When dust levels stay high despite obvious controls, the culprit is often a hidden source: a leaking transfer point, a poorly timed clean-up, or draughts that defeat local capture. Fixed air monitors provide the objective data to track these down without halting production.

Map, baseline, and narrow the field

Start with a simple zone map: process lines, walkways, doors, and LEV hoods. Establish a baseline by running normal operations for a shift while logging PM trends. Tag notable events (bin emptying, doors opening, forklift passes) to make peaks searchable later.

Triangulate with placement and movement

Place one monitor upwind (reference) and others near suspected sources. If a peak appears on the downwind unit but not upwind, you have a local emitter. Move a monitor stepwise along the line to see where the peak rises sharply—often at chutes, transition points, or open conveyors. Smoke pencils or tracer fog help visualise leaks at extraction hoods and enclosures.

Link tasks to plumes

Ask operators to call out or tap a button when specific tasks start and end. If levels jump when a vacuum is unplugged or when bags are changed, adjust the sequence: pre-run LEV, damp down, or add temporary capture during the task. If night peaks appear, check automatic purges, HVAC cycles, or timer-based clean-ups.

Fix, verify, and lock in

Once a source is found, implement a small change and confirm the result in the data over several shifts. Seal gaps, lower drop heights, add side skirts, or increase hood face velocity. If ambient levels remain stubborn, deploy portable air scrubbing near the leak path; a compact unit like a MAXVAC Dustblocker can assist until permanent fixes are made.

Practical takeaways

• Use upwind/downwind monitors to prove a local source.
• Walk peaks back along the process to the first sharp rise.
• Tag tasks and events to link operations to plumes.
• Implement one change at a time and verify in trend data.
• Add temporary air scrubbing while permanent fixes are installed.

Hidden sources become visible when data, observation, and simple airflow tests are combined. With a structured approach, you can eliminate surprises and keep controls aligned with reality.