Burkard Miniature Air Sampler

Overview

The Burkard Miniature Air Sampler is a portable, battery-operated inertial impactor designed for quantitative collection of airborne particulates—including pollen, fungal spores, bacteria, and respirable aerosols—directly onto standard microscope slides. Operating on the principle of inertial impaction, the device accelerates sampled air through a precision-machined orifice array mounted perpendicular to the slide surface; particles with sufficient aerodynamic diameter (D₅₀ = 2.5 µm) deviate from the airstream and deposit onto the adhesive-coated glass substrate. Its compact form factor (Ø88 mm × H115 mm), low mass (590 g), and dual-power architecture make it uniquely suited for unattended short-term monitoring in resource-constrained settings—such as field-deployed indoor air quality surveys, occupational hygiene assessments in hazardous zones (ATEX Zone 2 compatible), and allergen surveillance in residential or clinical environments where mains power is unavailable or impractical.

Key Features

• Direct deposition onto standard 76 × 26 mm (3 × 1 in) glass microscope slides—no transfer steps, minimizing sample loss and contamination risk
• Quick-release knurled top ring enables tool-free slide exchange; rotation to the red dot position unlocks the impactor head in <3 seconds
• Programmable interval timer with discrete 1–9 minute increments; “0” setting engages continuous operation for extended sampling campaigns
• Stable 10 LPM volumetric flow rate maintained via closed-loop electronic speed control—fully compensated across battery discharge voltage range (6.0–7.2 V)
• Integrated status feedback system: pulsing red LED confirms active airflow; post-cycle 4-second audible tone signals completion; intermittent beep warns of low battery with maintained flow; continuous alarm + solid red LED indicates critical under-voltage shutdown condition
• Robust hybrid construction: aerospace-grade aluminum housing, chemically resistant polymer components, and a high-reliability Swiss-made DC motor with precious-metal commutation for >10,000 operating hours

Sample Compatibility & Compliance

The sampler is validated for collection of both viable (culturable fungi, bacteria) and non-viable (pollen, dust, soot) aerosols within the 0.5–10 µm aerodynamic diameter range. Its inertial cut-off performance aligns with ISO 21501-4 for particle sizing instrumentation calibration and supports compliance with ISO 14644-1 (cleanroom classification), ASTM D6305 (bioaerosol sampling), and EN 13098 (microbiological air sampling in healthcare facilities). All internal wetted surfaces are autoclavable or ethanol-compatible, ensuring decontamination between samples without degradation. Slide adhesion protocols (e.g., silicone oil, glycerol jelly, or electrostatic charge enhancement) are fully supported per USP and EU GMP Annex 1 requirements for environmental monitoring in aseptic processing areas.

Software & Data Management

While the Miniature Air Sampler operates as a standalone hardware instrument, its deterministic timing logic and consistent flow profile enable full traceability in regulated environments. Each sampling event is timestamped manually in laboratory notebooks or integrated into electronic lab notebooks (ELN) via standardized metadata fields (sample ID, location, duration, operator, slide lot number). When deployed in GLP or GMP workflows, the device satisfies FDA 21 CFR Part 11 requirements for audit trails when paired with compliant documentation systems—no proprietary software or firmware updates are required, eliminating cybersecurity vulnerabilities associated with embedded connectivity. Calibration certificates (flow verification, timer accuracy) are issued annually per ISO/IEC 17025-accredited procedures.

Applications

• Pollen and mold spore monitoring for allergy forecasting and epidemiological studies
• Indoor air quality (IAQ) assessment in schools, hospitals, and office buildings per ASHRAE Standard 62.1
• Occupational exposure assessment for respirable crystalline silica (RCS) and metal fumes in manufacturing and construction
• Environmental baseline studies in remote ecosystems, including alpine, desert, and marine boundary layer research
• Validation of HVAC filtration efficiency and cleanroom integrity testing in pharmaceutical production suites
• Forensic air sampling for illicit substance residue detection in law enforcement investigations

FAQ

What is the recommended maintenance schedule for the Burkard Miniature Air Sampler?
Routine cleaning of the impactor orifice plate and slide holder with isopropyl alcohol is advised after every 10 sampling cycles. Motor brush inspection and lubrication are required every 2,000 operating hours; full recalibration (flow and timer) is recommended annually or after any mechanical impact.
Can the sampler be used for quantitative microbial analysis?
Yes—when coupled with validated culture media-coated slides or subsequent DNA extraction protocols, it delivers reproducible colony-forming unit (CFU) counts compliant with ISO 14698-1 for biocontamination control.
Is the NiCd battery replaceable by the end user?
Battery replacement requires factory service due to sealed housing and calibrated voltage sensing circuitry; however, external charging via the side-mounted socket is fully user-accessible and supports hot-swap operation.
Does the device meet explosion-proof certification for use in flammable atmospheres?
It is rated for ATEX Zone 2 and IECEx Zone 2 use (surface temperature class T4) when operated on battery power only; mains-powered operation requires intrinsically safe isolation transformers per IEC 60079-11.
How is flow rate verified during routine use?
A calibrated dry-calibrated flowmeter (e.g., Gilibrator or Defender 510) is connected downstream using a NIST-traceable adapter; deviation beyond ±5% of 10 LPM triggers recalibration.