Baker SterilGARD e3 SG404 biosafety cabinet

Brand : Baker

Product Code : SKU 0877J BIO CAB

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Baker SterilGARD III SG404 Class II Type A2 Biosafety Cabinet

Refurbished Baker SterilGARD III SG404 Biosafety Cabinet for Sale

The Baker SterilGARD III SG404 is a 4-foot Class II Type A2 biosafety cabinet engineered to provide exceptional protection for laboratory personnel, research materials, and the surrounding environment during biological research and pharmaceutical applications. Designed and manufactured by Baker, a company recognized worldwide for contamination control technology, the SG404 combines proven airflow performance with ergonomic design, energy-efficient operation, and dependable reliability for laboratories handling biological agents and sterile materials.

The SG404 is well suited for applications involving cell culture, microbiology, molecular biology, virology, pharmaceutical development, clinical diagnostics, and biotechnology research. Its balanced airflow system, HEPA filtration, and spacious work area allow researchers to safely perform procedures requiring both personnel protection and product protection while maintaining a clean ISO Class 5 work environment.

At American Instrument Exchange, every Baker SG404 biosafety cabinet is inspected and tested by our technicians before shipment. Unless otherwise specified, new HEPA filters are installed at our facility prior to delivery. Laboratories seeking additional containment equipment may also browse our selection of refurbished biosafety cabinets, CO₂ incubators, laboratory refrigerators, ultra-low freezers, and centrifuges to complete their laboratory workflow.

Key Features

Class II Type A2 biological safety cabinet
Approximately 4-foot nominal cabinet width
Vertical laminar airflow design
HEPA-filtered supply and exhaust air
Baker SterilGARD III airflow technology
Energy-efficient ECM blower motor
ReadySAFE™ standby mode for reduced operating costs
Ergonomic 10° sloped front sash
Bright LED interior lighting
Digital airflow monitoring and cabinet controls
Ideal for microbiology, cell culture, pharmaceutical research, and clinical laboratories

Overview

The Baker SterilGARD III SG404 was developed to provide laboratories with dependable biological containment while reducing operating costs and improving user comfort. Unlike older biosafety cabinet designs that relied on conventional blower motors and less efficient airflow systems, the SG404 incorporates Baker's modern airflow engineering with electronically commutated (ECM) motor technology to provide stable airflow while consuming significantly less energy than previous generations of cabinets.

As a Class II Type A2 biosafety cabinet, the SG404 protects personnel through inward airflow at the front opening while HEPA-filtered vertical laminar airflow protects research materials from contamination. Exhaust air is HEPA filtered before leaving the cabinet, helping protect the laboratory environment while maintaining compliance with current laboratory biosafety practices.

For laboratories performing routine biological research throughout the day, the cabinet's ReadySAFE standby mode allows airflow to be reduced during periods of inactivity while maintaining cabinet cleanliness and lowering electrical consumption. Combined with the quiet blower system and ergonomic front sash, the SG404 offers an excellent balance of operator comfort, sample protection, and long-term operating efficiency.

Why Choose the Baker SG404?

Many biosafety cabinets provide basic personnel and product protection. The Baker SG404 was designed to go beyond minimum performance requirements by improving the day-to-day experience of laboratory personnel while reducing lifetime operating costs.

One of the SG404's greatest advantages is its energy-efficient ECM blower motor, which continuously adjusts to maintain stable airflow as filters gradually load over time. This helps maintain consistent cabinet performance while using considerably less electricity than traditional PSC blower motors found in many older biological safety cabinets.

The cabinet's 10-degree sloped front sash provides a more comfortable working position during extended procedures, reducing operator fatigue for researchers performing repetitive tissue culture, microbiological testing, or pharmaceutical sample preparation.

The ReadySAFE standby mode further distinguishes the SG404 by allowing laboratories to reduce airflow and energy consumption during inactive periods while maintaining a clean work environment, making it an attractive option for laboratories seeking to reduce operating expenses without compromising biosafety.

These features make the Baker SG404 an excellent choice for organizations seeking a refurbished biosafety cabinet that combines proven containment performance with modern energy efficiency and ergonomic design.

Baker SterilGARD III SG404 vs. Older Baker Biosafety Cabinets

The Baker SG404 represents a significant advancement over earlier generations of Baker SterilGARD biosafety cabinets. While previous models earned a reputation for reliable containment and durability, the SG404 incorporates several modern improvements that enhance performance, reduce operating costs, and improve day-to-day usability.

One of the most important upgrades is the use of an electronically commutated (ECM) blower motor, which automatically adjusts to maintain proper airflow as the HEPA filters gradually load over time. Compared to conventional blower motors found in many older biosafety cabinets, ECM technology delivers more consistent airflow while using significantly less electricity.

The SG404 also features Baker's ReadySAFE™ standby mode, allowing laboratories to reduce airflow and energy consumption during periods when the cabinet is not actively in use while maintaining a clean work environment. Combined with the ergonomic 10-degree sloped front sash, LED lighting, and modern digital controls, the SG404 offers a noticeably improved user experience for laboratories operating biosafety cabinets throughout the workday.

For laboratories replacing an aging SterilGARD cabinet, the SG404 provides an excellent opportunity to upgrade to a more energy-efficient, ergonomically designed biological safety cabinet without sacrificing the airflow performance and contamination control for which Baker cabinets are well known.

Compatible Laboratory Equipment

The Baker SG404 is frequently installed as part of a complete laboratory workflow rather than as a standalone instrument. Cell culture and microbiology laboratories often pair a biosafety cabinet with additional equipment that supports sample preparation, incubation, storage, analysis, and quality control.

Common companion equipment includes CO₂ incubators for maintaining mammalian and stem cell cultures, refrigerated and benchtop centrifuges for sample processing, laboratory refrigerators and ultra-low temperature freezers for reagent and specimen storage, and laboratory microscopes for routine examination of cultured cells and biological samples. Many laboratories also utilize laboratory autoclaves to sterilize instruments, media, and laboratory waste generated during biological research.

American Instrument Exchange maintains a broad inventory of refurbished laboratory equipment, allowing research laboratories, pharmaceutical companies, hospitals, and biotechnology organizations to source multiple compatible instruments from a single supplier. Purchasing complementary equipment together can simplify laboratory planning, reduce procurement lead times, and help create a fully integrated laboratory workflow using professionally refurbished equipment.

Common Applications

The Baker SG404 is widely used throughout the life sciences because it provides dependable contamination control for procedures requiring simultaneous protection of personnel, research materials, and the laboratory environment.

Common applications include:

Mammalian cell culture
Stem cell research
Tissue culture
Microbiology
Virology
Molecular biology
PCR sample preparation
Pharmaceutical research
Vaccine development
Clinical diagnostic testing
Academic research laboratories
Quality control laboratories
Biotechnology product development

Ideal Laboratory Environments

The Baker SG404 is frequently selected by biotechnology companies, pharmaceutical manufacturers, university research laboratories, hospital pathology departments, public health laboratories, and clinical diagnostic facilities. Its combination of operator comfort, dependable airflow performance, and energy-efficient operation makes it particularly well suited for laboratories where biosafety cabinets remain in continuous daily use.

Because the SG404 utilizes a Class II Type A2 airflow design, it is appropriate for work involving Biosafety Level 1, 2, and many Biosafety Level 3 procedures when installed and operated according to institutional biosafety guidelines. Laboratories performing sterile cell culture, microbiological research, or pharmaceutical development benefit from the cabinet's ability to maintain a clean ISO Class 5 work area while protecting personnel from aerosol exposure.

Key Specifications

Specification	Details
Manufacturer	Baker
Model	SterilGARD III SG404
Cabinet Type	Class II Type A2 Biosafety Cabinet
Nominal Width	4 ft
Airflow	Vertical Laminar Flow
Supply Filtration	HEPA
Exhaust Filtration	HEPA
Blower Motor	Electronically Commutated (ECM)
Operating Mode	ReadySAFE Standby Capable
Front Sash	10° Ergonomic Sloped Design
Lighting	LED
Electrical	115V, 60 Hz (model dependent)

Specifications compiled from Baker manufacturer literature, distributor technical references, and American Instrument Exchange product information.

Refurbishment & Testing Process

Every Baker SG404 biosafety cabinet received by American Instrument Exchange undergoes a comprehensive inspection and refurbishment process before being offered for sale. Our technicians evaluate each cabinet's mechanical, electrical, and airflow systems to verify proper operation and identify any components requiring service or replacement.

Unless otherwise specified, new HEPA filters are installed at our facility prior to shipment. The blower system, control panel, lighting, sash operation, alarms, and cabinet functions are inspected and tested to verify proper performance. Each cabinet is cleaned inside and out, and worn cosmetic components are repaired or replaced whenever practical to improve appearance and functionality.

This refurbishment process helps ensure that every SG404 leaving our facility is prepared for installation and certification at the customer's laboratory.

Certification Readiness

Proper certification is essential whenever installing or relocating a biosafety cabinet. Following refurbishment, the Baker SG404 is prepared for field certification to verify airflow performance, HEPA filter integrity, cabinet pressurization, and overall compliance with current NSF/ANSI 49 certification requirements.

For laboratories located throughout New England, AIE Laboratory Services provides on-site biosafety cabinet certification, preventative maintenance, HEPA filter replacement, repairs, and relocation services. Our experienced field technicians help laboratories maintain regulatory compliance while maximizing equipment reliability throughout the life of the cabinet.

Shipping & Installation

The Baker SG404 is professionally prepared for shipment using commercial laboratory equipment packaging designed to help protect the cabinet during transportation. Because biosafety cabinets are precision airflow devices, proper handling during shipping and installation is critical to maintaining cabinet performance.

American Instrument Exchange can assist customers with freight coordination, delivery logistics, installation planning, and equipment placement. We also offer inside delivery, laboratory positioning, and regional installation assistance when requested. Following installation, the cabinet should be certified before being placed into service.

Compatible Laboratory Equipment

Common companion equipment includes CO₂ incubators for maintaining mammalian and stem cell cultures, refrigerated and benchtop centrifuges for sample processing, laboratory refrigerators and ultra-low temperature freezers for reagent and specimen storage, laboratory microscopes for routine examination of cultured cells and biological samples, and laboratory autoclaves for sterilizing laboratory instruments, media, and biological waste.

American Instrument Exchange maintains a broad inventory of professionally refurbished laboratory equipment, allowing research laboratories, pharmaceutical companies, hospitals, and biotechnology organizations to source multiple compatible instruments from a single supplier while reducing procurement lead times.

Frequently Asked Questions

Does the Baker SG404 include new HEPA filters?

Unless otherwise specified, American Instrument Exchange installs new HEPA filters in every refurbished Baker SG404 biosafety cabinet before shipment.

What type of work can be performed inside the SG404?

The SG404 is designed for applications requiring simultaneous personnel, product, and environmental protection, including cell culture, microbiology, molecular biology, pharmaceutical research, clinical diagnostics, and biotechnology workflows.

Is the Baker SG404 suitable for tissue culture?

Yes. The Class II Type A2 airflow design provides an ISO Class 5 work environment that is well suited for sterile tissue culture and other contamination-sensitive laboratory procedures.

Does the SG404 require certification after installation?

Yes. Like all biosafety cabinets, the SG404 should be certified after installation or relocation and at regular intervals thereafter to verify proper airflow performance and HEPA filter integrity.

Can American Instrument Exchange provide certification services?

Yes. Through AIE Laboratory Services, we provide biosafety cabinet certification, preventative maintenance, repairs, HEPA filter replacement, and laboratory equipment service throughout New England.

Is the Baker SG404 energy efficient?

Yes. Compared with many earlier-generation biosafety cabinets, the SG404 incorporates an electronically commutated (ECM) blower motor and standby operating mode that help reduce electrical consumption while maintaining stable airflow performance.

What laboratories commonly use the Baker SG404?

The SG404 is widely used by biotechnology companies, pharmaceutical manufacturers, academic research laboratories, hospitals, public health laboratories, clinical diagnostic facilities, and government research organizations performing biological research and sterile laboratory procedures.

Why purchase a refurbished Baker SG404 from American Instrument Exchange?

Each cabinet undergoes inspection, testing, cleaning, and refurbishment by experienced technicians before shipment. Combined with new HEPA filters (unless otherwise specified), responsive customer support, and optional certification services through AIE Laboratory Services, a refurbished Baker SG404 provides laboratories with a dependable and cost-effective alternative to purchasing new equipment.

Are the Baker Sterilgard SG404 units as durable as the older SG400 models?

Time will tell, although all indications are that these units will have some serious longevity. As of this writing we still see some Baker SG400 models in the field – every now and then our certifiers will come across a unit that is older than they are.

Will the Sterilgard 404s last this long? They are certainly quality built, as are all Baker products, with quality materials and a good design. We’re looking forward to working with these units for many years to come.

Why do you install new HEPA filters in the Baker SG404 before shipping to customers?

New filters for a Baker SterilGard SG404, plus the cost of installation, can total anywhere from $2,000 to $3,500 or more, depending on your location and what your certifier charges for installation. We install new HEPA filters in every biosafety cabinet and clean bench prior to shipment. If you’re purchasing a used biosafety cabinet without filters, there’s no way to know for sure that it works properly.

If you’re buying a used biosafety cabinet with old filters, you may not be able to determine the age of the filters or safe operating time remaining, plus there are concerns of contamination. Installing new filters is the best way for us to guarantee that each biosafety cabinet works to specification and completely decontaminated.

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.

Please contact our team at info@americaninstrument.com for more details.

FAQ

Does the equipment come with a warranty?

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.

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