Compact Two-Stage Impactor Dust Sensor for Fine Particle Measurement

The impactor is divided into multiple stages (first impactor, second impactor) with each stage having specific slots and protrusions that create separate trapping regions. This segmentation allows different particle sizes to be filtered at different stages, achieving fine dust measurement accuracy while keeping each individual component simple and compact.

The impactor components are designed with nested structures where the first impactor contains trapping regions within its body, and the second impactor similarly contains trapping regions. This nesting approach maximizes filtering functionality within a compact footprint, reducing overall device size while maintaining effective particle separation.

The impactor functionality is segmented into two compact units (first and second impactors) that can be arranged in series. Each unit has optimized dimensions with slots and protrusions that create efficient trapping regions, achieving effective particle filtering without requiring a large single-stage impactor structure.

The impactor design utilizes three-dimensional spatial arrangement with protrusions extending in different directions (first protrusion, second protrusion, third protrusion) to create trapping regions. This dimensional approach allows efficient particle filtering within a compact volume by utilizing vertical and radial space effectively.

The impactor is designed as separable components (first impactor, second impactor, upper case, lower case) that can be manufactured independently and then assembled. This segmentation allows each component to be produced using standard manufacturing processes without requiring complex integrated tooling, improving ease of manufacture while maintaining measurement precision.

The impactor components are designed with universal features such as standardized slots, protrusions, and sealing surfaces that can be replicated across multiple units. This multi-functionality approach allows the same basic structure to serve both filtering and sealing functions, simplifying the manufacturing process while achieving the required measurement precision.

The impactor is designed as modular components (first impactor, second impactor, upper case, lower case) that can be easily separated from each other. This segmentation allows users to disassemble the impactor into individual pieces for thorough cleaning of trapping regions and slots, significantly improving ease of operation for maintenance while maintaining the filtering precision required for fine dust measurement.

The trapping regions and slots are designed as accessible features that can be easily reached and cleaned. The protrusions and slots are positioned to allow removal of accumulated particles without requiring complex disassembly, enabling simple maintenance operations while preserving the precise particle filtering capability.