Kawakami Oil Mist Detection Tube 602SP

Overview

The Kawakami Oil Mist Detection Tube 602SP is a precision-engineered, single-use colorimetric indicator tube designed for rapid, on-site quantification of hydrocarbon-based oil mist in breathing-grade compressed air systems. It operates on the principle of selective chemical reaction between airborne oil aerosols and a proprietary reagent layer immobilized within a calibrated glass tube. Upon controlled passage of a defined volume of compressed air—regulated via the Kawakami P-40R sampling manifold—the oil mist deposits onto the reagent, inducing a stoichiometric color transition from yellow to pale blue. The length of the stained zone is directly proportional to the oil mist concentration and is read against a printed scale calibrated in mg/m³. This method conforms to the fundamental analytical framework outlined in ISO 8573-2 (2019) for particulate and aerosol measurement in compressed air, and supports compliance verification per DIN 3188, CSA Z180.1, BS EN 12021, and CGA G-4.1 standards for respiratory air quality.

Key Features

• Quantitative visual readout with ±15% repeatability under controlled flow and temperature conditions
• Pre-calibrated linear scale optimized for the 0.3–5 mg/m³ range—covering critical thresholds for Class 2 (ISO 8573-1) and occupational exposure limits
• Integrated dual-end break design enabling rapid deployment without auxiliary tools
• Stable reagent formulation resistant to interference from ambient humidity (validated up to 80% RH at 25 °C), with documented non-reactivity to CO, CO₂, or water vapor at typical breathing-air concentrations
• Traceable lot-specific calibration certificates provided with each batch (per ISO/IEC 17025-accredited manufacturing protocol)
• Compatible exclusively with the Kawakami P-40R regulated sampling system to ensure consistent pressure reduction (0.098 MPa secondary pressure) and volumetric flow (3 L/min ±5%) during the 25-minute exposure period

Sample Compatibility & Compliance

The 602SP tube is validated for use with compressed air supplied from high-pressure cylinders (up to 30 MPa), membrane or oil-free piston compressors, and cascade filling systems common in fire service, industrial safety, and diving operations. It detects total hydrocarbon aerosol—including mineral oil, synthetic ester, and polyalphaolefin (PAO) mists—without requiring solvent extraction or gravimetric validation for field screening. Its performance meets the detection sensitivity requirements of ISO 8573-1:2010 Annex C for solid particle and liquid aerosol contaminants, and aligns with the maximum allowable oil content limits specified in DIN 3188 (≤5 mg/m³), CSA Z180.1 (≤0.5 mg/m³), and BS EN 12021:2014 (≤0.5 mg/m³). Note: While not intended for regulatory reporting without parallel laboratory confirmation, it satisfies GLP-aligned field verification protocols when used within its validated operating envelope.

Software & Data Management

As a passive, analog detection system, the 602SP requires no firmware, drivers, or digital interface. However, its integration into formal QA/QC workflows is supported through standardized documentation templates compliant with ISO 9001:2015 Clause 8.2.4 and FDA 21 CFR Part 11 Annex A (for electronic record linkage). Users are advised to log tube lot number, sampling date/time, operator ID, ambient temperature/humidity, regulator settings, observed stain length, and calculated concentration in a controlled hardcopy or validated LIMS entry form. Calibration traceability data—including NIST-traceable reference gas exposure reports—is archived by Meiko Rikka and available upon request for audit readiness.

Applications

• Routine verification of compressor output prior to cylinder filling in fire department SCBA programs
• Pre-shift checks of airline respirator supply lines in petrochemical and pharmaceutical cleanrooms
• Commissioning validation of coalescing filters and activated carbon traps in ISO Class 2 compressed air systems
• Root-cause analysis during oil carryover incidents in rotary screw compressors
• Field training demonstrations for occupational hygienists and safety officers on aerosol contamination mechanisms
• Compliance support for OSHA 1910.134, HSE INDG355, and EU Directive 2008/50/EC Annex III monitoring strategies

FAQ

What is the shelf life of an unopened 602SP tube?
Unopened tubes retain full accuracy for 24 months from manufacture when stored at 0–25 °C in original packaging, protected from light and moisture.
Can the 602SP detect synthetic lubricants such as PAO or PAG?
Yes—validation studies confirm quantitative response to PAO-6, PAO-8, and polyalkylene glycol (PAG) aerosols across the full 0.3–5 mg/m³ range, with <±10% deviation relative to gravimetric reference methods.
Why must the P-40R regulator be used instead of generic flow meters?
The P-40R ensures stable secondary pressure (0.098 MPa) and laminar flow (3 L/min) critical for reproducible aerosol deposition kinetics; deviations >±5% in flow rate introduce non-linear staining errors exceeding ±25%.
Does ambient humidity affect the reading?
No—reagent chemistry is formulated to suppress water-vapor-induced discoloration; however, condensation inside the tube (e.g., from saturated air at low temperatures) may obscure the stain front and invalidate results.
Is this tube suitable for continuous monitoring?
No—it is a discrete, single-exposure device. For real-time oil mist surveillance, refer to the Kawakami OMA-2000 optical scattering analyzer series.