MicroWell™ Biofilm Plate Assay
The Calgary Biofilm Device Alternative Built for Real-World Surfaces
The MicroWell™ Biofilm Plate Assay follows the same foundational methodology as the Calgary Biofilm Device: batch biofilm growth on a suspended coupon, antimicrobial challenge, sonication-based recovery, and viable cell enumeration, adapted for user-selected surface materials. Researchers familiar with the E2799 workflow will recognize the protocol immediately, with the critical difference that coupons can be stainless steel, titanium, PTFE, glass, or any custom material your research demands, rather than polystyrene pegs.
The anodized aluminum coupon-holder plate sits inside a standard 48-well microtiter plate, suspending the coupons into the wells. The aluminum plate is fully autoclavable and reusable across experiments. The 48-well plate and lid are standard single-use labware you already stock. No proprietary consumables to reorder.
MicroWell™ vs. Calgary Biofilm Device (MBEC)
| Calgary Biofilm Device (MBEC) | MicroWell™ MBPA 48 | |
|---|---|---|
| Biofilm Methodology | ASTM E2799 | E2799-based workflow adapted for coupon materials |
| Coupon Material | Polystyrene pegs only | Stainless steel, titanium, PTFE, glass, custom |
| Well Format | 96-well | 48-well |
| Coupon Holder | Disposable peg lid | Reusable anodized aluminum plate |
| Autoclavable | No | Yes |
| Proprietary Consumables | Yes, MBEC peg lids required | No, standard 48-well plates |
| Microcalorimetry Compatible | No | Yes (MBPA 48-50 variant) |
| Custom Material Options | No | Yes |

MicroWell™ Biofilm Plate Assay on Alignment Plate
The aluminum alignment plate sets every coupon to a precise, consistent depth across all 48 wells before your experiment begins. Consistent immersion depth means reproducible biofilm formation; critical for any quantitative assay. Both the coupon holder and alignment plate are fully autoclavable, so your entire setup is sterile before the first inoculation.
Applications
The MicroWell™ Biofilm Plate Assay is purpose-built for research where the substrate material actually matters. Common applications include:
Antimicrobial Efficacy Testing: Evaluate how well antimicrobial agents, coatings, or treatments perform against biofilms grown on the exact surface material relevant to your research, not just polystyrene.
Medical Device and Implant Research: Grow biofilms directly on titanium, stainless steel, PEEK, or other implant-grade materials to assess infection risk and surface treatment strategies under realistic conditions.
Industrial and Environmental Surface Studies: Investigate biofilm formation on materials used in food processing, water treatment, and industrial systems, where surface chemistry has a direct impact on biofilm behavior.
Custom and Novel Material Screening: Test proprietary coatings, new alloys, or experimental substrates using an established, reproducible biofilm challenge methodology. Results follow the same foundational workflow recognized throughout the biofilm research community, making them meaningful, comparable, and publishable.
Microcalorimetry Integration: Pair the MBPA 48-50 variant with isothermal microcalorimetry instruments to capture real-time metabolic activity data from surface-associated biofilms.



MicroWell™ Biofilm Plate Assay on 48-Well Microtiter Plate
The MicroWell™ coupon holder sits inside a standard 48-well microtiter plate, with each coupon positioned at a precise, consistent depth across all 48 wells.
Frequently Asked Questions
Is the MicroWell™ compatible with the Calgary Biofilm Device workflow?
Yes. The MicroWell™ follows the same foundational methodology as the Calgary Biofilm Device: batch biofilm growth on a suspended coupon, antimicrobial challenge, sonication-based recovery, and viable cell enumeration. Researchers familiar with that workflow will recognize the protocol immediately. The key difference is that the MicroWell™ extends it to any coupon material, not just polystyrene.
What coupon materials are supported?
The MBPA 48 supports any machinable coupon material, including stainless steel, titanium, PTFE, glass, aluminum, and custom materials available upon request. If your research requires a specific substrate, contact us to discuss options.
Why 48-well instead of 96-well?
The larger well diameter of a 48-well plate is what makes rigid coupon materials possible. At 96-well scale there is no room for a coupon of any meaningful size or thickness. The 48-well format is a deliberate design choice that enables surface-specific biofilm research that polystyrene pegs cannot support.
Can the system be sterilized between experiments?
Yes. Both the coupon holder plate and the alignment plate are fully autoclavable. The only single-use component is the standard 48-well microtiter plate and lid, which is common off-the-shelf labware you likely already stock.
Is the MicroWell™ compatible with microcalorimetry instruments?
Yes, through the MBPA 48-50 variant, which uses shortened 0.50 inch coupons designed to fit isothermal microcalorimetry vials such as the Symcel calVial. This configuration enables real-time metabolic activity measurements from surface-associated biofilms alongside standard viable cell enumeration.
How does coupon height consistency affect my results?
Consistent coupon immersion depth across all 48 wells is critical for reproducible biofilm formation. The included aluminum alignment plate sets every coupon to a precise, uniform depth before your experiment begins, ensuring that biofilm growth conditions are equivalent across the entire plate and that your results are meaningful and comparable between runs.
MBPA 48-50
The MBPA 48-50 is a shortened-coupon variant of the MicroWell™ system, designed for microcalorimetry instruments and other small-format analytical workflows that require a reduced coupon length of 0.50 inches. Both configurations are fully compatible with standard off-the-shelf 48-well microtiter plates.
| MBPA 48 (Standard) | MBPA 48-50 (Shortened) | |
|---|---|---|
| Coupon Length | 0.80 in | 0.50 in |
| Compatible Coupons | MBPA 8025 (0.80 in × 0.25 in) | MBPA 5025 (0.50 in × 0.25 in) |
| Standoff and Screw Length | Standard | Shortened to maintain alignment and immersion depth |
| Microcalorimetry Compatible | No | Yes |

MicroWell™ Biofilm Plate Assay on Alignment Plate, Shortened

MBPA 5025, Shortened Coupons
MBPA 5025 coupons are available in a range of materials including 316 stainless steel, PTFE, and polycarbonate. Their shortened geometry is sized to fit the titanium and glass calVial™ carriers used by the Symcel CalScreener™ system, enabling direct transfer from MicroWell™ biofilm growth into microcalorimetric analysis without additional sample handling.
Additional materials are available upon request. BioSurface Technologies is glad to work with customers to develop custom coupon materials for specific research or application needs.

