protection of the sample from ambient laboratory contamination is required.
Are the work surface and base included?
Labconco specifies a work surface and supporting base as required accessories rather than standard components of the 3950301 enclosure. Buyers should confirm the exact configuration included with this individual American Instrument Exchange unit before purchase.
Click Hereto see the Labconco balance enclosure on the American Instrument Exchange YouTube channel.
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.
