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Air Monitoring


Innovative Gas Sampling Solution Deals with Ammonium Bisulphate and Other Condensing Salts


M&C(Germany) has developed a special sampling technique for continuous measurement of flue gas from DENOX (SCR) plants where NH3 and SO2 /SO3 or Urea is added to reduce NOx in the flue gas. This salification blocks up filters and sample lines in a short time. .


This new sampling technique has also proved beneficial for other processes with problematic salt formation, e.g. glass production and FCC on refineries. With temperatures of


The special M&C gas sample probe SP2000-H320/S offers a good solution. In order to prevent blockage due to salification, the probe temperature is controlled above 300°C, keeping the salts in the vapour phase. At the outlet of the probe filter, the gas passes into a glass separator vessel filled with glass balls to extend the surface for salt formation. Inherent moisture and solubility of salts means the resulting solution can be easily pumped away, providing a self-cleaning mechanism. A range of accessories complement this probe including different probe tube materials, calibration gas management, blow-back and external temperature control.


Reader Reply Card no 122 New Particulate Sampling Unit Launched


Environmental monitoring equipment manufacturer Casella Monitor (UK) has added a new product to its wide ranging portfolio of product and service solutions by launching a new, low entry price, 18 filter-exchange, gravimetric particulate sampling unit, the Gravisol Sequential Ambient Particulate Monitor.


The device, unveiled for the first time at the recent Mcerts 09 Air and Emission Monitoring conference and exhibition in the UK, is capable of handling high volumes and has an automatic pneumatic filter changeover mechanism which allows up to 18 gravimetric samples to be taken sequentially.


The Gravisol is driven by a single motor and is capable of three-dimensional movement, removing the risk of


internal temperature fluctuations. The device allows sampling for both particulate matter PM10 (soot and dust) and PM2.5 (finer particles) and includes temperature and pressure sensor attachments. With its high quality pump it requires little attention, thus making this unit reliable and simple to maintain.


The Gravisol has a touch screen interface and a 2GB CF memory card capacity, and as well as a web-based remote control facility option. It is ideal for use on construction or demolition sites, for indicative boundary monitoring, air quality assessments, ambient air quality studies, traffic monitoring, and in air quality management areas.


Phil Bradley, Casella Monitor’s Technical Services Manager, commented that Environment Agency representatives who saw the Gravisol at the exhibition said that they liked the fact that it maintains a stable internal temperature, allowing samples to retain their VOC content for further speciation, conserving valuable data that might otherwise be lost.


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Reader Reply Card no Compact Rugged Weather Station


Delta-T Devices (UK) have introduced a new high quality weather station that is exceptionally easy to set up and operate. The WS-GP1 is delivered pre-wired with a set of carefully matched high grade sensors including rain, solar radiation, wind speed, wind direction, relative humidity and air temperature. The WS-GP1 is supplied in two suitcase-style carry cases that can be used to store or transport the system. The cases are easy to stow in a vehicle and are light enough for one person to carry on site. The sensors and logger are supplied pre-wired and pre-programmed, making it an easy task to assemble the system, even in difficult environments. The well illustrated Quick Start Guide leads the user through the simple process of installation, set-up and data collection.


Despite the low system cost, the sensors are dependable and suitable for use in demanding environments. The galvanised steel tripod and white painted stainless steel cross-arm ensure excellent physical strength. A simple 2m pole is available as an alternative for mounting in concrete, or the cross-arm can be ordered separately for fitting onto the customer’s own mast (42-52 mm diameter). The internal battery provides 6 month’s operation (typical for alkaline, much longer with optional lithium battery).


Recorded weather data can be collected directly with a notebook PC, remotely by optional GSM modem, or using a Pocket PC pda with the optional Pocket DeltaLINK Software to collect and view the data, or reconfigure the logging set-up in the field. The WS-GP1 records are easy to access and, as well as standard options, include the ability to log and display: wind rose, gusts, averages (including direction and vector average), maximum and minimum readings with times of occurrence.


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Reader Reply Card no 126


Reader Reply Card no 124


New U.S. EPA Lead Standard to 0.15 µg/m3


In October 2008, the U.S. EPA tightened its National Ambient Air Quality Standards (NAAQS) for lead (Pb) from 1.5 µg/m3


, measured as total suspended particulates (TSP). This change has meant a 10 fold decrease in acceptable lead levels and thus, the accuracy of monitoring equipment is even more important.


Ecotech Pty (Australia) meets this stringent new monitoring requirement with their U.S. EPA approved HiVol 3000 (RFPS-0706-162) and also with their latest product, the MegaVol 3000.


In order to accurately monitor these new low levels of lead, the HiVol 3000 air sampler is fitted with accurate volumetric flow control including inputs from local conditions, i.e. local air temperature & pressure. The exhaust from the HiVol 3000 is also directed away from the sampling point by at least 4m to ensure no recirculation of sample air.


The MegaVol 3000 sampler, designed for the European air monitoring community, uses a flow rate of 150 m3 /hr


and has been designed to obtain low concentration (trace) detection limits for a number of target compounds and elements including: Lead and all types of heavy metals; Radioactive particles; Organochlorine pesticides; Polychlorinated Biphenyls (PCB); Polynuclear Aromatic Hydrocarbons (PAH); Dioxins/Furans.


Reader Reply Card no 125 Reader Reply Card no 127


Annual Buyers Guide 2009


IET


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