Koki Chemical
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| Brand | Koki Chemical |
|---|---|
| Origin | Japan |
| Model | 102SA |
| Detection Principle | Colorimetric Reaction via Chromium Oxide Reduction |
| Measuring Range (Acetone) | 0.1–2.0% (100 mL sampling) / 1.0–5.0% (50 mL sampling, Scale I) |
| Measuring Range (THF) | 0.2–3.0% (100 mL, Scale II) / 0.1–2.0% (50 mL, Scale III) |
| Detection Time | 1.5 min per 100 mL |
| LOD | 200 ppm (acetone), 20 ppm (THF) |
| Color Change | Orange → Dark Brown |
| Operating Temperature | 0–40 °C (temperature correction required) |
| Temperature Correction Factor | ×0.2 per 10 °C deviation from 20 °C |
| Interferents | Alcohols, esters, ketones, aromatic hydrocarbons (>0.5% halogenated hydrocarbons cause positive bias) |
| Humidity Effect | None |
| Pressure Correction | Required — apply formula: corrected ppm = measured ppm × 1013 hPa ÷ actual barometric pressure (hPa) |
| Compliance | Designed for field use in accordance with JIS K 0804 and ISO 8518 (colorimetric gas detection tubes) |
| Brand | Koki Chemical |
|---|---|
| Origin | Japan |
| Model | AP-20 Gas Detection Tube |
| Tube Variety | 300+ gas-specific tubes |
| Operation | Manual air-sampling pump (included) |
| Portability | Handheld, field-deployable |
| Compliance | SEI-certified (USA), CE-marked (EU) |
| Regulatory Context | Designed for OSHA, NIOSH, and ISO 8573-1–compatible workplace air monitoring |