PureSniff XL Olfactometry System by Olfasense

Overview

The PureSniff XL Olfactometry System is a high-precision, laboratory-grade dynamic dilution olfactometer engineered for standardized, human-based sensory evaluation of undiluted gaseous odorants. Unlike instrumental gas analyzers, this system operates on the fundamental principle of human olfactory perception—leveraging trained panelists to quantify odor intensity (in odor concentration units, ou_E/m³) and hedonic tone (pleasantness/unpleasantness) under strictly controlled exposure conditions. Designed in accordance with EN 13725:2022 “Air quality — Determination of odour concentration by dynamic olfactometry” and aligned with ASTM D6919-23 “Standard Practice for Odor Measurement by Dynamic Olfactometry”, the PureSniff XL enables reproducible, auditable, and legally defensible odor assessments required for environmental compliance, landfill monitoring, wastewater treatment plant reporting, and industrial emission characterization.

Key Features

• True undiluted sample presentation mode: Enables direct assessment of native odor samples without pre-dilution—critical for detecting low-threshold, highly potent compounds that may be masked or altered during dilution.
• Dynamic dilution architecture with precision mass flow controllers (MFCs): Delivers stable, traceable dilution ratios from 1:1 (neat) up to 1:100,000, calibrated per ISO/IEC 17025-accredited procedures.
• Modular, laminar-flow olfactometer manifold: Ensures consistent residence time, minimal wall adsorption, and cross-contamination-free stimulus delivery to each sniff port.
• Integrated real-time environmental monitoring: Measures and logs ambient temperature, relative humidity, and barometric pressure at the sniffing station to support data normalization per EN 13725 Annex C.
• Touchscreen operator interface with audit-trail-enabled firmware: Supports user authentication, session timestamping, and immutable event logging compliant with GLP and FDA 21 CFR Part 11 requirements for regulated environments.
• CE-marked design with ESD-safe construction: Meets IEC 61000-6-3 (EMC) and IEC 61000-6-2 (immunity) standards for deployment in analytical laboratories and field-deployable mobile labs.

Sample Compatibility & Compliance

The PureSniff XL accommodates gaseous samples delivered via Tedlar® bags, stainless-steel canisters, or direct line sampling from emission stacks, biofilters, or ambient air intakes. It supports both continuous and discrete sampling protocols and is validated for use with volatile organic compounds (VOCs), sulfur-containing species (e.g., H₂S, mercaptans), nitrogenous amines, and short-chain fatty acids—compounds commonly associated with nuisance odor complaints. All operational parameters—including flow rates, dilution steps, presentation duration (1–5 s), and inter-stimulus intervals (≥45 s)—are programmable to conform with EN 13725 mandatory procedural constraints. The system’s calibration traceability extends to national metrology institutes (e.g., PTB Germany), ensuring measurement uncertainty budgets meet ≤±15% (k=2) for odor concentration determinations.

Software & Data Management

Olfasense OlfactoSoft v5.2, included with the PureSniff XL, provides full lifecycle management of olfactometric testing: panelist qualification tracking, forced-choice triangular test administration, automatic calculation of odor thresholds (OTU) and odor concentration (ou_E/m³), and statistical validation per ISO 8586 (sensory analysis — general guidance for the selection, training and monitoring of assessors). Raw data files are stored in encrypted SQLite format with SHA-256 hash integrity verification. Export options include PDF reports compliant with municipal regulatory submission templates (e.g., VDI 3882, TA Luft Annex 4), CSV for third-party statistical analysis (R, Python), and XML for LIMS integration. Audit trails record every parameter change, result entry, and user action—retained for ≥10 years as required under EU Regulation (EC) No 1272/2008 (CLP) and U.S. EPA Method TO-15A documentation guidelines.

Applications

• Regulatory odor impact assessments for permitting and compliance reporting (e.g., EPA Title V, EU Industrial Emissions Directive)
• Source identification and ranking in multi-emitter facilities using comparative olfactometric profiling
• Performance validation of odor abatement technologies (e.g., activated carbon filters, biofilters, thermal oxidizers)
• Research into odorant structure-activity relationships (SAR) and receptor-level response modeling
• Community complaint investigation with legally admissible sensory evidence generation
• Development and verification of electronic nose correlation models using human-panel-ground-truth datasets

FAQ

Is the PureSniff XL suitable for field use?
Yes—the system is designed for both fixed-lab and mobile deployment; optional battery backup and ruggedized transport cases enable operation in ambient temperatures from 5 °C to 35 °C with <80% RH non-condensing.
How many panelists can be tested simultaneously?
The PureSniff XL supports up to six independent sniff ports, each with dedicated flow control and stimulus timing—enabling parallel testing of six trained assessors per session.
Does it support automated threshold determination?
Yes—via adaptive staircase protocols (e.g., ASTM E679) integrated into OlfactoSoft, with real-time convergence analysis and ISO 11132-compliant confidence interval estimation.
What maintenance is required?
Quarterly MFC recalibration using certified NIST-traceable gases and annual full-system verification against reference odorants (n-butanol, hydrogen sulfide) per EN 13725 Clause 7.3.
Can it interface with existing LIMS or SCADA systems?
Yes—via OPC UA and RESTful API endpoints; custom middleware development is supported under Olfasense’s ISO 9001-certified engineering services program.