Health & Safety New CO2 Analyser is Fast, Easy to Use and Very Accurate
Reliance on accurate indoor air quality (IAQ) monitoring is greater than ever for environmental site surveys on homes, offices and factories especially near potentially polluting sources like landfills. Border control and port inspectors may use carbon dioxide analysers with probes to discover stowaways and illegal immigrants in lorries and containers. Food packers with modified air packaging (MAP) and growers with controlled environments in e.g., glasshouses or for mushroom farming all seek accurate, reliable gas analysis.
Geotech’s (UK) new G150 carbon dioxide (CO2) analyser has the accuracy essential for IAQ measurements in very low CO2 concentrations of 0-10,000ppm. This level of accuracy is vitally important when checking, for example, sick building syndrome. Newly designed and engineered, the G150 has options for
oxygen (O2), temperature, humidity and PC/Internet hook up. Checking IAQ CO2 levels is simple. Users just switch on the G150 and view the crystal-clear screen. With backlight on its easy-to-read screen, the Geotech G150 is a replacement the earlier Geotech CD98 analyser. Geotech has developed the G150 from 30-years of experience and customer-focused research.
At the heart of the new G150, designed and built by Geotech in the UK is a custom, Geotech-designed, CO2 analysis cell. Geotech’s new infrared absorption cell has increased length for low-levels CO2 to give maximum sensitivity and accuracy. The G150 is specifically designed for 0-10,000ppm, (0.0-1.0 %). This accuracy is essential as IAQ tests measure very small concentrations of CO2. In normal fresh air CO2 ranges between 380-420ppm (0.038-0.042%) while concerns with sick building syndrome (SBS) start with CO2 as low as 500ppm (0.05%).
Options include oxygen (O2) analysis using a factory-fitted electrochemical cell with a service replacement life of three years in air. An optional probe measures humidity and temperature. The probe, with a carry-case assists, environmental site surveyors as they move between locations. The G150-11N measures CO2, O2 humidity and temperature.
The on-board electronics and microcontroller in the G150 use the latest proven available technology which has increased data storage, ease-of-use, longer life and PC/Internet connectivity. The on-board rechargeable battery lasts for more than 12 hours. Moisture removal is built in which aids reading stability and accuracy.
Also new with the G150 is the option of a unique ID for each location against which the G150 stores a set of readings of date, time, CO2, O2, temperature and humidity. In total the G150 stores 1000 data sets. These can be screen-viewed or, via PC-USB cable, downloaded to Geotech’s optional Analyser Data Manager Software. With this, users can also download
calibration events and an analyser’s set-up profiles to copy to another G150 readied for immediate use. PC connectivity also provides Internet access for remote, down-the-line diagnostics and firmware updates.
Reader Reply Card no 76 Monitoring CH4 CO and Airflow in Mine
The STX3241 and STX3261 toxic and flammable gas detectors and TX5920 Vortex Air Flow Sensors from Trolex ((UK) have been used to monitor CH4, CO and air flow at the Svea Nord mine in Norway.
The sensors have a high strength moulded housing sealed against dust and moisture to IP65 standard and EMC protection, making the systems resilient in the extreme, arduous conditions in the mine. All the sensors have ATEX M1 approval, a legal requirement which identifies equipment that continues to operate when a potentially explosive atmosphere is present.
Tor-Arne Iversen, Electrical Engineer at Store Norske commented, “Trolex gas sensing systems have been used in the mine since it opened in 2000 and are also used in JOY Machinery and in Sandvik Machinery. We are extremely happy with the service and equipment that we have received from Trolex which is the only gas sensing equipment that we use to have ATEX M1 approval.”
The STX3261 flammable gas sensor is a robust, dust and waterproof pre-calibrated gas detector which utilises a poison resistant catalytic combustion sensor to monitor flammable gases present in the atmosphere such as methane and propane. The large mass of the sensing element assures a long and reliable operating life with exceptional stability even in conditions of high vibration.
The sensor has a life expectancy of approximately five years depending on the monitoring conditions and can be rapidly serviced or replaced at the end of its operating life. It is also available with a remote mounted gas-sensing module for installations where space or access is restricted.
The STX3241 toxic gas sensor is designed for ease of installation and maintenance
in arduous, exposed locations providing economical safety protection from toxic gases such as carbon monoxide, hydrogen sulphide, nitrogen dioxide, nitric oxide and sulphur dioxide in mining and tunnelling applications.
The sensor features high accuracy electrochemical cell gas sensing elements, convenient and secure zero and span calibration and a choice of output signals of 4Ö20mA or 0.4Ö2V.
Reader Reply Card no 77
Intrinsically Safe Industrial PCs for Operator Control and Monitoring in Hazardous Areas
Siemens (Germany) is extending its rugged industrial PCs with two intrinsically safe HMI (Human Machine Interface) devices for Ex zone 1/21 and 2/22 hazardous areas. The resilient and completely maintenance-free Simatic HMI Panel PC Ex can be flexibly configured and is suitable for use directly on the machine or outdoors at ambient temperatures from minus 20 to plus 50o
C. The panel PC is particularly suitable for operator control and
monitoring, measuring and testing as well as data collection and communication. Simatic HMI Thin Client Ex was designed for operation and monitoring as a flexible remote HMI station, for example as a thin client in a remote terminal environment. Both units are suitable for use in the presence of ignitable gases, vapors and air/dust mixtures, for example in the manufacture of gasoline, pharmaceuticals and cement or the processing of flour and cereals. Simatic HMI IPC3077 Ex is the first panel PC from Siemens for hazardous areas.
Reader Reply Card no 78 Reader Reply Card no 79
CO2 %RH VOCs Particulate ˚C ∆P
Airflow CO O3 and more
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DirectSense®
Measure Smart
Worldwide Service; Contact us for your local Asian distributor
Optional WolfPack™ Modular Area Monitor
mobile PC based meter Report Efficiently
April/May 2010
AET
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