SDL MODEL 1080 Environmental Infrared Gas Analyzer

Overview

The SDL MODEL 1080 Environmental Infrared Gas Analyzer is a fixed-installation, extractive-type continuous emission monitoring system (CEMS) engineered for regulatory-grade measurement of key gaseous pollutants in flue gas, ambient air, and industrial process streams. It operates on the principle of non-dispersive infrared (NDIR) absorption spectroscopy — a well-established, ASTM E1753-22 and ISO 12039-compliant methodology for quantifying trace and major gas species based on their unique fundamental vibrational absorption bands in the mid-infrared region (typically 2–14 µm). The analyzer is specifically configured for simultaneous, real-time quantification of carbon monoxide (CO), carbon dioxide (CO₂), methane (CH₄), sulfur dioxide (SO₂), and nitric oxide (NO) — all critical parameters under national and regional environmental compliance frameworks including China’s HJ 75–2017 and HJ 76–2017 standards, as well as EU IED Directive (2010/75/EU) and U.S. EPA Performance Specification 15 (PS-15) requirements. Its dual optical path design with micro-flow sensor-based signal modulation ensures high signal-to-noise ratio and long-term baseline stability, minimizing drift-induced recalibration frequency.

Key Features

• NDIR optical architecture with temperature-stabilized broadband IR source and dual-wavelength detection for cross-interference compensation
• Simultaneous multi-component analysis capability: up to five gases (CO, CO₂, CH₄, SO₂, NO) in a single sample stream without chromatographic separation
• Explosion-proof (Ex d IIB T4 Gb) and standard non-hazardous area configurations available per IEC 60079-0 and GB 3836 series
• Integrated micro-flow sensor generating pulsed electrical signals synchronized with optical chopping — enabling high-resolution absorbance detection and improved zero stability
• Full digital signal processing with automatic zero/span calibration cycles, self-diagnostic routines, and real-time fault logging compliant with IEC 61508 SIL 2 functional safety principles
• Short warm-up time: ≤5 minutes to operational readiness under ambient conditions (20–25°C), reducing downtime during routine maintenance or power recovery
• Intuitive menu-driven interface with dual-language (English/Chinese) backlit LCD display and tactile keypad navigation

Sample Compatibility & Compliance

The MODEL 1080 is designed for use with conditioned extractive sampling systems meeting ISO 16911-1:2013 requirements. It accepts gas samples at flow rates of 0.5–2.0 L/min, with inlet pressure tolerance of 80–120 kPa (abs) and particulate loading <1 mg/m³ (post-filtration). Moisture interference is mitigated via integrated Nafion™-based permeation dryers or optional chilled mirror dew point control. All gas path wetted materials are 316L stainless steel and PTFE-lined to prevent adsorption or catalytic reaction. The instrument meets electromagnetic compatibility (EMC) per EN 61326-1:2013 and environmental robustness per IEC 60529 IP54. It supports audit-ready data integrity protocols aligned with GLP/GMP documentation practices and provides timestamped event logs required for regulatory reporting under China’s MEP Order No. 39 and U.S. EPA 40 CFR Part 60 Subpart F.

Software & Data Management

The embedded firmware supports Modbus RTU/ASCII over RS-485 and optional Ethernet TCP/IP communication. Four to twenty milliamp (4–20 mA) analog outputs are individually assignable per measured component, with configurable scaling and fault current settings. Relay outputs (SPDT, 250 VAC/3 A) support alarm tripping, calibration initiation, or system interlock functions. Data export is enabled via USB host port (CSV format) or optional SD card logging (up to 1 year of 1-minute averaged records). Remote configuration and diagnostics are accessible through a secure web interface supporting HTTPS and role-based user authentication. Audit trail functionality records all parameter changes, calibration events, and maintenance actions with operator ID and UTC timestamps — satisfying FDA 21 CFR Part 11 electronic record/electronic signature (ERES) expectations when deployed in validated environments.

Applications

• Continuous emissions monitoring (CEM) at coal-fired, biomass, and waste-to-energy power plants
• Process gas analysis in cement kilns, glass furnaces, and iron & steel sintering lines
• Landfill and biogas upgrading facility methane and CO₂ concentration tracking
• Flue gas desulfurization (FGD) and selective catalytic reduction (SCR) system performance verification
• Environmental monitoring stations for urban air quality networks measuring ambient CO and NO
• Research laboratories conducting combustion efficiency studies and emission factor validation

FAQ

What gas species can the MODEL 1080 measure simultaneously?

It measures CO, CO₂, CH₄, SO₂, and NO concurrently in a single sample stream using dedicated NDIR channels.
Is the analyzer certified for hazardous area installation?

Yes — explosion-proof variants comply with IEC 60079-1 and GB 3836.1–2010 for Zone 1/21 applications.
Does it support remote calibration and diagnostics?

Yes — via embedded web server with HTTPS, Modbus TCP, and comprehensive event logging.
What regulatory standards does it meet for CEMS deployment?

HJ 75–2017 / HJ 76–2017 (China), ISO 12039, ASTM E1753, and EPA PS-15 (with appropriate sampling interface).
Can it integrate into existing DCS or SCADA systems?

Yes — through 4–20 mA analog outputs, Modbus RTU/ASCII, or optional OPC UA gateway modules.