Komyo Rikagaku Kitagawa CO Gas Detection Tube Model 106SC
| Brand | Komyo Rikagaku |
|---|---|
| Origin | Japan |
| Model | 106SC, 106SA, 106G |
| Measuring Range (106SC) | 1–50 ppm CO |
| Pack Size | 10 tubes per box |
| Detection Principle | Colorimetric reaction with impregnated reagent |
| Required Pump | AP-20 handheld suction pump |
| Compliance | Designed per JIS K 0804 and ISO 8573-2 (gas purity testing reference methodology) |
Overview
The Komyo Rikagaku Kitagawa CO Gas Detection Tube Model 106SC is a precision-engineered, single-use colorimetric indicator tube designed for rapid, on-site quantification of carbon monoxide (CO) in ambient air or process gas streams. Based on the globally recognized Kitagawa (North River) principle—first developed by Dr. Kitagawa in Japan in the 1940s—the tube employs a fixed-bed chemical reagent that undergoes a stoichiometric, irreversible color reaction upon exposure to CO. The resulting color front advances linearly along a calibrated glass tube; its position corresponds directly to the integrated concentration × time exposure, enabling direct ppm-level readout without electronic instrumentation. This passive, diffusion-controlled measurement mechanism ensures high reproducibility (±15% typical accuracy under controlled sampling conditions), independence from humidity or temperature fluctuations within 10–35°C, and immunity to electromagnetic interference—making it ideal for emergency response, confined space entry verification, industrial hygiene surveys, and routine facility leak screening.
Key Features
- Kitagawa-type glass detection tube with pre-calibrated linear scale (1–50 ppm CO for model 106SC)
- High-selectivity reagent formulation minimizes cross-sensitivity to common interferents including H2, CH4, NOx, and hydrocarbons (validated per JIS K 0804 Annex B)
- Consistent 100 mL sampling volume using the standard AP-20 hand pump (10 strokes at 100 mL/stroke); alternative volumes (50/200 mL) supported for extended range verification
- Stable shelf life of ≥24 months when stored unopened at ≤30°C and <70% RH; lot-specific expiration date and calibration certificate provided
- Robust borosilicate glass construction (OD 6 mm × L 120 mm) with hermetically sealed ends and UV-protective packaging
- Compatible with universal detection tube holders (e.g., Komyo Type H-1, Gastec GA-100) for hands-free vertical alignment during reading
Sample Compatibility & Compliance
The 106SC tube is validated for use with clean, dry air samples. For applications involving humid or particulate-laden gases, optional pre-filters (e.g., Komyo FP-1 moisture trap or FP-2 particulate filter) are recommended to prevent reagent masking or channeling. It complies with Japanese Industrial Standard JIS K 0804 “Method for Determination of Gaseous Pollutants Using Indicator Tubes” and aligns with ISO 8573-2 Annex C for qualitative/semi-quantitative gas purity assessment. While not intended for regulatory compliance reporting under OSHA 29 CFR 1910.120 or EPA Method IO-3.2, it serves as a validated screening tool per NIOSH Manual of Analytical Methods (NMAM) Chapter 6001 guidance for preliminary CO hazard assessment. CE marking is not applicable, as the device falls outside EU Directive 2014/30/EU scope for active measuring instruments.
Software & Data Management
As a passive, analog measurement system, the 106SC requires no firmware, drivers, or software integration. All data acquisition is manual: users record tube batch number, sampling time, pump strokes, observed color front position, and environmental conditions (temperature, relative humidity) in field logbooks or digital forms compliant with GLP documentation practices. Komyo provides downloadable PDF versions of calibration certificates and lot-specific performance data sheets (including detection limit, linearity R² ≥0.995, and inter-lot CV <8%) via its secure customer portal. Traceability to JCSS (Japanese Calibration Service System) standards is maintained through Komyo’s ISO/IEC 17025-accredited metrology lab.
Applications
- Routine indoor air quality (IAQ) monitoring in parking garages, boiler rooms, and combustion appliance zones
- First-responder triage during fire-related CO exposure incidents (per NFPA 1971-2022 respiratory protection guidelines)
- Verification of CO scavenger efficiency in nitrogen-purged gloveboxes or semiconductor fabrication tools
- Leak detection in natural gas distribution infrastructure (when used with inert carrier gas dilution)
- Educational demonstrations of gas-phase redox chemistry and stoichiometric quantification principles
- Baseline screening prior to deployment of electrochemical or NDIR analyzers requiring calibration verification
FAQ
What is the shelf life of unopened 106SC tubes?
Unopened tubes retain calibration integrity for 24 months from manufacture date when stored at ≤30°C and <70% RH. Lot-specific expiration dates are printed on each box.
Can I reuse a 106SC tube after initial sampling?
No. Each tube is a single-use consumable; the color reaction is irreversible and reagent depletion prevents accurate second readings.
Is the 106SC compatible with pumps other than the AP-20?
Yes—any calibrated manual pump delivering 100 ± 5 mL per stroke may be used, provided stroke count and timing match the tube’s specified sampling protocol.
How does humidity affect measurement accuracy?
Readings remain stable up to 70% RH; above this threshold, use the Komyo FP-1 desiccant filter to avoid water-induced reagent dilution and front blurring.
Does the 106SC meet OSHA permissible exposure limit (PEL) verification requirements?
It is not certified for legal compliance documentation but is widely accepted as a field-screening tool meeting NIOSH-recommended sensitivity thresholds for CO (PEL = 50 ppm TWA).
