2B Technologies Model 211 Scrubberless Ozone Analyzer

Overview

The 2B Technologies Model 211 Scrubberless Ozone Analyzer is a high-precision, field-deployable instrument engineered for continuous, interference-free measurement of ambient ozone (O₃) concentrations in complex environmental matrices. It employs dual-beam ultraviolet (UV) absorption spectroscopy at 254 nm — a well-established, NIST-traceable physical principle with proven selectivity for ozone — combined with an integrated gas-phase scrubberless reference technique. Unlike conventional chemiluminescence or single-beam UV analyzers, the Model 211 eliminates chemical interferences—including particulate matter, mercury vapor, and volatile organic compounds (VOCs)—by dynamically generating a zero-ozone reference stream *in situ* via controlled reaction between sample air and precisely metered nitric oxide (NO). This proprietary approach ensures quantitative removal of ozone without altering background matrix composition, enabling robust operation even in heavily polluted urban, industrial, or near-source monitoring environments. The analyzer meets U.S. EPA Federal Equivalent Method (FEM) criteria for regulatory-grade ozone monitoring and is designed for long-term unattended deployment under GLP-compliant data integrity frameworks.

Key Features

• Dual-beam UV photometric platform with temperature-stabilized 254 nm low-pressure mercury lamp and matched photodiodes for high signal stability and drift rejection
• Scrubberless reference generation using trace NO addition (from external cylinder or optional internal N₂O photolysis generator), eliminating mechanical scrubbers and associated maintenance
• DewLine™ active dew-point control system to suppress water vapor absorption artifacts across full operational humidity range (0–100% RH)
• Integrated long-life diaphragm sampling pump (rated >20,000 hours) with real-time flow monitoring and electronic mass flow control (nominal 2.0 L/min, minimum 1.2 L/min)
• Touchscreen user interface with intuitive menu navigation, local data visualization, and configurable averaging intervals (10 s to 1 h)
• Rack-mountable 19-inch chassis (43 × 37 × 14 cm; 6.5 kg) with industrial-grade thermal management for operation from 10 °C to 50 °C and 30–1000 mbar pressure range
• Onboard data logger storing up to 16,333 records (expandable indefinitely via USB flash drive) with timestamped metadata including T/P corrections
• Comprehensive analog and digital I/O: isolated 0–2.5 V output, optional 4–20 mA loop, RS-232 serial (2400/4800/19200 bps), and USB host/device modes

Sample Compatibility & Compliance

The Model 211 is validated for direct analysis of ambient air, stack effluents, and indoor air without pre-filtration beyond standard particulate removal (optional external filter available). Its scrubberless architecture inherently rejects interference from NO₂, SO₂, H₂S, hydrocarbons, and aerosols—gases and particles that compromise chemiluminescent or electrochemical ozone sensors. The instrument complies with U.S. EPA Reference and Equivalent Method requirements for ambient ozone monitoring (40 CFR Part 53), supports ISO 13964:2021 (ambient air quality — ozone measurement by UV absorption), and provides NIST-traceable calibration certificates. All firmware and data handling protocols support audit-ready operation under FDA 21 CFR Part 11 and EU Annex 11 guidelines when configured with time-stamped, password-protected logging and electronic signature options.

Software & Data Management

2B Technologies’ proprietary DataViewer software enables real-time graphical display, remote configuration, and export of time-series data in CSV or Excel-compatible formats. Internal memory stores calibrated ozone concentration (ppb, ppm, µg/m³), temperature, pressure, flow rate, lamp intensity, and DewLine status with automatic T/P correction applied per user-defined settings. USB flash storage supports multi-year archival without host dependency. Optional GPS module logs georeferenced coordinates (latitude, longitude, altitude) synchronized with each measurement record—critical for mobile monitoring networks and source attribution studies. Firmware updates are delivered via secure HTTPS and validated through cryptographic checksums to ensure data integrity and regulatory compliance.

Applications

• Ambient air quality monitoring networks (EPA, EEA, national agencies)
• Photochemical smog research and ozone precursor studies
• Indoor air quality assessment in laboratories, cleanrooms, and healthcare facilities
• Calibration transfer standards and reference instrument validation
• Mobile monitoring platforms (vehicles, drones, balloons) with GPS integration
• Industrial hygiene and occupational exposure assessment (OSHA/NIOSH compliance)
• Long-term trend analysis requiring sub-ppb detection limits and <3 ppb/year baseline stability

FAQ

What is the detection limit and measurement range?
The Model 211 achieves a 2σ detection limit of 1.0 ppb with a linear dynamic range spanning 0.5 ppb to 2.0 ppm.
How often is calibration required?
Annual calibration is recommended; built-in zero and span verification routines support daily QC checks using certified gas standards.
Does the instrument require consumables besides NO or N₂O?
No. The UV lamp has a typical lifetime exceeding 10,000 hours; the pump is rated for >20,000 hours; no filters or reagents are consumed during normal operation.
Can it operate on battery power?
Yes—when powered by 11–14 V DC (e.g., vehicle or solar-battery systems), it draws only 0.75 A at 12 V (9 W), making it suitable for off-grid deployments.
Is remote diagnostics supported?
Yes—RS-232 and USB interfaces allow full command-line control, real-time parameter readout, and firmware updates via standard terminal emulation or 2B’s software suite.