EcoChem - PAS 2000CE - Brochure

CCoommppaacctt RReeaall--TTiimmee MMoonniittoorr ffoorr CCaarrbboonn AAeerroossoollss EEccooCChheemm PPAASS 22000000CCEE …shown actual size ? Detects ultrafine carbon aerosols in real-time ? Lightweight, compact and ruggedized construction ? Battery powered with onboard data storage ? Applications related to personal exposure in various environments (homes, workplace, automobiles, tunnels etc.) www.ecochem.biz Measuring Principle The PAS 2000 works on the following principles: ? Using an Excimer lamp the aerosol flow is exposed to UV radiation. The Excimer lamp offers a high intensity, narrowband source of UV radiation. The wavelength of the light is chosen such that only the carbon aerosols are ionized, while gas molecules and non-carbon aerosols remain neutral. ? The carbon aerosol particles emit electrons, which are subsequently removed when an electric field is applied. ? The remaining positively charged particles are collected on a filter inside an electrometer, where the charge is measured. The resulting electric current establishes a signal, which is proportional to the concentration of Elemental Carbon and/ or PAH. Also by operating the Excimer lamp in a chopped mode, the PAS 2000 can eliminate the background signal, which is associated with freshly generated aerosols. The chopped mode also enables a dynamic zero to be generated automatically by the instrument. Calibration Source-specific calibration curves are available or can be generated where the monitor output is compared to an analytically determined EC and PAH concentration. A site-specific calibration curve can provide greater accuracy for the particle size, charge and compound-specific to the source. In addition to the site-specific curves, an approximate universal calibration curve can be used for screening and real-time trending applications. Technical Specifications Display 16 characters with 2 lines LED Power 115 volts AC / 60 Hz & 220 volts AC / 50 HzMax. Battery 15 volts Lithium Metal Hydride Range 0 to 4000 ng / m3 Lower Threshold ~ 1 ng / m3 total particle-bound PAH Response time < 10 seconds (adjustable) Digital Output RS - 232 (for data download and program upload) Sample gas Built-in pump with flowrate controlled at 1 L/min Operating temp 40 to 104 ºF (5 to 40ºC) Dimensions Height x Width x Depth = 3in x 7in x 5in ( 68mm x 175mm x 124mm ) Weight 3 lb. ( 1.5 kg ) Data Storage Data Download 8000 Data Points (each data point consisting of : Time, Value ) User-friendly PC-compatible graphical software used for downloading the collected data. Flat ASCII file output can also be generated for further analysis (e.g. Microsoft Excel format). EcoChem Analytics Website: www.ecochem.biz Email: info@ecochem.biz 202 Reynolds Avenue, League City, TX 77573, USA Tel: 281-338-9888 Version 5.0 - Specifications subject to change without notice