The Baker EdgeGARD EGB-4252 is a 4-foot benchtop horizontal laminar flow clean bench designed to provide a clean, HEPA-filtered working environment for nonhazardous samples, products, and processes requiring protection from airborne particulate contamination. Unlike full-height EdgeGARD console models, the EGB-4252 is specifically designed as a benchtop unit, allowing laboratories to install the clean bench on an appropriate existing laboratory bench or support structure.
With approximately 46 inches of interior working width, a large 48-inch-wide HEPA supply filter, and Baker's proven horizontal airflow design, the EGB-4252 provides substantial clean working space in a more compact installation format. It is an excellent option for laboratories that need a full-width 4-foot clean bench but do not require an integrated floor-standing base.
Available used and refurbished from American Instrument Exchange, this Baker EdgeGARD EGB-4252 is inspected and tested before shipment and includes a 90-day warranty.
Designed for installation on an existing laboratory bench or suitable support
ISO Class 5/Class 100 clean-air environment
HEPA-filtered horizontal laminar airflow
Approximately 46-inch-wide interior workspace
48"W × 30"H × 6"D HEPA supply filter
HEPA filtration with 99.99% efficiency at 0.3 µm
Approximately 90–100 fpm horizontal airflow
High-velocity return air slots help protect the clean workspace
Washable prefilter helps extend HEPA filter life
Stainless-steel work surface and side walls
Compact benchtop configuration conserves laboratory floor space
115 V electrical configuration
Refurbished and tested by American Instrument Exchange
90-day warranty included from American Instrument Exchange
Overview
The Baker EdgeGARD EGB-4252 combines the product-protection principles of Baker's horizontal-flow EdgeGARD clean benches with a compact benchtop cabinet design.
Room air enters the clean bench and passes through a washable prefilter that removes larger airborne particles before the air reaches the final HEPA filter. The HEPA-filtered air is then directed horizontally across the working area, surrounding nonhazardous samples and products with clean air before exiting through the front of the cabinet.
Baker's EdgeGARD design incorporates high-velocity return air slots along the leading edges of the work area. These slots help recover clean air and reduce the intrusion of contaminated room air into the working zone. Recirculating a portion of the filtered air can also reduce the percentage of comparatively dirty room air entering the system, helping extend HEPA filter life.
The EGB-4252 packages these airflow features into a benchtop format rather than the larger floor-standing console configuration of the EG4252. This makes it particularly useful for laboratories that already have suitable casework or bench space and want to add a dedicated clean-air workstation without installing another full-height piece of laboratory equipment.
Common Applications
The Baker EdgeGARD EGB-4252 is designed for nonhazardous procedures where protecting samples, products, components, or processes from airborne particulate contamination is the primary objective.
Typical applications include media preparation, plant tissue culture, nonhazardous sample preparation, appropriate pharmaceutical procedures, electronics assembly and inspection, optical component handling, medical device work, quality-control procedures, and other contamination-sensitive laboratory and production processes.
Its benchtop configuration can be especially useful in laboratories where floor space is limited or where existing laboratory casework provides an appropriate installation surface.
The approximately 4-foot working width provides enough room for instruments, containers, samples, and other materials without requiring the footprint of the larger 6-foot and 8-foot EdgeGARD models.
Ideal Laboratory Environments
The Baker EGB-4252 is well suited for biotechnology laboratories, pharmaceutical facilities, university research laboratories, hospital laboratories, medical device facilities, electronics operations, optical laboratories, food research laboratories, quality-control departments, and other facilities requiring a dedicated clean-air workspace.
The benchtop design is particularly attractive for laboratories with existing fixed casework. Instead of dedicating additional floor space to a console-style clean bench and base, the EGB-4252 can be positioned on a suitable laboratory bench or other properly rated support.
Before installation, laboratories should verify that the supporting bench is sufficiently large, stable, and structurally capable of supporting the clean bench.
Key Specifications
Specification
Baker EdgeGARD EGB-4252
Equipment Type
Benchtop horizontal laminar flow clean bench
Nominal Width
4 ft
Installation
Benchtop
Airflow
Horizontal laminar flow
Cleanliness Classification
ISO Class 5 / Class 100
Typical Airflow Velocity
Approx. 90–100 fpm
Filtration
HEPA
HEPA Filter Efficiency
99.99% at 0.3 µm
HEPA Filter Size
48"W × 30"H × 6"D
Interior Working Width
Approx. 46"
Work Area Construction
Stainless-steel work surface and side walls
Prefilter
Washable
Electrical Requirements
115 V AC, 60 Hz
Installation Base
Existing laboratory bench or suitable support
Manufacturer
Baker
Model
EdgeGARD EGB-4252
Refurbishment & Testing
Used laminar flow clean benches should be thoroughly evaluated before being returned to laboratory service. American Instrument Exchange technicians test the Baker EdgeGARD EGB-4252 to verify proper operation of the controls and blower motor and evaluate the HEPA filter for suitability in laboratory conditions.
AIE's clean bench testing incorporates the primary elements used during clean bench certification with the goal of preparing the unit to pass final testing following delivery and installation. The stainless-steel work area, lighting, controls, blower system, filtration components, electrical systems, and overall cabinet condition are also inspected during refurbishment.
The clean bench is thoroughly cleaned before shipment. Because cosmetic condition can vary among refurbished laboratory equipment, customers can request photographs of the specific EGB-4252 included with their order after testing and cleaning have been completed.
This refurbished Baker EdgeGARD EGB-4252 includes a 90-day warranty from American Instrument Exchange.
Certification Readiness & Service
Proper airflow velocity and HEPA filter integrity are essential to maintaining the clean working environment expected from the Baker EdgeGARD EGB-4252. After transportation and installation on its final laboratory bench, the clean bench should be evaluated according to applicable laboratory procedures before being placed into critical service.
American Instrument Exchange works with AIE Laboratory Services to support clean benches and other laboratory airflow equipment throughout Greater Boston and New England. Services can include airflow testing, HEPA filter evaluation and replacement, troubleshooting, preventative maintenance, and related laboratory equipment repair.
Final testing following relocation is particularly valuable because transportation, installation conditions, room airflow, filter condition, and the final placement of the clean bench can influence performance.
Shipping & Installation
The benchtop design of the Baker EGB-4252 eliminates the integrated lower console or floor stand found on full-height EdgeGARD configurations, but laboratories should still carefully plan its installation.
The clean bench must be placed on a sturdy, level laboratory bench, table, or other support capable of safely carrying its weight. The supporting surface should provide adequate depth and width for the cabinet and should allow the clean bench to remain stable during normal operation.
The final location should also be selected with room airflow in mind. Doors, HVAC diffusers, high-traffic areas, and other sources of disruptive air movement can affect clean bench performance.
Doorways, corridors, elevators, loading areas, and the route to the final laboratory should be evaluated before delivery. American Instrument Exchange can assist with freight coordination and provide additional information about the individual unit to help customers prepare for installation.
Related Equipment
Laboratories considering the Baker EdgeGARD EGB-4252 can explore additional clean benches and laminar flow hoods available from American Instrument Exchange.
For laboratories that prefer a full-height floor-standing configuration, the Baker EG4252 provides a similar 4-foot horizontal-flow workspace in a console-style cabinet. The extra-tall Baker EG4320 provides additional vertical working clearance, while larger EG6252 and EG6320 models expand the clean workspace to approximately six feet.
American Instrument Exchange also carries compact clean benches and PCR workstations from other manufacturers for laboratories where available bench and floor space are particularly limited.
For applications involving infectious agents, biological hazards, or other materials requiring personnel and environmental containment, AIE carries refurbished biosafety cabinets from Baker, Thermo Scientific, Labconco, Nuaire, and other major manufacturers.
The Baker EdgeGARD EGB-4252 is a horizontal laminar flow clean bench, not a biosafety cabinet. Its primary purpose is to protect nonhazardous samples, products, and processes from airborne particulate contamination.
HEPA-filtered air travels horizontally across the clean workspace and ultimately toward the operator. This arrangement provides product protection but does not provide the personnel and environmental containment associated with a Class II biosafety cabinet.
The EGB-4252 therefore should not be used for infectious agents, biohazardous samples, toxins, radionuclides, hazardous chemicals, or other substances requiring operator or environmental protection.
Laboratories working with biological hazards should instead select an appropriate Class II biosafety cabinet. For nonhazardous procedures where product cleanliness and particulate control are the primary objectives, a clean bench or laminar flow hood such as the Baker EGB-4252 may provide an appropriate working environment.
Yes. The EGB-4252 belongs to Baker's benchtop EdgeGARD series and is designed to be installed on a suitable laboratory bench or other appropriately rated support rather than incorporating the full-height console of the EG4252.
What is the difference between the Baker EGB-4252 and EG4252?
Both are 4-foot horizontal-flow EdgeGARD clean benches designed for product protection. The primary difference is cabinet configuration. The EGB-4252 is a benchtop model designed for installation on existing laboratory furniture or a suitable support, while the EG4252 is a full-height console-style clean bench.
How wide is the Baker EGB-4252 work area?
The EGB-4252 provides approximately 46 inches of interior working width, giving users nearly four feet of clean workspace while retaining a benchtop installation format.
What type of HEPA filter does the EGB-4252 use?
Baker specifies a 48-inch-wide by 30-inch-high by 6-inch-deep HEPA supply filter. The HEPA filtration system provides 99.99% efficiency for particles measuring 0.3 µm.
What airflow does the Baker EGB-4252 use?
The EGB-4252 uses horizontal laminar airflow. HEPA-filtered air moves from the rear of the cabinet across the working area toward the operator. Baker's historical EdgeGARD specifications describe adjustable airflow in the approximately 90–100 fpm range.
Can the Baker EGB-4252 be placed on any laboratory table?
The supporting bench or table should be level, stable, appropriately sized, and structurally capable of safely supporting the clean bench. The final installation should also provide appropriate clearance and should avoid locations where disruptive room airflow could interfere with clean bench performance.
Does a benchtop clean bench save laboratory floor space?
Potentially, yes. Because the EGB-4252 can use appropriate existing laboratory casework or bench space rather than requiring its own full-height floor-standing console, it can be a practical solution for laboratories where floor space is limited.
Is the Baker EGB-4252 a biosafety cabinet?
No. The EGB-4252 is a horizontal laminar flow clean bench designed to protect nonhazardous products and samples. It does not provide the personnel and environmental containment of a Class II biosafety cabinet.
Can the EGB-4252 be used with biohazardous materials?
No. Horizontal HEPA-filtered air ultimately travels toward the operator, so the EGB-4252 should not be used with infectious, biohazardous, toxic, or otherwise hazardous materials requiring containment.
Does American Instrument Exchange test the Baker EGB-4252 before shipment?
Yes. AIE technicians test the clean bench's controls and blower operation and evaluate the HEPA filtration system for suitability in laboratory conditions. The unit is also inspected and thoroughly cleaned before shipment.
Does the Baker EdgeGARD EGB-4252 include a warranty?
Yes. This refurbished Baker EdgeGARD EGB-4252 includes a 90-day warranty from American Instrument Exchange.
CLICK HERE to see the Baker Edgegard EGB-4252 on our 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.
