Servomex SERVOFLEX Micro 5100 i.s Intrinsically Safe Portable Gas Analyzer

Overview

The Servomex SERVOFLEX Micro 5100 i.s is an intrinsically safe, portable multicomponent gas analyzer engineered for high-integrity oxygen (O₂) and carbon dioxide (CO₂) concentration measurement in hazardous areas classified as Zone 0 and Zone 1 under ATEX and IECEx directives. Unlike conventional analyzers requiring purging or external safety barriers, the 5100 i.s achieves full Zone 0 certification through rigorous intrinsic safety design—eliminating the need for pressurization, ventilation, or flameproof enclosures. Its dual-sensor architecture leverages two distinct physical measurement principles: paramagnetism for O₂ and single-beam, single-wavelength non-dispersive infrared (NDIR) spectroscopy for CO₂. This hybrid approach ensures selectivity, long-term stability, and immunity to cross-interference from common background gases such as methane, nitrogen, hydrogen, or water vapor. The instrument operates without consumables or electrochemical depletion, delivering consistent performance across extended field deployments typical of refinery turnaround monitoring, confined space entry verification, biogas composition screening, and industrial hygiene surveys.

Key Features

• Intrinsically safe design certified to ATEX Ex II 1G Ex ia IIC T4 and IECEx Ex ia IIC T4—approved for continuous operation in Zone 0, the most stringent hazardous area classification.
• Paramagnetic O₂ sensor with dual variants: standard and high-accuracy configurations—both offering rapid response (<15 s T₉₀), zero drift over time, and no reliance on electrolytes or zirconia membranes.
• Patented long-life infrared source and thermopile detector for CO₂ measurement, enabling stable baseline performance and minimal calibration frequency (typical interval ≥6 months under routine use).
• Ruggedized housing rated IP65—resistant to dust ingress and low-pressure water jets—suitable for outdoor, offshore, and industrial environments.
• Integrated rechargeable lithium-ion battery providing up to 12 hours of continuous operation; supports hot-swappable charging via optional cradle or USB-C input.
• Intuitive user interface co-developed with end-users—menu-driven navigation, configurable alarm thresholds (audible and visual), and real-time trend display on backlit monochrome LCD.
• Onboard data logging stores up to 200 timestamped measurements with gas ID, concentration, date/time, and operator tag—exportable via USB for traceability and QA/QC reporting.

Sample Compatibility & Compliance

The 5100 i.s is validated for direct analysis of flammable and toxic sample streams without pre-conditioning, provided gas temperature remains within −20 °C to +50 °C and condensate-free conditions are maintained. It complies with EN 60079-0, EN 60079-11, and IEC 60079-26 for equipment intended for explosive atmospheres. For regulatory alignment, the analyzer supports GLP-compliant workflows: all configuration changes, calibration events, and alarm triggers are automatically logged with timestamps and user identification (where enabled). While not FDA 21 CFR Part 11–certified out-of-the-box, audit trail functionality meets ISO/IEC 17025 requirements for accredited testing laboratories conducting environmental or occupational exposure assessments per OSHA 29 CFR 1910.120 or EN 14042.

Software & Data Management

Data retrieval occurs via USB mass storage mode—no proprietary drivers required. Exported CSV files contain columns for measurement ID, UTC timestamp, O₂ (% vol), CO₂ (% vol), battery level, ambient temperature, and alarm status flags. Optional PC software (Servomex Insight™ Lite) enables batch calibration validation, statistical summary generation (mean, SD, min/max), and overlay plots for longitudinal site monitoring. All firmware updates are delivered as signed binary packages with SHA-256 checksums to ensure integrity during field deployment.

Applications

• Confined space entry pre-check and continuous monitoring per ANSI Z117.1 and HSE GS5 guidelines.
• Biogas quality control at anaerobic digesters—verifying O₂ ingress (safety) and CO₂ content (energy value estimation).
• Hydrocarbon processing units: inerting verification during vessel purging, catalyst regeneration oversight, and flare gas composition spot checks.
• Mine ventilation air analysis for firedamp dilution assessment and spontaneous combustion early warning.
• Pharmaceutical cleanroom environmental monitoring where O₂ deviation may indicate HVAC failure or door breach.

FAQ

Is the 5100 i.s suitable for measuring oxygen in hydrogen-rich atmospheres?
Yes—the paramagnetic sensor is inherently immune to H₂ interference and maintains accuracy across H₂ concentrations up to 100% vol.
Can the instrument be calibrated in the field without specialist tools?
Yes—zero calibration uses ambient air (20.9% O₂, <400 ppm CO₂); span calibration requires certified span gases traceable to NIST or UKAS standards—no hardware adjustment needed.
What maintenance intervals are recommended?
Sensor performance verification every 6 months; optical path cleaning only if particulate loading is observed; battery health check annually.
Does the internal pump option affect intrinsic safety certification?
No—the integrated pump is designed and certified as part of the complete Ex ia system; its inclusion does not alter Zone 0 compliance.
How is data integrity ensured during power loss?
All measurements are written to non-volatile memory immediately upon acquisition; no data is held solely in RAM.