KOMYO RIKAGAKU Chloroprene Gas Detection Tube Model 132SC

Overview

The KOMYO RIKAGAKU Chloroprene Gas Detection Tube Model 132SC is a single-use, colorimetric dosimeter designed for rapid, on-site qualitative and semi-quantitative analysis of chloroprene (2-chloro-1,3-butadiene) vapor in ambient air. Developed and manufactured in Japan by KOMYO RIKAGAKU—established in 1947 and globally recognized as the world’s largest producer of gas detection tubes—the 132SC tube operates on the principle of selective chemical reaction between chloroprene and a pre-impregnated reagent bed inside a sealed glass tube. Upon aspiration through the AP-20 manual piston pump (not included), chloroprene molecules react with the reagent, producing a distinct color front that advances proportionally to concentration and sampling volume. The resulting stain length is read directly against the calibrated scale printed on the tube body, delivering an immediate concentration estimate in parts per million (ppm) within the validated range of 1–40 ppm. This method complies with fundamental principles outlined in JIS K 0321 (Japanese Industrial Standard for gas detection tubes) and aligns with ISO 8573-5 for purity classification of compressed gases via indicator tube methodology. It is not intended for continuous monitoring or regulatory compliance reporting but serves as a critical first-response tool during leak investigations, industrial hygiene screening, or emergency response scenarios involving chloroprene handling facilities.

Key Features

• Validated detection range of 1–40 ppm chloroprene with ±25% accuracy under standard conditions (23°C, 50% RH, 100 mL sample volume)
• Pre-calibrated at factory using traceable NIST-traceable chloroprene reference standards
• Stable shelf life of 24 months when stored unopened at 10–30°C in original packaging
• Compatible exclusively with the KOMYO AP-20 dual-stroke hand pump (100 mL stroke volume, adjustable draw rate)
• Internally coated glass tubing ensures uniform reagent distribution and minimizes wall adsorption effects
• Batch-specific calibration certificate provided with each box of 10 tubes
• No power supply, batteries, or software required—fully operational in intrinsically safe environments

Sample Compatibility & Compliance

The 132SC tube is optimized for use in clean, dry air matrices. Performance may be affected by high humidity (>80% RH), particulate-laden air, or co-existing interfering gases such as chlorine, bromine, or unsaturated hydrocarbons (e.g., butadiene, isoprene). Cross-sensitivity data are documented in KOMYO’s Technical Bulletin TB-132SC Rev. 4. The tube meets requirements for field use under OSHA 1910.120 (HAZWOPER) initial hazard assessment protocols and supports preliminary exposure evaluation per ACGIH TLV® guidelines for chloroprene (TWA: 0.1 ppm). While not certified for CE marking or UKCA, its design adheres to ISO/IEC 17025-aligned manufacturing controls. Each production lot undergoes batch validation per JIS K 0321 Annex B, including precision testing across three concentration levels and inter-laboratory reproducibility assessment.

Software & Data Management

As a passive, analog measurement device, the 132SC tube does not interface with digital systems, software platforms, or data loggers. Quantitative interpretation remains manual—requiring visual alignment of the color front with the engraved scale under daylight-equivalent illumination. For traceability in occupational health records, users are advised to document tube lot number, sampling date/time, pump strokes, ambient temperature/humidity, and observer name alongside the recorded reading. When integrated into a broader industrial hygiene program, results may be entered manually into LIMS or EHS platforms supporting ISO 45001 clause 9.1.2 (performance evaluation). No electronic audit trail or 21 CFR Part 11 compliance is applicable.

Applications

• Routine spot-checking of chloroprene storage areas, transfer lines, and reactor vent stacks in synthetic rubber manufacturing plants
• Post-maintenance verification of system integrity following gasket or valve replacement
• First-responder triage during transportation incidents involving DOT Class 3 flammable liquids containing chloroprene
• Worker exposure screening during drum opening, sampling, or cleaning operations
• Supplemental verification during fixed-system alarm events to distinguish false positives from actual leaks
• Educational demonstrations of colorimetric gas analysis principles in university environmental engineering labs

FAQ

What is the minimum detectable concentration for the 132SC tube?

The lower limit of detection is 1 ppm under standard sampling conditions (100 mL, 1 stroke of AP-20 pump).
Can the tube be reused after sampling?

No. The 132SC is a single-use, disposable device. Chemical reaction is irreversible and tube integrity cannot be restored.
Is the AP-20 pump included with the 132SC tube?

No. The AP-20 manual pump must be purchased separately and is required for all KOMYO detection tubes.
How should expired tubes be disposed of?

Dispose as hazardous chemical waste per local regulations; reagent residue contains amine-based chromogenic compounds.
Does temperature affect reading accuracy?

Yes. Readings taken below 15°C or above 35°C require correction using the temperature compensation chart in the product insert.