Graywolf AS XM Atmospheric Multifunctional Monitoring System

Overview

The Graywolf AS XM Atmospheric Multifunctional Monitoring System is an integrated, field-deployable environmental measurement platform engineered for real-time, multi-parameter assessment of indoor and outdoor air quality in public spaces—including transportation hubs, schools, hospitals, commercial buildings, and municipal infrastructure. Built upon Graywolf’s proprietary Wolf OS embedded computing architecture and compatible with the WolfSense software suite, the AS XM operates as a modular, sensor-agnostic host system capable of simultaneously acquiring, processing, and contextualizing data from up to dozens of interchangeable probes. Its core measurement principles include electrochemical and photoionization detection (PID) for toxic gases, non-dispersive infrared (NDIR) for CO₂, laser scattering for particulate matter (PM), thermal anemometry for airflow, and capacitive sensing for humidity—ensuring trace-level sensitivity, high temporal resolution, and metrological consistency across operational environments. Designed for both short-term surveying and unattended long-term monitoring, the AS XM meets the functional requirements of ISO 16000-23 (indoor air quality—particulate matter), ISO 8573-1 (compressed air purity), and ASTM D6196 (selection of sorbents for VOC sampling), supporting compliance-driven workflows in facility management and public health surveillance.

Key Features

• Modular architecture centered on a single Wolf OS–based embedded host—eliminating external controllers or interface converters
• Real-time simultaneous acquisition of >25 gas species (e.g., TVOC, HCHO, CO₂, O₃, NO₂, SO₂, H₂S, NH₃, Cl₂, HF), with selectable units (ppm, ppb, µg/m³, % vol)
• Six-channel optical particle counter (0.3–25 µm size range), reporting both number concentration and mass concentration (PM₂.₅, PM₁₀, TSP) in µg/m³ or mg/m³
• Dual-mode airflow measurement: hot-wire anemometry (0.01–100 m/s) and Pitot tube integration for duct and exhaust applications
• Integrated environmental sensors for barometric pressure, differential pressure, temperature (via thermocouple or RTD inputs), and relative/absolute/humidity ratio metrics
• Configurable multi-threshold alarms: independent high/low warning and alarm setpoints per parameter, with audible, visual, and data-log-triggered outputs
• In-field annotation capability: synchronized timestamped text notes, voice memos, annotated sketches, geotagged photos, and video clips—automatically embedded in raw data files
• Direct connectivity to digital cameras and borescopes for visual documentation of sampling locations and anomalies
• Built-in reference library: accessible calibration certificates, regulatory guidance excerpts (e.g., WHO IAQ guidelines, EPA NAAQS), sensor specifications, and instructional videos

Sample Compatibility & Compliance

The AS XM supports direct, plug-and-play interfacing with Graywolf-certified analog and digital probes—no firmware reflash or hardware modification required. All gas sensors undergo factory calibration traceable to NIST standards; particulate counters are verified against ISO 21501-4 reference aerosols. The system complies with electromagnetic compatibility (EMC) per IEC 61326-1 and safety requirements per IEC 61010-1. For regulated environments, WolfSense PC software supports audit-trail generation, user access control, and electronic signature functionality aligned with FDA 21 CFR Part 11 and EU Annex 11 expectations. Data integrity is preserved through cyclic redundancy check (CRC)-protected logging and write-once storage protocols.

Software & Data Management

WolfSense PC—a Windows-based desktop application—enables bidirectional synchronization with the AS XM host. It provides structured project organization, statistical analysis (mean, median, percentile, trendline fitting), customizable report templates (PDF, Excel, CSV), and dynamic charting (time-series overlays, scatter plots, heatmaps). Raw data files (.wlf format) retain full metadata: sensor IDs, calibration dates, GPS coordinates (when enabled), operator annotations, and environmental context. Export modules support automated ingestion into LIMS platforms via ODBC or REST API integrations. Firmware updates and probe configuration profiles are managed centrally through WolfSense Cloud—accessible only via authenticated enterprise accounts.

Applications

• Routine IAQ audits in office buildings, classrooms, and healthcare facilities per ASHRAE Standard 62.1
• Post-remediation verification following mold, VOC, or asbestos abatement projects
• Mobile source emission screening near bus depots, railway stations, and urban intersections
• Temporary monitoring networks during construction or renovation activities
• Baseline characterization for LEED IEQ credit documentation and WELL Building Standard v2 compliance
• Emergency response triage for chemical releases or indoor air contamination events
• Academic research on pollutant dispersion, ventilation efficiency, and occupant exposure modeling

FAQ

Can the AS XM operate autonomously for unattended long-term monitoring?
Yes—the host includes internal rechargeable Li-ion batteries (up to 12 h continuous operation) and supports external 12 V DC power input. With optional SD card logging and scheduled wake-up intervals, it can run for weeks without intervention.
Is WolfSense PC compatible with macOS or Linux operating systems?
No—WolfSense PC is a native Windows application (Windows 10/11, 64-bit). However, data export formats (CSV, Excel, PDF) ensure cross-platform interoperability.
How frequently must gas sensors be recalibrated?
Graywolf recommends zero/span verification before each use and full recalibration every 6–12 months, depending on exposure history and regulatory requirements. Sensor lifespan varies by chemistry (e.g., electrochemical cells: 24–36 months; PID lamps: 5,000+ hours).
Does the system support wireless telemetry or remote data transmission?
The AS XM host includes USB and Bluetooth 5.0 interfaces. Cellular or LoRaWAN telemetry requires third-party gateways; Graywolf does not provide built-in radio modules due to regional certification constraints.
Are calibration gases and span standards supplied with the system?
Calibration kits—including certified gas cylinders, flow regulators, and adapter fittings—are available as optional accessories. Traceable calibration certificates are provided with each kit.