iTX Multi-Gas Detector by Industrial Scientific

Overview

The iTX Multi-Gas Detector is a rugged, intrinsically safe portable instrument engineered for real-time, simultaneous detection of up to six hazardous gases in industrial, environmental, and confined-space applications. Built upon a modular electrochemical and catalytic bead sensor architecture, the iTX employs industry-standard measurement principles: combustible gas (LEL/CH₄) detection via catalytic combustion; oxygen and toxic gases (e.g., CO, H₂S, Cl₂, NO₂, SO₂, NH₃, HCN, PH₃, ClO₂) via precision electrochemical cells; and optional hydrogen detection via dedicated electrochemical or semiconductor-based sensing elements. Its design adheres to fundamental performance requirements defined in IEC 60079-0, IEC 60079-11, and UL 913 (Class I, Division 1, Groups A–D), ensuring reliable operation in classified hazardous locations. The device supports both personal exposure monitoring and area surveillance, with configurable alarm thresholds aligned to OSHA PELs, ACGIH TLVs®, and ISO 10872 (ambient air quality) reference values.

Key Features

• Modular, field-replaceable sensor configuration supporting up to six simultaneous gases from a library of 17 certified sensor options—including Cl₂, ClO₂, CO, H₂S, HCN, NO₂, NH₃, O₂, PH₃, SO₂, CH₄, LEL, H₂, NO, HCl, and more
• Intrinsically safe construction: 304 stainless steel housing rated IP65; certified to UL/CSA Class I, Div. 1, Groups A–D; ATEX Ex ia I/IIC T4; MSHA approval for CH₄/air mixtures
• Dual power system: Rechargeable Li-ion battery (24 hr typical runtime) or replaceable AA alkaline pack (12 hr typical); intelligent over-range protection for LEL/CH₄ sensors automatically de-energizes circuitry above 100% LEL or 5.0% vol CH₄ to preserve calibration integrity and extend sensor life
• Four-electrode NH₃ sensor architecture for enhanced long-term stability and reduced drift under variable humidity conditions
• High-resolution detection: 50 ppm HC resolution at LEL scale; sub-ppm resolution for Cl₂, NO₂, SO₂, HCN, ClO₂, and PH₃ (0.01 ppm)
• Integrated RF interference (RFI) shielding validated per EN 50081-2; robust immunity in electrically noisy plant environments
• 103 dB audible alarm + visual strobe + vibration alert for high-noise areas; user-configurable alarm setpoints, delay timers, and latching/non-latching behavior
• On-device data logging: 18,000 data points (≈300 hours at 1-min intervals); stores TWA, STEL, peak values, user ID, location tags (via iButton®), and timestamped event logs

Sample Compatibility & Compliance

The iTX is validated for continuous ambient air sampling across temperature ranges of –20 °C to +50 °C and relative humidity of 15–95% RH (non-condensing). Sensor cross-sensitivity profiles comply with ASTM D6792 (standard practice for calibration of electrochemical gas detectors) and meet functional safety expectations outlined in IEC 61508 SIL 2 for gas detection subsystems. All electrochemical sensors are CE-marked and manufactured to ISO 9001-certified processes. Device firmware and calibration records support audit readiness for GLP, GMP, and OSHA 1910.120 compliance programs. Optional iButton® integration enables traceable chain-of-custody for field measurements per ISO/IEC 17025 requirements.

Software & Data Management

Data acquisition and instrument management are supported via the DS2 Docking Station platform, enabling automated bump testing, zero/span calibration, firmware updates, and secure data export in CSV or XML formats. Calibration history, alarm logs, and sensor diagnostics are stored with full audit trail—supporting FDA 21 CFR Part 11-compliant electronic signatures when used with validated DS2 configurations. The onboard menu-driven OS allows users to configure 24 parameters without PC dependency: TWA/STEL averaging windows, data logging interval, overwrite policy, password-protected calibration access, display contrast, backlight timeout, and unit preferences (ppm, %LEL, %vol). All settings persist through battery replacement and firmware updates.

Applications

The iTX serves mission-critical roles across multiple sectors: confined space entry verification (OSHA 1910.146), wastewater treatment plant odorant and H₂S monitoring, chemical manufacturing leak detection, refinery turnaround safety sweeps, landfill gas (CH₄/CO₂/H₂S) screening, ammonia refrigeration system integrity checks, and municipal utility tunnel air quality assurance. Its compact form factor (121 × 81 × 43 mm, 524.5 g) and optional iSP integrated sampling pump enable hands-free belt-worn operation or remote draw sampling up to 30 meters. Regulatory alignment extends to EPA Method TO-15 (VOC screening), ISO 16000-23 (indoor air), and EN 12021 (breathing air purity).

FAQ

What certifications does the iTX hold for hazardous area use?
It carries UL/CSA Class I, Division 1, Groups A–D; ATEX Ex ia I/IIC T4; and MSHA approval for methane/air mixtures.
Can the iTX be calibrated using a single mixed-gas standard?
Yes—the Quick Calibration function allows simultaneous multi-sensor calibration using a certified multi-component gas mixture, reducing calibration time and gas consumption.
Is data export compatible with enterprise EHS platforms?
DS2-generated CSV/XML files integrate with common EHS software including Intelex, Sphera, and VelocityEHS via standardized schema mapping.
How is sensor lifespan managed during high-concentration exposure?
The LEL/CH₄ over-range shutdown feature, combined with electrochemical sensor auto-zero recovery algorithms, significantly reduces irreversible poisoning and extends usable service life beyond 24 months under typical industrial conditions.
Does the iTX support wireless connectivity?
Wireless capability (Bluetooth/Wi-Fi) is available as a future-ready option (designated “A” in ordering code), currently under final regulatory review for global markets.