iv Health & Safety


New Wireless Hydrogen Sulphide Logger Improves Efficiency of Odour Abatement Trial


The project was run by Cobra Hydro, leading odour consultants and odour abatement chemical manufacturer. The trial site at a sewage treatment works in Essex has, for many years been a problematic site from a point of view for odour management and control. The site receives and processes sludge from Southend Sewage Treatment Works which is extremely sceptic and has controlled odours by a combination of liquid dosing and dry scrubbing technologies.


The liquid dosing is intended to reduce the sulphide levels to an acceptable level prior to the dry scrubbing system, so that the final scrubbing leaves a gas stream in a non noxious state.


Prior to these trials, Cobra Hydro carried out some odour logging with the


RTx Odalog H2S Logger from a1 cbiss and spot check samples with the Gastec Gas Detector Tubes. This indicated that the system was not


running efficiently and H2S levels of 80ppm were regularly being emitted into the local environment.


Cobra Hydro offered to run comparative trials of the existing chemical against Cobra Hydrox, a similar formulation that relies upon chlorine dioxide as the odour control method with an objective to optimise the formulation over the period of the trial.


To continually monitor the H2S levels, the RTx Odalog was the chosen instrument due to its wireless data download and its alarm notification


using the in built GSM modem. These features allow the project manager


to receive real time updates as to the trial progress and subsequent H2S emissions.


With an internet connection and a laptop with Odastat G software installed, the H2S data, which is key to the trial, could be accessed and reports can be written as the trial develops without having to attend site to physically download data.


Future uses would include an integration into a dosing system, allowing


the dosing chemical to increase or decrease in reaction to the H2S levels. This provides a fully automated odour abatement chemical dosing system, reducing chemical usage and engineer’s time spent on site, which results in an overall cost saving.


The RTx was thought to have reduced travel time by 40% compared to using the existing Odalog L2 with no wireless capability.


Reader Reply Card No. 143 15 year Warranty on Noise Measurement Equipment


Cirrus Research is delighted to announce that it is now able to offer a 15 year warranty on its noise measurement equipment including its award winning Optimus Green sound level meter.


The reliability and strength of Cirrus Research products is such that the company is providing this new extended warranty to any acoustic instrument manufactured by Cirrus Research from 1st September 2011 onwards.


Under the terms of the new scheme, Cirrus Research’s standard two year warranty can now be extended by a further 13 years at no additional cost; that is provided the instrument is routinely verified by Cirrus Research every year. The warranty covers all faults on the instrument, as well as minor accidental damage, excluding the microphone.


James Tingay, Group Marketing Manager at Cirrus Research comments: “We are delighted to be able to offer a 15 year warranty on our products. We hope that this extended warranty provides peace of mind for our customers that the equipment they purchase is reliable and will last the test of time.”


One of Cirrus Research’s products that now boasts a 15 year warranty is the Optimus Green sound level meter. The Optimus Green was awarded a Highly Commended within the British Safety Industry Federation (BSIF) Product Innovation category at this year’s BSIF Safety Awards. Designed for environmental, occupational and industrial hygiene noise, Optimus Green is the third range of sound level meters in the Optimus family.


James Tingay, commenting on the development of the Optimus Green said: “Cirrus Research found that restrictions in budgets had produced a demand for an instrument that can be used for environmental, occupational and industrial hygiene noise applications whilst maintaining the simplicity and ease of use found in instruments aimed specifically at the occupational health and safety market. The Optimus Green addresses this need and demand in a manner that is both simple and efficient.”


Reader Reply Card No. 142


Gas Detector Tube System Offers an Accurate and Cost Effective Spot Gas Detector Sampling System


The Kitagawa Gas Detector Tube System is now available at Shawcity Limited! The system is used by many industries to detect gases and vapours, simply and reliably, without the need for calibration, effort or a power supply. It’s as easy to use as 1-2-3!


The system is Lightweight, compact and easy to carry; simple to operate for all personnel; provides accurate reading in a few minutes; can be used in flammable atmospheres; Needs no calibration or power supply.


The System consists of a pump and a range of over 300 glass detector tubes, from Ammonia to Xylene. Also available are single inorganic and single organic detector tubes. You can use the simple search function on the Shawcity website to search for the needed chemical.


The tubes are filled with an absorbent material and chemical reagent which, when in the presence of the target gas, produces a colour stain along the tube. A calibration scale is printed on the tube to enable you to easily match the length of the colour stain to the concentration of the gas present.


The tubes themselves are shatter proof and can be used in a multitude of applications such as; industrial Hygiene, Fire/Explosion prevention, Process Control, Air Pollution Control and in Industrial Waste Water applications.


The Kitagawa system is multi-functional and can be used for measuring dissolved substances in solutions, compressed breathing air testing and even blood screening in criminal investigations.


Extra apparatus for the AP-20 pump offers remote testing in confined spaces and as no electricity is required, there is no added risk of explosion.


This is a simple tried and tested solution offered to you by Shawcity; you’re primary source for any monitoring solution and official UK agent for Kitagawa!


Reader Reply Card No. 144


New Radiation Survey Meter


Fluke (UK) has introduced the easy-to-use, handheld Fluke 481 Radiation Survey Meter which enables users to identify irradiated goods, equipment, surfaces or environments in industrial settings, and thus to help to remediate contamination and safety issues while minimally impacting operations. Areas of application include food processing or packaging screening, transported goods screening, screening of manufactured goods imported from Asia, screening at ports, and use by environmental health, fire and police personnel.


The rugged, auto-ranging Fluke 481 is handheld and portable with a simple two button process, enabling its use at Goods Inwards, in a warehouse or on the shop floor, for scanning vehicles, packages or


individuals. It simultaneously measures radiation rate and accumulated dose from beta, gamma and x-ray radiation sources, with the capability to record peak rate. It features an automated backlit display for easy reading in low-light situations.


The Fluke 481 is valuable for contamination detection, general radiation area metering, radiation-level monitoring, and hazardous materials assessment. Use of the device reassures employees that radiation risks are known, monitored and measured for their protection. If radiation is found, clear and quantifiable results allows assessment to risk, without overreacting with unnecessary steps that might halt operations, impact productivity or lead to lost revenue.


The Fluke 481 has an ergonomic, anti-fatigue handle with replaceable grip, a wrist strap and a tripod mount. There is an RS- 232 communications interface for data logging on a PC. It comes with guidance on performing shipping, receiving and perimeter surveys. A model is also available with a dose equivalent energy response in SI units.


Reader Reply Card No. 145 Reader Reply Card No. 146


IET November / December 2011 www.envirotech-online.com


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