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Microbiological Environmental Monitoring Products
Settle Plate
A ready-to-use 90 mm agar plate for passive sedimentation monitoring or compatible active microbial air sampling in cleanrooms.
- 90 mm Air-Monitoring Format
- High Agar Fill Volume
- Sterile Triple-Wrap Option
- Passive or Active Sampling
Product Introduction
The Settle Plate uses a clear 90 mm polystyrene dish filled with a smooth high-volume layer of growth medium. When the lid is removed at a monitoring location, viable-carrying particles sediment onto the exposed agar for later incubation and colony counting. The increased medium depth limits drying during extended exposure or high-volume active sampling. Critical-area versions are available gamma irradiated and triple wrapped, with lockable lid formats and neutralizers selected to reduce inhibition from residual disinfectants.
Key Features
A high agar fill maintains surface condition during exposure and extended incubation.
Triple wrapping and final-package irradiation support transfer into isolators and critical cleanrooms.
TSA, fungal media and disinfectant-neutralizing formulations cover different monitoring objectives.
Customer Product Concerns
A settle plate must remain sterile before exposure, resist drying during monitoring and recover organisms despite residual disinfectant carryover.
Thin agar dries during long exposure and reduces organism recovery.An increased fill volume provides greater moisture reserve for passive or high-volume active sampling.
Packaging transfer introduces contamination into a critical zone.Nested transparent sterile bags support staged removal through controlled-area boundaries.
Disinfectant droplets carried onto the plate suppress microbial growth.Optional lecithin, polysorbate, histidine and thiosulfate neutralizers reduce common sanitizer residue effects.
A loose lid separates during transport to incubation.A lockable lid option secures the plate while providing defined closed or vented positions.
Typical Applications
Passive cleanroom air monitoringActive viable-air samplingIsolator and RABS monitoringPersonnel fingerprint sampling
Technical Parameters
Typical construction values for a prepared cleanroom settle plate are listed below.
| Core Material | Medical-grade polystyrene dish with Tryptic Soy Agar, Sabouraud Dextrose Agar or selected non-animal medium |
|---|---|
| Panel Thickness | 14-22 mm closed plate height |
| Effective Width | 90 mm nominal plate diameter |
| Maximum Length | Up to 95 mm overall outside diameter |
| Steel Facing Thickness | 0.8-1.2 mm equivalent polystyrene dish wall |
| Core Density | 1040-1060 kg/m³ for polystyrene dish components |
| Thermal Conductivity | 0.10-0.14 W/(m·K) for polystyrene dish components |
| Surface Finish | Crystal-clear plate with smooth pale-straw agar and optional blue identification rim |
| Joint Type | Slip-fit or two-position lockable lid with stack ring and optional individual data-matrix location |
| Customization | Available based on the intended application and operating environment. |
Available Options
TSA or SDA formulationDisinfectant neutralizersGamma-irradiated triple wrappingLockable or standard lid
Planning a Settle Plate specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
