38 GAS DETECTION
Well-proven, handheld gas detection instrument monitors potentially harmful volatile organic compounds in soils
Geo-environmental consultancy, IGE Consulting, is using a TigerLT handheld photoionisation detector (PID) from Ion Science to provide comprehensive risk assessments of on-site contamination. Supplied by UK-based distributor, Shawcity, the instrument was chosen for its flexible lamp design options that target different ranges and types of gases, and is monitoring potentially dangerous volatile organic compounds (VOCs) in soils which may cause harm to human health or compromise safety.
Manchester-based IGE Consulting undertakes desk studies and intrusive site investigation works on sites to be developed into residential or commercial developments. The company operates across the UK and provides a tailored service to meet client requirements such as pre-acquisition / planning development, abnormal costing evaluations, site investigation works and construction efficiency savings.
Molly Brown, Geo-environmental Engineer at IGE Consulting comments: “We previously hired the Ion Science TigerLT for monitoring VOCs in soils so have used it numerous times with great success. To save costs in the long term, it made sense to purchase one of the instruments. It also adds value to our site investigations and reports as we are able to provide a more comprehensive risk assessment.”
Molly continues: “One of the most appealing features of the TigerLT for us is the different options for lamps which allow various VOC gases to be detected. For example, we can choose lamps that give us a wide range or target specific ranges if we need to look for a particular type of VOC gas.”
Ion Science’s TigerLT, which offers worldwide Intrinsic Safety (IS) certification for use in potentially explosive atmospheres, is a streamlined, low-cost version of Ion Science’s well proven Tiger PID model.
Like all Ion Science PID instruments, the TigerLT incorporates the company’s market-leading PID technology with advanced patented fence electrode system. This three-electrode format ensures increased resistance to humidity and contamination for ultimate reliability and accuracy in the field.
With a detection range of 0.1 - 5,000 ppm utilising a standard two-point calibration protocol, Ion Science’s robust TigerLTalso offers an unrivalled industry response time of just two seconds and equally quick clear down.
Both simple to operate and service, the TigerLT offers easy access to the lamp and sensor with batteries that can be safely replaced in hazardous environments. The intrinsically safe instrument also meets ATEX, IECEx, North American and Canadian standards.
Molly continues: “The TigerLT instrument is working well and enables us to provide a more comprehensive risk assessment of on- site contamination and the associated human health risk.
“In fact, the TigerLT PID instrument has already reduced costs for one of our clients by locating a VOC hotspot and proving blanks elsewhere on site meaning they did not have to install a VOC barrier on proposed plots. This client now only has to install VOC barriers on four out of 54 locations.”
The key advantage of TigerLT over other similar, low-cost handheld PID instruments is its market-leading accuracy and run time due to its anti-contamination and humidity-resistant design. Another attribute is its global Intrinsic Safety certification. Although the accreditation process can differ from country to country, the TigerLT can be used in explosive hazardous areas such as within petrochemical plants that are located anywhere in the world.
The TigerLT six pin MiniPID detector cell with anti-contamination design dramatically extends run time in the field. Low cost filters and lamps can be easily changed in minutes, minimising downtime.
It features long life rechargeable Li-ion batteries which give up to 24 hours usage. Fast battery charging allows the instrument to be fully charged in 6.5 hours, while eight hours of use can be achieved from 1.5 hours of charging time.
TigerLT features a protective, removable boot for harsh environments while a large, clear back-lit display allows for easy viewing in any light condition. It is IP65 rated against water ingress. An integrated torch is designed for directing the instrument’s probe into dimly lit areas. Other features include a loud 95 dB audible alarm and multiple language support.
Ready to use, straight out of the box, the TigerLT does not require complicated set-up procedures via a PC to perform basic functions. “The Tiger LT is performing well and as expected from our previous experience. The service provided by Shawcity was good with fast delivery. Overall, we are very happy and would recommend the instrument to other environmental and geotechnical consultancies,” Molly concludes.
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WirelessHART gas leak detector adds sensors for ammonia and hydrocarbons United Electric
Controls has added ammonia and hydrocarbons sensors to its Vanguard WirelessHART Gas Detector. Wireless gas detection reduces compliance costs and improves safety by eliminating the need for wiring and terminations, reducing installation costs by as much as 80 percent and enabling greater coverage density. United Electric Controls WirelessHART gas leak detectors reduce costs and improve safety further
because they can run on a single battery for five or more years.
“By adding ammonia and additional hydrocarbons to our popular Vanguard line, we extend the benefits of our WirelessHART solution to provide more flexibility for improving plant safety and complying with emissions regulations. Detection of toxic and combustible gases is critical to both plant safety and emissions monitoring. Wireless technology makes it much more affordable to install gas detectors in areas of the plant that are hard to reach or where running new power or communication wires is cost-prohibitive,” said Chris Frail, Vanguard product manager.
Ammonia leak detection is critical in chemical plants that produce or store it for use in their processes. A good example is temporary storage tanks, which must be monitored for the presence of fugitive vapours constantly, but for which wiring communications and power can be costly and labor-intensive. Wireless detectors make it easy and affordable to deploy or redeploy sensors where and when they are needed.
Ammonia gas leaks in food and beverage plants and other settings where refrigeration is in use are increasingly common as international regulations drive ammonia to replace fluorocarbon refrigerants. Ammonia is popular for this because it is readily available, has low Global Warming Potential (GWP) and Ozone Depletion (ODP) values and is a generally cost-effective solution, but it is also both toxic and combustible, which requires real-time monitoring.
In the power industry, ammonia is used to reduce nitrogen oxide (NO) — the chemical that creates smog and acid rain (NOx) -- in flue gas in coal-plants before it enters the atmosphere. Leaks are possible during operation or in storage areas.
Cost-effective leakage of non-methane hydrocarbon gases (NMHCs) such as butane (CH4H10), pentane (C5H12), and propane (C3H8) are also increasingly necessary for plant safety and regulatory compliance.
In the power industry, for example, remote locations are increasingly moving to liquefied propane gas (LPG) as a power source over alternatives like diesel and fuel oil because it is more environmentally friendly. Storage tanks and transportation for these would require monitoring for leaks.
Refineries, petrochemical plants, and other downstream operations produce hydrocarbon gases, such as propane, heptane, and butane for applications from primary fuel sources to byproducts of other chemical reactions. Each point of use or storage has the potential for leaks that can be toxic, flammable, explosive, or harm the environment.
Pellistor Integrated InfraRed Sensor
WirelessHART Vanguard Gas Detectors interface with existing networks to provide continuous coverage while reducing the cost of detecting toxic and combustible gases. Vanguard gas detectors handle a broad ambient operating temperature range (-40°C to 65°C); feature enhanced zero stability, and are equipped with interchangeable firmware that enables measurement of additional gases without changing the base unit.
Electrochemical Ammonia Sensor For more informa�on visit:
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Sensor heads for hydrocarbons gases will be available in January of 2020. In addition to NH3and hydrocarbons gas leak monitoring, Vanguard offers interchangeable sensor heads for methane (CH4), carbon monoxide (CO), and hydrogen sulfide (H2S.) Future Vanguard versions will detect other gases, including hydrogen from electric generators and battery rooms and oxygen that might be depleted in continuous emissions monitoring (CEM) shelters.
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