20 Air Monitoring
VOC Detector Used by Leading Thai Indoor Air Quality Monitoring Specialist
When its existing photoionisation detectors (PIDs) proved ineffective in high humidity, indoor air quality monitoring specialist, Clean Air (Thailand) Company Ltd turned to Ion Science (UK) and its high performance Tiger instrument. The handheld detector is being used by the Bangkok-based business as part of its audit programme to measure potentially harmful total volatile organic compounds (TVOCs) in a wide range of buildings including offices, hospitals, hotels and residential properties.
Established since 2007, Clean Air Thailand designs and manufactures specialist Ozone and UVGI equipment to improve indoor air quality (IAQ). The company also offers an IAQ test service which helps building managers understand what is happening in their properties. The scientific information provided can then be used to introduce IAQ improvement programmes, often without the need for extra equipment.
Philip North, Director at Clean Air Thailand comments: “Even though a building’s IAQ might seem fine, it is essential that all the parameters which make up the air being breathed are regularly assessed. As part of our IAQaudit service, we measure TVOCs present within buildings but our previous monitoring instrument proved unreliable in Thailand’s humid conditions. We provide solutions to customers based on high levels of TVOCs being detected so needed a device we can completely trust when we show before and after readings.
“Following recommendation from another business, we chose the Ion Science Tiger VOC detector due to its revolutionary PID sensor technology offering excellent humidity resistance and anti-contamination design. As well as providing highly accurate readings, we were impressed with the system’s response time of just two seconds and opted for the data logging function for easy reporting.”
Providing market-leading accuracy and run time, the Tiger’s PID sensor capabilities utilise advanced patented Fence Electrode technology, a three-electrode format with increased resistance to humidity (up to 99% RH) and contamination. Combined with 24- hour battery life, these features maximise usage by minimising erroneous readings in high humidity and drift in harsh environments. The anti-contamination design also reduces calibration frequency.
Independently verified as the industry’s best performing PID for its speed of response, accuracy and linearity, the Tiger provided the most stable, repeatable readings when tested against competitor instruments in humid and contaminated environments.
The instrument’s well proven MiniPID is a simple plug and play sensor that has been specially developed by Ion Science to deliver a dynamic and reliable response to thousands of VOCs.
Designed for rapid detection, with an unrivalled response time of just two seconds, and the widest measurement range of one part per billion (ppb) to 20,000 parts per million (ppm)*, the robust Tiger is ready to use, straight out of the box, and extremely simple to set up. It offers worldwide Intrinsic Safety (IS) certification, making it suitable for use in potentially explosive, hazardous environments, and also meets ATEX, IECEx, UL and CSA standards.
Inexpensive disposable parts such as filters and lamps are easy to change, minimising downtime. Simple connectivity to a PC via the USB allows data to be downloaded quickly.
Philip adds: “The service from Ion Science’s UK operation has been very good. Most importantly, I would give the Tiger instrument top marks for reliability and accuracy. It has proved entirely fit for purpose and can easily cope with the Asia’s extreme humidity.”
*based on gases other than isobutylene
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Complete Solution for Tracking VOCs in Water and Air
Chromatotec (France) has developed a unique analyser for identification and measurement of volatile organic compounds both in air and water.
The airmoPurge extract VOCs from water in compliance with 502.2 method (US EPA: 60 compounds).
Associated with VOCs analysers, this complete solution offer capabilities to track VOCs in industrial or dirty water. It is convenient for a wide range of applications such as: dirty water, river water, rain water, finished drinking water, bottled water analysis and surface water in addition to ambient air.
No need to go and change the configuration, the system is able to change from liquid to gas without human intervention.
More specifically, the detection range varies from 0.5 to 20µg/L for surface water and for finished drinking water.
In order to be analysed, 5mL of water sample are inserted inside a sparger. Then, an inert gas (e.g. nitrogen is used to purge the sample and to send the gaseous compounds to the detector). Finally, the detector identifies and quantifies the compounds. The sampling time occurs during 11min and an automatic rinse is done after the measurement.
With airmoPurge analyser, it is now possible to detect contamination of river in case of industrials spills due to the rainwater falling; this may occur contamination due to hydrocarbons or VOCs presence.
Same solution can be designed with Sulphur analyser for individual sulphur quantification in water.
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New Online Humidity Calculator
With the online humidity calculator from E+E Elektronik (Austria), humidity-related parameters can be calculated quickly and easily. In contrast to other programs, it takes into account the measurement uncertainties. The E+E humidity calculator is now also available as a free app for mobile devices. The app for Android or iOS operating systems can be downloaded from the Google Play or Apple App Store. The app also features a pressure dew point calculator.
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Based on known ambient conditions, the E+E humidity calculator converts among all humidity-related parameters, such as relative humidity, dew point/frost point temperature, water vapour density, mixing ratio, partial water vapour pressure and specific enthalpy. Calculations can be made in metric (SI) as well as imperial (US) units.
Unique is that the E+E humidity calculator takes into account measurement uncertainties in the calculation. This means that realistic and reliable total uncertainties can be calculated based on the accuracy specification of the measuring device.
The app also features a pressure dew point calculator specifically tailored for compressed air applications.
Thanks to the intuitive operation the humidity calculator is very easy to use. The conversions and calculations can be saved or sent as a PDF. The online humidity calculator also offers the option of copying the results to an Excel file. The online version of the E+E Humidity Calculator is available in 8 languages, while the app is available in German and English.
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IET Annual Buyers’ Guide 2016/17
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