AerodyneResearch Technology Enhancing Science TILDAS Ethylene Oxide Analyzers Ultra-sensitive and highly specific real-time measurements of EtO at parts-per-trillion level in ambient air TILDAS TECHNOLOGY Aerodyne instruments use tunable infrared laser direct absorption spectroscopy (TILDAS) at mid-IR wavelengths to probe molecules at their strongest “fingerprint” transition frequencies. We further enhance sensitivity by employing a patented multi-pass broad-band absorption cell that provides optical path lengths up to 400 meters. Direct absorption spectroscopy allows for fast (<1 sec) absolute trace gas concentrations without need for elaborate calibration procedures. Moreover, TILDAS instruments are relatively free of measurement interference from other molecular species, enabling extremely specific detection. Applications - Process control - Fence-line monitoring - Community monitoring - Stationary and mobile applications Advantages - Real time EtO measurements - Fast time response (up to 0.1 s) - No sample preparation - No preconcentration - Best detection limit on the market* - < 75 ppt in 1 second - < 20 ppt in 100 seconds - < 10 ppt longer-term averaging with frequent auto-backgrounds on scrubbed air - Rugged, field-ready instruments - Direct absorption spectroscopy allows for highly specific and accurate gas detection - Mid-IR detection enables maximum measurement sensitivity - Time response up to 10 Hz enables eddy covariance studies - Spectroscopic accountability: fingerprint spectrum for unambiguous measurement - Powerful TDLWintel software provides flexible instrument control and real-time data analysis - Valve control capable of complex scheduling and automatic background and calibrations - 19" rack mountable for easy installation - Turn-key design allows unattended operation in remote field sites
An ultra-compact, field-deployable PTR-TOF-MS combined with online TD-GC for the in situ monitoring of volatile organic compounds (VOCs) Aerodyne Research offers an instrument package that combines recent innovations in online gas chromatography (GC) with an ultra compact PTR-TOF-MS resulting in a highly field-deployable system for in situ measurements of VOCs. The system automatically alternates between two acquisition modes on a user-defined interval: 1. direct high-time resolution detection by PTR-TOF-MS 2. isomer resolved detection by GC-PTR-TOF-MS The GC system, equipped with integrated thermal desorption (TD) preconcentration, offers pseudo-continuous molecular speciation for isomer-level resolution while maintaining parts-per-trillion (ppt) limits of detection across wide volatility and functionality ranges. Online gas chromatograph (GC) system with integrated thermal desorption (TD) preconcentration coupled with an ultra compact proton transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS) Compact GC-PTR Advantages - Field-deployable. Compact, robust design makes advanced, research-grade measurements possible in challenging and remote environments. - Fully automated switching between GC-PTR and direct-PTR measurements, providing automated acquisition of both online isomer-resolved data without sacrificing high time resolution detection. - Innovative VUV ionization cell provides exceptional sensitivity and stability, without humidity dependence. - GC thermal desorption preconcentration increases system sensitivity while the GC preseparation enhances compound resolution and aids interpretation of complex spectra. - Low detection limits: < 1 - 5 ppt (10 min) GC-PTR; 50 ppt (1 min) direct-PTR detection. - Low power (< 500 W, typical) and compact footprint (65 x 50 x 55 cm). - Fully automated analysis software provides real-time processing for a faster, more efficient data output.
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A field-deployable modular GC with thermal desorption pre-concentration for time-of-flight mass spectrometry with specialized software included for operation and data analysis. Aerodyne Research offers a modular gas chromatograph (GC) with thermal desorption preconcentration (TDPC) that combines recent innovations in fast GC separation with highly selective and sensitive detection in a field-deployable package for the measurement of VOCs and OVOCs. Aerodyne works with its customers to provide a GC system with a custom separation method appropriate for their analytical needs. The instrument delivers with the required capillary column installed and analytical methods pre-loaded into the Windows-based control software, for a true turn-key operation. Flexibility – up to three GC columns depending on application, pre-concentration methods (e.g. thermal desorption vs cryo-mechanical), detector type(s) Field deployable – ruggedized GC with small, light-weight footprint for automated operation Detector compatibility – true plug-and-play operation with all Aerodyne TOF-MS systems Dual detectors – designed to operate automatically with two detectors for a more complete data set Turn-Key – ready-to-run on delivery due to pre-installed analytical column(s) with custom pre-loaded method(s) Speed – flow path allows user to perform multiple GC operations at once; the benefit of this parallel operation is a faster GC cycle (10 – 30 min) without loss of performance. Analysis software included - Wavemetrics Igor Pro analysis software (TERN) allows for retention time correction, automated baseline and de-convoluted peak fitting for overlapping chromatographic peaks. Compatible for analysis of both high resolution (HR) and unit mass resolution (UMR) data.
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Fast, Accurate and Precise Continuous Measurement of Nitrogen Dioxide - Measurement of concentrations from pptv to 10 ppmv - High linearity (better than 1%) - Aquisition rate of 1 Hz - Direct measurement of NO 2; no chemical conversion required - Essentially interference-free - Automated and autonomous operation - Minimal maintenance (periodic change of filter and scrubber) - No toxic gas emissions - Customization available Measurement Specification: Ambient 0-3,000 ppbv; Fast Response (FR) 0-3,000 ppbv; Extended Range (EX) 0-10,000 ppbv Range (ppbv): Ambient 0-3,000; Fast Response (FR) 0-3,000; Extended Range (EX) 0-10,000 Resolution (ppbv): Ambient 0.01; Fast Response (FR) 0.01; Extended Range (EX) 0.01 Precision (2σ, 1 s) (ppbv): Ambient < 0.2; Fast Response (FR) < 0.5; Extended Range (EX) < 3 Time Response (10-90%): Ambient 7-8 s; Fast Response (FR) 1-2 s; Extended Range (EX) 1-2 s or 7-8 s Baseline Drift: Baselines Taken as Often as Required Span Drift: Negligible Linearity: < ± 5 ppbv at 1000 ppbv Flow Rate (lpm): Ambient 0.85; Fast Response (FR) 1.25; Extended Range (EX) 0.85 or 1.25 CAPS monitors are used worldwide in research laboratories and deployed in field campaigns at fixed sites, in mobile laboratories, and on ship and aircraft platforms. Automated and autonomous operation with minimal maintenance.
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Accurate and Precise Continuous Monitoring of Cloud Properties: Optical Depth, Effective Radius, Phase - Measures VIS spectra (400-1700 nm) - Provides 1 Hz sample rate - Resolves thick/thin cloud ambiguity - High Temporal Resolution; Typical SNR (530 nm) 1000 at 1 Hz - Proven radiometric stability under harsh field conditions; frequent recalibration not required - Sealed IP65, IP66, IP67, IP68 enclosure - Includes radiometric calibration and a laptop computer fully loaded with executable software for control, data processing and user calibration - Demonstrated agreement with co-located AERONET sensors within 1% when comparing in-band solar radiance at 440 and 870 nm TWST Measurement Specification CPS Sensor Spectral Range 400-1000 nm / 950-1700 nm Spectral Resolution ~2 nm / ~6 nm Field of View.5 deg. FWHM Spectral Bands used in COD Retrieval 440, 760, and 870 or 780 nm COD Precision 1% (typical, depends on update rate) Operating Range Clear sky to COD 100 Data Logging Rate 1 Hz (typical), variable sampling internal from 1 to 60 seconds Method for Phase Retrieval 1600 nm spectral band Phase Designations Ice, Mixed, Liquid Method for R eff Retrieval Minimization of error between spectral radiance measurements and forward model
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