Servomex MultiExact 4100 Multi-Gas Analyzer

Overview

The Servomex MultiExact 4100 is a modular, multi-stream gas analyzer engineered for high-integrity industrial process monitoring and quality assurance in demanding production environments. It operates on a hybrid sensor architecture—integrating paramagnetic detection for oxygen, zirconia electrochemical cells for high-concentration O₂, gas filter correlation (GFC) for selective trace-level CO, CO₂, CH₄, and N₂O measurement, single-beam single-wavelength (SBSW) infrared absorption for %-level hydrocarbon and acid gas quantification, thermal conductivity detection (TCD) for binary gas ratios (e.g., He in Ar, N₂ in Ar), and optional alumina-based humidity sensing. Unlike fixed-sensor analyzers, the MultiExact 4100 allows configuration of up to four independent sample streams—each with dedicated sensor sets—enabling simultaneous analysis of diverse gas matrices without cross-contamination or switching delays. Its design prioritizes long-term stability, low drift (<±0.5% FS/year for calibrated channels), and minimal maintenance intervals—critical for unattended operation in air separation units (ASUs), medical gas manufacturing facilities, and mobile analytical laboratories.

Key Features

• Modular sensor architecture supporting concurrent deployment of paramagnetic, zirconia, GFC, SBSW IR, TCD, and alumina moisture sensors across up to four isolated sample paths
• Trace-level O₂ detection down to 10 ppb (paramagnetic) and %-range O₂ measurement via zirconia—enabling dual-range capability in one instrument
• GFC technology provides interference-free quantification of CO, CO₂, CH₄, and N₂O at sub-ppm levels—even in high-background N₂ or Ar matrices
• SBSW IR optics deliver robust %-level accuracy for CO₂, CO, CH₄, and N₂O with no moving parts and inherent resistance to pressure and flow fluctuations
• TCD module optimized for inert gas binary mixtures: He/Ar, He/N₂, Ar/N₂, and O₂/N₂—with temperature-compensated calibration and <±0.1% FS repeatability
• Integrated sample conditioning system with heated sample lines (up to 180 °C), particulate filtration, and optional catalytic converters for CO oxidation prior to IR measurement
• Field-upgradable firmware and plug-in sensor modules—supporting future expansion without hardware replacement

Sample Compatibility & Compliance

The MultiExact 4100 accommodates a broad spectrum of industrial and medical gases—including liquid nitrogen vaporized streams, high-purity argon from cryogenic distillation, compressed medical air, and helium blends used in respiratory therapy. It meets mechanical and electrical requirements per IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions), and its enclosure complies with IP65 rating for harsh plant-floor deployment. While not intrinsically safe by default, it supports ATEX/IECEx Zone 2 configurations via external sample extraction and pressure regulation. For regulated environments, the analyzer supports optional 21 CFR Part 11 compliance features—including electronic signatures, role-based user access (admin/operator/auditor), and immutable audit trails for all calibration, configuration, and data export events. It is routinely deployed in facilities certified to ISO 9001 (quality management), ISO 13485 (medical device manufacturing), and EN 13957 (medical oxygen specifications).

Software & Data Management

The embedded Servomex Insight™ software provides real-time visualization of all active channels, trend logging at user-defined intervals (1 sec to 1 hr), and configurable alarm thresholds with relay outputs and SNMP trap generation. Data export is supported via Modbus TCP, Profibus DP, and Ethernet/IP protocols for seamless integration into DCS, SCADA, and MES platforms. The optional Servomex DataHub™ PC application enables advanced diagnostics—including sensor health monitoring, zero/span drift trending, and predictive maintenance alerts based on signal noise and response time degradation. All raw analog outputs (4–20 mA) are independently scalable and isolated, ensuring compatibility with legacy PLC systems. Historical data is stored locally on a removable SD card (up to 32 GB) with timestamped CSV export—retaining ≥12 months of 1-minute averaged data per channel under standard usage.

Applications

• Air Separation Units (ASUs): Continuous verification of product oxygen purity (≥99.5% v/v), nitrogen purity (≤5 ppm O₂), and argon purity (≤1 ppm O₂); real-time monitoring of CO₂ breakthrough at molecular sieve beds
• Medical Gas Production: Batch certification of USP/EP-grade O₂, N₂, medical air, and helium per ISO 8573-1 (Class 2 for particles, Class 3 for water, Class 4 for oil) and ASTM D6866 (biobased content verification where applicable)
• Petrochemical & Hydrogen Facilities: Monitoring purge gas composition during catalyst regeneration, detecting CO slip in hydrogen reformate streams, and verifying inerting gas integrity before vessel entry
• Mobile Calibration Laboratories: Field-deployable verification of fixed gas detectors and portable meters—leveraging traceable NIST-traceable calibration standards and onboard zero/span validation routines
• Pharmaceutical Manufacturing: Environmental monitoring of inert gas blankets in lyophilization chambers and glovebox purging systems—ensuring O₂ <100 ppm and H₂O <10 ppm

FAQ

Can the MultiExact 4100 measure both trace O₂ and %-level O₂ simultaneously on the same stream?
Yes—by installing both the paramagnetic and zirconia sensor modules on a single sample path, the analyzer delivers parallel readings: paramagnetic for 0–100 ppm and zirconia for 0–100% O₂, with automatic range-switching logic.
Is third-party alumina humidity sensor integration supported out-of-the-box?
Yes—the analyzer includes a standardized 4–20 mA input channel with configurable scaling and linearization tables, enabling direct integration of certified alumina hygrometers (e.g., Michell Easidew, Vaisala HMP series).
What calibration standards are required for routine maintenance?
Certified gas standards traceable to NIST or UKAS are recommended: zero gas (high-purity N₂ or Ar), span gases matching target analytes (e.g., 100 ppm CO in N₂, 5% CO₂ in air), and moisture standards for alumina sensors (e.g., 1 ppmv H₂O in N₂ generated via permeation tube).
Does the system support remote diagnostics and firmware updates?
Yes—via secure HTTPS-enabled web interface and optional VPN tunneling; firmware updates are validated with SHA-256 checksums and require dual-user approval for critical system modules.
How is sample cross-talk prevented when analyzing four streams?
Each of the four sample paths features physically isolated stainless-steel manifolds, independent mass flow controllers, dedicated sample pumps, and solenoid-valve isolation—eliminating carryover between streams even during rapid sequence cycling.