KOMYO RIKAGAKU Silane Gas Detection Tube Model 240S

Overview

The KOMYO RIKAGAKU Silane Gas Detection Tube Model 240S is a precision-engineered, single-use colorimetric indicator tube designed for rapid, on-site detection and semi-quantitative measurement of silane (SiH₄) gas concentrations in ambient air or industrial process streams. Developed by KOMYO RIKAGAKU—Japan’s pioneering and world-leading manufacturer of gas detection tubes since 1947—the 240S tube operates on the principle of selective chemical reaction: silane gas diffuses through a porous glass tube filled with a proprietary reagent bed (typically palladium-activated silica gel or copper salt–impregnated support), inducing a distinct, irreversible color change (typically from white to brown or black) along a linear chromatic front. The length of the stained zone correlates directly with silane concentration, as calibrated against NIST-traceable reference standards under controlled temperature (20–25°C) and humidity (30–70% RH) conditions. Each tube is individually sealed in aluminum foil with desiccant to ensure shelf stability up to 24 months at room temperature. No power, calibration gas, or electronics are required—only the standardized AP-20 hand-operated bellows pump (sold separately), which delivers a precise 100 mL stroke volume per actuation.

Key Features

• Two-range dual-scale calibration: Primary scale covers 1–50 ppm; secondary fine-scale extends sensitivity to 0.5–25 ppm—enabling flexible use across leak-checking, confined-space entry verification, and semiconductor fab ambient monitoring.
• High selectivity for silane: Minimal cross-sensitivity to hydrogen, ammonia, phosphine, arsine, or common VOCs—validated per JIS K 0321 Annex B interference testing protocols.
• Consistent response time: Full color development achieved within 60–90 seconds after sampling completion, supporting high-throughput field screening.
• Traceable metrology: Each production lot undergoes gravimetric and dynamic calibration using certified silane-in-nitrogen standard gases (±3% expanded uncertainty, k=2).
• Robust physical design: Borosilicate glass body (outer diameter 6 mm, length 130 mm) with laser-etched graduation marks and permanent ink labeling resistant to solvent exposure and UV degradation.

Sample Compatibility & Compliance

The 240S tube is validated for use with ambient air, dry nitrogen, and inert carrier gases (e.g., argon, helium). It is not recommended for humidities exceeding 80% RH or for sampling directly from high-velocity gas streams (>2 m/s) without flow-reduction adapters. All KOMYO RIKAGAKU detection tubes comply with Japanese Industrial Standard JIS K 0321 (“Method for Determination of Gaseous Pollutants Using Indicator Tubes”) and align with ISO 8573-6 Annex C for compressed air purity assessment. While not intended for regulatory compliance reporting under EPA Method TO-15 or OSHA ID-250, the 240S is widely accepted as a Tier-1 screening tool in GLP-aligned semiconductor cleanroom QA/QC workflows and emergency response protocols per NFPA 55 and SEMI S2 guidelines.

Software & Data Management

As a passive, analog detection system, the 240S requires no software interface or digital data logging. However, quantitative results may be documented manually or via mobile applications such as KOMYO’s free “TubeScan Pro” (iOS/Android), which supports image-based stain-length measurement, batch record generation (including operator ID, location tag, date/time stamp), and export to CSV or PDF for internal audit trails. For laboratories operating under FDA 21 CFR Part 11 or ISO/IEC 17025, manual logbooks must include pump actuation count, observed stain endpoint, environmental conditions, and analyst signature—consistent with ALCOA+ data integrity principles.

Applications

• Leak detection in silane delivery systems (cylinders, manifolds, abatement units) within semiconductor fabrication facilities.
• Routine ambient monitoring near LPCVD and PECVD tools where silane is used as a precursor.
• Emergency response verification prior to confined-space entry in photovoltaic manufacturing or research labs.
• Educational demonstrations of gas-phase redox chemistry and stoichiometric detection principles.
• Pre-commissioning validation of gas cabinet ventilation interlocks and scrubber efficiency.

FAQ

What is the shelf life of the 240S tube, and how should it be stored?
Unopened tubes retain accuracy for 24 months from manufacture date when stored at 5–30°C in original foil packaging, away from direct sunlight and organic vapors.
Can the 240S tube be reused after sampling?
No—each tube is a single-use, irreversible chemical sensor. Reuse compromises accuracy and violates JIS K 0321 Section 5.2 requirements.
Is the AP-20 pump included with the 240S tube purchase?
No—the AP-20 handheld bellows pump is a separate accessory (KOMYO P/N AP-20); one pump serves all 300+ KOMYO tube types.
How does temperature affect measurement accuracy?
Readings deviate ±0.5% per °C outside the 20–25°C calibration range; correction factors are provided in the KOMYO Technical Manual Rev. 8.3 (2023).
Are Safety Data Sheets (SDS) available for the reagent inside the tube?
Yes—SDS for the 240S internal reagent (Palladium-impregnated silica gel, UN 3285, Class 9) is accessible via KOMYO’s global portal under Document ID SDS-240S-EN.