16 Air Monitoring NDIR multi-gas sensors provide cost eff ective precision


for a multitude of environmental monitoring applications The m-u-t multi-gas sensor measures the concentrations of up to eight optically active gases using non-dispersive infrared spectroscopy (NDIR) technology. Operators can also integrate up to six other sensors with different measuring principles, such as electrochemical, as well as temperature and relative humidity sensors. These versatile and precise multi-gas sensors have been developed for use as OEM components for integration into online analysis systems, for applications such as process control, for permanent installation and are made for use in monitoring applications. The infrared multi-gas sensor


has a non-extractive sample feed; the gas sample is transferred into the measuring chamber thanks to a difference in pressure conveying the sample.


These sensors use a broad-band IR emitter and a proprietary nine-channel detector with bandpass fi lters of specifi c wavelengths depending on the type of gas to be analysed. It measures light absorption as it crosses the sample chamber to provide a precise reading of gas concentration. There are no chemical reactions, therefore these multi gas sensors have a long service life and provide long term stability.


The sensors are pre-calibrated and compensated for cross-sensitivities according to the customers’ gas matrices. They are CE certifi ed and housed in a IP20 rated housing. m-u-t’s versatile sensors provide OEMs with a versatile, precise and long-lasting device that can monitor a host of environmental pollutants with rest-assured accuracy ensuring that end-users comply with environmental regulations and safeguard the safety of their personnel, assets and the local community.


Rented gas analyser safeguards packaging


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Feedback from the project indicated that the Signal analyser proved to be accurate and reliable, and provided the packaging manufacturer with a problem-free transition as it updated its monitoring regime. However, there was a delay in the work, and the rental of the Signal analyser was extended for several months.


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The plant’s VOC emissions arise from printing and laminating processes, and are treated by an oxidiser, after which an FID analyser measures the total organic hydrocarbon content post-oxidation. By monitoring the emissions continuously, the plant’s operators are able to refi ne their processes to improve effi ciency, and to minimise emissions.


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The hired Signal equipment included a heated FID analyser, a heated line with controller, and a fi lter. “We manufacture all of these items, whihc means that the complete system is delivered ready-to-go, so that clients can be assured of compatibility, accuracy and reliability,” explains Signal MD, James Clements. We have hundreds of these systems in operation all over the world, so our staff are highly skilled and experienced in delivering support.


“As the world strives to meet the COP28 goals, manufacturers are looking to reduce their carbon footprint, as well as the carbon footprint of their supply chains. Lowering VOC emissions is one of the ways in which companies can help achieve these critically important objectives.”


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Analysis of hydrogen fl uoride in the range of 0-3mg/m3


added to stable of precision air emission monitoring instrumentation


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Protea Ltd based in the UK with two states of the art manufacturing units. Protea designs, manufactures, and supports a comprehensive range of advanced Continuous Emission Monitoring & Process analysers and systems. Protea’s technologies include Fourier-Transform Infrared, In-Situ IR and Extractive Photometers, In-Situ UV and Extractive Spectrophotometers, TDL, Mass Spectrometers, FID Analyser. In addition to manufacturing analysers Protea have developed a modular CEMS / AMS solution comprising of all the necessary elements to monitor and report in compliance with the Industrial Emissions Directive (IED). To complement Protea’s range of gas blenders, the portable atmosFieldCal capable of humidifying certifi ed test gas and calibration solutions has been developed.


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Protea has recently announced that a Hydrogen Fluoride (HF) range of 0-3mg/m3


has been added to their atmosFIR EN14181 QAL 1 MCERTS


Certifi cate. HF is a highly reactive gas and is seriously damaging to human health, consequently it has strict emission limits imposed by legislation. Protea has advanced the standard method of HF measurement by providing a continuous, process specifi c measurement using an FTIR. Protea’s FTIR systems offer a high-resolution measurement, meaning that the spectrum of HF that is measured is clearly identifi able and of increased absorption, enabling lower detection limits (LDLs) for HF to be achieved.


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manufacturer’s environmental performance A global packaging company is monitoring VOC emissions (volatile organic compounds) continuously at its facility in Ireland - primarily to manage and improve the plant’s environmental performance and to demonstrate regulatory compliance. Due to a changeover in equipment, a short-term requirement arose for VOC monitoring with a fl ame ionisation detector (FID) that was hired from Signal Group in the UK.


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urban air monitoring technology A continuous ambient air quality monitoring system (CAAQMS) will monitor the air quality of a city on a real-time basis. It will continuously measure air pollutants throughout the year in a consistent manner. The air pollutants measured are as follows: SO2


, NO, NO2 , NH3 , CO, O3 , CO3 , VOC, PM10 , and PM2.5 . Then again, CAAQMS


is the high-level variant of the AAQMS air quality monitor system. It utilises very high-quality innovations like the Internet of Things for computerised information assortment and its exchange and investigation at the focal server. The information moved to the waiter progressively, and its stretch is fl exible between 2 and 30 minutes. In the middle, the information is naturally investigated with cutting-edge computer-based intelligence and chronicled or utilised likewise.


Vasthi Engineers Pvt Ltd provide a highly sophisticated range of CAAQMS analysers. Their Vair-9009 is a precise and dependable instrument for measuring particulate matter in air (PM10


provides accuracy of ±1% for <100 µg/m3 <1000µg/m ±10%for<10000µg/m3


) – this low maintenance device ±2% for <500 µg/m3


±5% for , with excellent repeatability of <±3%. It can operate in temperatures ranging from 0 - 40°C and humidity of 0 – 90%.


Vasthi Engineers’ Million Plus Cities Urban Air Quality analyser offers speed and precision for analysing levels of SO2


, NO2 and PM2.5 , Ozone, CO, benzene, particulates to PM10 to a resolution of 1 ppm. This rugged and reliable device is the ideal tool


for understanding air pollution levels in urban conglomerations and can be solar powered, with 4 hours back-up battery life if necessary.


For those requiring measurements of specifi c parameters, the Vair-9001 measures sulphur dioxide (SO2


) in ambient air providing operators with a precision


within 1% of the reading, or 1 ppb and operating in temperature ranging from 5 - 40°C, this highly advanced analyser operates by utilising ultraviolet fl uorescence technology (UVF). The Vair-9002 measures ozone (O3


) in ambient air using UV


photometry; it provides end users with a highly precise analyser (0.5% of reading or 1ppb) in operating temperatures of 5 - 40°C. The Vair-9003 precisely measure carbon monoxide (CO) levels in air (1% of reading or 0.1 ppm) also in temperatures ranging from 5 - 40°C using non-dispersive infrared analysis (GFC NDIR). All these instruments provide rest-assured accuracy and dependability and have achieved certifi cation from various international agencies including the USEPA.


The Viar 3000 Series Particulate Monitor measures airborne particulates to PM10


or PM2.5


- +55°C it offers a measuring range of 0-5mg/m3 scattering measurement technology.


or TSP. Operating at an extensive temperature range of -20 to 30mg/m3


using laser


Vasthi Engineers also offer an ultrasonic weather monitoring station to enable end users to factor in meteorological factors when appraising urban air quality. With a wind speed range of 0.5 to 99.5 knots (1 to 185 kph) and resolution of 0.1 knot (0.19 kph) – this device provides the crucial weather data necessary to comprehend the levels of airborne pollutants.


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