GasBadgeEx GB90 Portable Combustible Gas Detector

Overview

The GasBadgeEx GB90 is a compact, intrinsically safe portable combustible gas detector engineered for real-time monitoring of flammable hydrocarbon vapors and hydrogen in industrial and emergency response environments. It operates on the catalytic bead (pellistor) sensing principle—where target gases undergo controlled oxidation on a heated catalyst surface, producing a measurable change in resistance proportional to gas concentration. This method delivers high reproducibility and long-term stability for %LEL (Lower Explosive Limit) measurements across diverse fuel gases including methane, propane, butane, hydrogen, natural gas, LPG, and town gas. Designed for field personnel operating in hazardous locations, the GB90 complies with international intrinsic safety requirements and integrates robust mechanical and environmental protection without compromising ergonomics or operational clarity.

Key Features

• Intrinsically safe design certified to Ex ia d IIC T4 per Chinese national explosion-protection standards (Certificate No. 20621872), suitable for Zone 0/1 hazardous areas
• Catalytic combustion sensor with 0–100% LEL measurement range and 0.1% LEL resolution, optimized for fast response (T90 < 15 seconds)
• Backlit LCD display with intuitive icon-based interface and direct %LEL readout—no interpretation required in low-light or high-stress conditions
• Triple-mode alarm system: audible (≥95 dB), visual (bright LED), and haptic vibration—configurable with user-defined high/low thresholds, latching, and mute functions
• Polycarbonate housing rated IP67 for dust-tight and temporary water immersion resistance; EMI-shielded construction ensures reliable operation near radio transmitters or variable-frequency drives
• Rechargeable lithium-ion battery supporting ≥15 hours of continuous operation under typical ambient conditions (–40 °C to +60 °C operating temperature; 0–99% RH non-condensing humidity)
• Password-protected configuration mode prevents unauthorized calibration or parameter changes—supports GLP-aligned operational integrity

Sample Compatibility & Compliance

The GB90 detects combustible gases that react catalytically at elevated temperatures, including saturated aliphatic hydrocarbons (e.g., methane, ethane, propane), unsaturated species (e.g., ethylene), hydrogen, and common fuel mixtures (natural gas, LPG, coal gas). It is not intended for inert, non-combustible, or toxic gases such as CO, H₂S, or NO₂—those require electrochemical or PID-based detection platforms. Regulatory compliance includes China’s Manufacture License for Measuring Instruments (Shanghai License No. 沪制00000301), and its intrinsic safety architecture aligns with IEC 60079-0 and IEC 60079-11 principles. While not FDA 21 CFR Part 11–certified (as it lacks electronic signature capability), its data logging functionality supports audit-ready records for internal safety management systems.

Software & Data Management

The GB90 incorporates onboard memory capable of storing up to 30 days of minute-interval sampling data (43,200 data points), plus peak concentration values and timestamped alarm logs (up to 15 events with duration tracking). Data retrieval occurs via integrated infrared (IR) port—compatible with standard IR-to-USB adapters—enabling seamless transfer to Windows-based analysis software. Exported files are saved in CSV format for integration into enterprise EHS platforms, incident reporting tools, or statistical process control dashboards. No proprietary drivers or cloud subscriptions are required; all firmware updates and configuration utilities are distributed as standalone executables validated for Windows 10/11 LTS versions.

Applications

• Confined space entry verification in petrochemical plants, refineries, and utility vaults
• Leak detection during pipeline maintenance, LNG terminal operations, and compressor station inspections
• Emergency response by fire departments and HAZMAT teams during gas-related incidents
• Pre-startup safety checks in boiler rooms, generator enclosures, and laboratory fume hood zones
• Environmental health and safety (EHS) audits requiring time-weighted average (TWA) or short-term exposure limit (STEL) documentation
• Contractor oversight in facilities governed by ISO 45001 or OHSAS 18001 occupational health management frameworks

FAQ

What gases does the GasBadgeEx GB90 detect?
It detects combustible gases measurable by catalytic combustion, including methane, propane, hydrogen, butane, ethane, natural gas, LPG, and town gas. It does not detect chlorine, ammonia, carbon monoxide, or sulfur dioxide.
Is the device suitable for use in extreme cold or high humidity?
Yes—it operates continuously from –40 °C to +60 °C and up to 99% relative humidity (non-condensing), making it appropriate for arctic field work and tropical refinery environments.
How is calibration performed, and how often is it recommended?
Calibration uses certified 50% LEL methane or propane standard gas and is performed via the IR interface or manual button sequence. Factory recommendation is bump testing before each shift and full calibration every 30 days or after exposure to sensor-poisoning compounds (e.g., silicones, lead, sulfides).
Can logged data be exported to third-party EHS software?
Yes—CSV-formatted datasets are fully interoperable with common EHS platforms (e.g., Intelex, Sphera, ETQ Reliance) and spreadsheet-based trend analysis workflows.
Does the GB90 support multi-gas detection?
No—it is a single-gas instrument optimized for %LEL measurement. Multi-gas configurations require separate models such as the GasBadge Pro series with modular sensor bays.