maMoS-100/200 Fixed (In-Situ) Gas Analyzer

Overview

The maMoS-100/200 is a fixed-position, in-situ gas analyzer engineered for continuous, real-time monitoring of multiple gaseous components in industrial and environmental applications. Designed around dual-sensor architecture—supporting interchangeable electrochemical (EC) and non-dispersive infrared (NDIR) detection modules—the system delivers reliable, trace-level quantification of key process and emission gases without requiring laboratory-grade infrastructure. Its measurement principle relies on selective absorption spectroscopy (for NDIR channels) and amperometric current generation at gas-permeable electrodes (for EC sensors), both calibrated to ISO 12039, EN 15267, and EPA Method 3A/7E compliance frameworks. The instrument operates as a fully integrated CEMS subunit, incorporating sample conditioning (electronic refrigerated dryer, particulate filter, condensate removal via peristaltic pump), microprocessor-based signal processing, and automatic zero-measure cycling—enabling unattended operation across combustion, biogas, cement kiln, waste incineration, and ambient air quality monitoring scenarios.

Key Features

• Modular sensor configuration: Supports up to two simultaneous gas channels—either electrochemical (O₂, CO, NO, NO₂, SO₂, H₂S, Cl₂, H₂) or NDIR (CO, CO₂, CH₄, N₂O)—with factory-calibrated, field-replaceable sensor cartridges.
• Integrated sample conditioning: Built-in Peltier-cooled dryer (dew point ≤ 2 °C), hydrophobic particulate filter (≥ 99.9% @ 0.3 µm), and condensate evacuation via maintenance-free peristaltic pump.
• Auto-zero & auto-measure cycle: Fully programmable dual-phase sequence with independent timing control for zero calibration and active measurement phases.
• Robust mechanical design: IP54-rated ABS enclosure rated for industrial environments; operating temperature range 0–40 °C; storage range −20–+55 °C.
• Real-time analog & digital I/O: Dual 4–20 mA linear outputs (per channel), 0–10 V programmable voltage output, two user-configurable dry contact relays, and TTL-level RS232 interface for data logging or SCADA integration.
• Fast response performance: NDIR channels achieve T90 < 15 s (CO, CO₂, CH₄, N₂O); EC channels achieve T90 ≤ 45 s (O₂, CO, NOₓ, SO₂, H₂S, H₂).

Sample Compatibility & Compliance

The maMoS-100/200 is validated for use with flue gases, biogas streams, ambient air, and process off-gases containing moisture (5–95% RH, non-condensing), particulates (< 10 mg/m³), and temperatures up to 1600 °C when paired with optional high-temperature probe assemblies (7 mm OD, 750–1500 mm length, ceramic-sheathed). All electrochemical sensors are pre-calibrated at the manufacturer’s facility per ISO 17025-accredited procedures; no field recalibration is required during initial commissioning. NDIR modules require no periodic zero/span adjustment under stable operating conditions. The system meets CE marking requirements for EMC and LVD directives, supports GLP/GMP audit trails via timestamped RS232 data export, and complies with key regulatory test methods including EN 14181 (QAL2/QAL3), US EPA PS-11, and ISO 21877 for biogas analysis.

Software & Data Management

Data acquisition and configuration are managed via the embedded microcontroller’s serial protocol—compatible with standard Modbus RTU or ASCII command sets over RS232. No proprietary software is required; integration into existing DCS, PLC, or cloud-based IIoT platforms is achieved using open-protocol drivers. All analog outputs are linearized and temperature-compensated per channel. Measurement averaging time is configurable from 2–32 seconds to optimize noise rejection versus dynamic response. Timestamped raw data (gas concentration, status flags, internal diagnostics) can be streamed continuously at 1 Hz resolution. For FDA 21 CFR Part 11 compliance, external data loggers with electronic signature capability may be deployed in conjunction with the instrument’s deterministic output behavior and hardware-level fault reporting.

Applications

• Continuous monitoring of greenhouse gas emissions from boiler and furnace stacks (O₂, CO, NOₓ, SO₂, CO₂)
• In-line biogas composition analysis in anaerobic digesters (CH₄, CO₂, H₂S, O₂, H₂) for process optimization and safety interlock
• Combustion efficiency control in cement rotary kilns, glass melting furnaces, and municipal waste incinerators
• Ambient air quality stations measuring CO (0–2000 ppm), CH₄ (0–5 vol%), or N₂O (0–500 ppm) per WHO/EPA reference methodologies
• Leak detection and confined-space safety monitoring in petrochemical, wastewater, and semiconductor fabrication facilities

FAQ

Is the maMoS-100/200 certified for regulatory CEMS compliance?
Yes—it meets the functional requirements of EN 15267-3 for automated measuring systems and is suitable for QAL2/QAL3 validation under EN 14181. Final certification depends on site-specific QA/QC implementation and third-party verification.
Can NDIR and electrochemical sensors operate simultaneously in one unit?
Yes—the maMoS-100/200 supports hybrid configurations: e.g., CO (NDIR) + O₂ (EC), or CH₄ (NDIR) + H₂S (EC), with independent signal processing and output routing.
What maintenance intervals are recommended for the sample conditioning system?
The particulate filter should be inspected quarterly; the Peltier cooler requires no scheduled service; the peristaltic pump tubing is rated for ≥12 months of continuous operation at typical flue gas dew points.
Does the instrument support remote firmware updates?
No—firmware is stored in write-protected flash memory; updates require physical access and are performed only by authorized service personnel using diagnostic firmware loaders.
Are calibration gases required for routine operation?
Zero gas (N₂ or synthetic air) is needed only for periodic QAL2 verification (typically annually); span calibration is optional and sensor-dependent—electrochemical cells retain calibration for ≥12 months under stable thermal/humidity conditions.