High-precision instruments for air quality monitoring, particle measurement, and environmental analysis – built for reliability, accuracy, and compliance.
The GK4.162 RASCAL (Respirable Air Sampling Cyclone/Aluminum) is a heavy-duty, high-flow sampler designed to tackle the toughest Crystalline Silica monitoring challenges. Operating between 8.5 and 9.0 LPM, it follows the ACGIH/ISO/CEN respirable curve (PM4) while collecting 4-5 times more sample mass than traditional cyclones. This capability is essential for meeting the ultra-low detection limits required by the new OSHA Silica Standard.
Ultimate Sensitivity: The high flow rate (up to 9 LPM) enables detection of trace silica levels even during short task-based monitoring (e.g., 15-minute tasks).
LOQ Compliance: Specifically engineered to overcome the "Limit of Quantitation" issues labs face with lower flow pumps.
Large Filter Surface: Utilizes a 47mm filter, preventing filter overloading and reducing backpressure issues common with heavy dust loading.
Cassette Compatibility: Compatible with standard commercially available cassettes (e.g., Slaton, SKC).
The RASCAL is a physical breakthrough in personal sampling, allowing high-volume pumps to be used for personal respirable dust monitoring. By increasing the flow to ~9 LPM, it allows industrial hygienists to quantify exposures well below the OSHA Action Level (25 µg/m³) with high statistical confidence. The cyclone geometry ensures that despite the high velocity, the particle cut remains strictly at 4.0 µm.
Short-Duration Task Monitoring: Measuring silica exposure during brief activities like concrete cutting, tuckpointing, or sandblasting.
Low-Concentration Environments: Verifying compliance in engineering control zones where dust levels are expected to be very low.
Fracking & Mining: High-volume sampling in extractive industries.
Legal Defensibility: Providing robust mass data to prove compliance with stringent PELs.
For silica compliance, the "Non-Detect" result is no longer acceptable if the detection limit is too high. The GK4.162 RASCAL ensures your samples are valid. It is the only choice for hygienists who need to prove compliance with the lowest Occupational Exposure Limits (OELs) in the shortest possible time.
