48 Air Monitoring A checklist for buying small sensor air quality systems
If you are considering - or are at the point of buying - a system for local monitoring of air pollution, we have used our decade of experience to offer lists of points to consider. Why more than one list? The critical issues around air quality monitoring vary depending on your project, so we have prioritised points for a range of applications. We hope we have included yours, but please contact us if we can help further.
Government and local authorities Budgets are the killer, so lifetime cost needs to be low and predictable, as well as having a competitive initial purchase price. In our experience, local authorities often run equipment year after year, so upgrades and other re-specifi cation options are very budget-friendly if priorities change: why buy again if your system can evolve with your needs? Another great way to help the budget go further is to look at fi xed price, all-inclusive rental options, particularly if there is the fl exibility to roll on after the initial term with a rental or buy the equipment through a fi nal top-up payment. Once the equipment is in place, it needs to be maintained – critically including data quality management – without demanding scarce fi eld resources or incurring call-out charges. But at the end of the day it is vital to have traceable data, so ask about how that can be achieved.
Industrial fence line If you need to know about pollutant exceedances on and around your site, you need them 24/7/365, or maybe even 60/24/7/365, so reliability and data up-time are critical. There are many things to look out for which can reduce reliability, including poor product design for the conditions, poor manufacturing quality, poor data connections and often lack of a reliable power supply. Ideally power supply and comms infrastructure are autonomous and it’s hard to beat the combination of a clever solar charging system that’s tuned to your latitude and access to the mobile phone network that dominates in your area.
With many industrial sites located potentially hundreds of miles away from the air data management team, the ability to remotely diagnose problems – and fi x them – is vital, if data is not to be lost. And what information is needed? Real-time measurements at different locations, particularly combined with wind speed and direction information, provide valuable insights about pollution sources, and often a reliable exceedance alert is what is required on an ongoing basis. Of course, any sensitive information about air pollution around a facility must be kept completely confi dential and accuracy will need to be demonstrated through traceability to an approved standard.
Research and consultancies A wide range of measurements and confi guration fl exibility are helpful, as are short and long-term rental options. Critically, data must be secure and private, quality assured and proven to be accurate and repeatable.
Transportation From a train carriage to an airport runway, road junction or port facility, installation must be easy for the local team, with minimal maintenance: no unexpected calls for contractors to carry out work, taking time and costing money. Air quality measurements must be continuous, with no down time, if patterns and brief episodes of high pollution are to be recorded.
Construction
Measurements – usually dust – are being taken for a reason, so the measurement system must comply with the specifi ed standard, eg: MCERTS. Once that box is ticked, it is essential that readings are recorded continuously and reliably. Particulate matter can cause various frustrations, including potential over-readings due to moisture, so it’s important that the system has been designed to provide reliable readings which are fi t for purpose. We have seen some astonishing things happen to equipment on construction sites, so choose a system that can handle itself: its own power supply, communications, and ability to cope with a few knocks, vibration, dust and mitigation systems. Measurements must be reliable – and regularly proven against a standard – and delivered in a way that works for site management, such as meaningful alerts (without false alarms).
For more detailed information on all the consideration points specifi c to your application, get in touch for a free information pack full of valuable advice based on over 10 years’ real-world experience in the fi eld.
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Dependable, low maintenance and
cost-eff ective CO2 analyser measures carbon dioxide in natural gas pipelines, biogas plants and landfi lls
As companies take measures to become more environmentally friendly, they must be aware of their carbon footprint that impacts global warming. KECO offers the CarbonHound CO2
Gas Analyser as
an accurate, cost-effective, and low- maintenance method to detect and measure carbon dioxide (CO2
) in natural gas
pipelines, biogas plants, and landfi lls. The online process analyser is ideal for use in chemical and biogas plants, gas processing facilities and landfi ll industries that need an accurate, dependable, and cost-effective CO2
microprocessor-based analyser as part of quality and process controls.
KECO’s CarbonHound CO2 Gas Analyser
continuously quantifi es the amount of carbon dioxide in sample streams in real- time using a non-dispersive infrared (NDIR) method of measurement. Once introduced with a sample, the infrared detection element provides an output proportional to the concentration of carbon dioxide. The signal is digitized as a 4-20 mA output, relay alarms, RS-485, or TCP/IP Ethernet to work in different process control systems.
The CarbonHound features a large colour touch screen HMI with LCD display that provides the current reading, previous reading, alarm conditions, historical and real-time charts, procedure prompts, and failure indicators. Built for use in Division 2 and Zone 2 hazardous locations, the CO2
gas
analyser is available in an outdoor weathering packaging. Wetted parts are nonreactive when contacting the process stream.
Featuring a solid-state design, the CarbonHound On-line Process Analyzer is low maintenance, requiring calibration only once a month or less. In addition to an optional H2
S scrubber and fugitive emission
control unit for vent, the process analyser is confi gurable with a sample system for LPG, LNG or gases entrained with light liquids.
With accuracy and repeatability of +3% of full scale and resolution of 0.01% for readings up to 10% volume, the CarbonHound is the most effective way to measure carbon dioxide in natural gas pipelines, biogas plants and landfi lls.
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IET ANNUAL BUYERS’ GUIDE 2023/24
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