40 Gas Detection New Gas Detector Right for Confined Space Entry
Working in confined spaces is difficult at the best of times. Operators often have to wear full PPE (personal protective equipment), are usually harnessed and may be carrying tools and equipment to complete the task in hand (e.g. welding). The last thing a worker in this environment needs to worry about is his or her gas detector. It should be designed specifically for confined space entry (CSE) applications, be unobtrusive and have a clear display that is easy to see at a glance.
According to the UK’s Health and Safety Executive (HSE) a confined space means ‘any place, including any chamber, tank, vat, silo, pit, trench, pipe, sewer, flue, well or other similar space in which, by virtue of its enclosed nature, there arises a reasonably foreseeable risk’.
Users of gas detectors have typically had to make a choice between large pumped units, small diffusion models, or models with ‘parasitic’ pumps, which are easily lost or damaged. Handheld detectors that measure a wider range of gases tend to have front-mount displays and are usually optimised for leak location or ‘hot work’ permit issue, rather than being suitable for CSE work.
The new Gas-Pro from Crowcon (UK) is compact and comparable in size to leading front-mount diffusion detectors. It has a bright, clear top-mount display that can be read at a glance without having to touch the detector. A dual colour backlight adds an extra level of alert should the Gas-Pro enter alarm status. An internal pump means that pre-entry testing can be done quickly and easily. This also keeps the size of the detector small and removes the problems of poor sealing or the need for extra equipment and chargers associated with parasitic pumps.
Unique to the Gas-Pro, +ve Safety™ provides tri-colour status indication, giving quick and effective monitoring of gas test (bump), calibration, over range and recent alarm notification. There are Multiple gas sensors for up to five potentially hazardous gases from an extremely wide range including, hydrogen sulphide, carbon monoxide, carbon dioxide, oxygen and flammable gases, as well as industry-specific gases such as ozone, ammonia, chlorine, chlorine dioxide and sulphur dioxide. In addition, Gas-Pro is extremely rugged and has IP65 &IP67 ingress protection with an extremely loud >95 dB alarm as well as a vibrating and dual colour visual warnings as standard.
Crowcon’s new Gas-Pro CSE detector is therefore a new category of product designed for just one purpose – ensuring gas safety in confined spaces. Free from worries about what risks might come with compromise, personnel entering these spaces will be more focused on their core activities, safe in the knowledge that their gas detector is focused on its core activity.
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New Portable Multi-Gas Solution BW Technologies by Honeywell announces the arrival of the multi-gas solution, the GasAlertMax XT.
Simultaneously monitoring for hydrogen sulphide (H2S) carbon monoxide (CO), oxygen (O2) and combustibles (%LEL), the GasAlertMax XT features a non-intrusive integrated sampling pump and SmartSample diaphragm pump technology. By offering one-button operation, the GasAlertMax XT provides ease of use and simple compliance to industry safety standards. Tamper-proof, user adjustable options enable the instrument to be customised to suit your specific application.
The GasAlertMax XT is ideally suited to a range of applications and customers including confined space entry, oil and gas, marine and shipping, utilities, wastewater treatment plants, power generation and municipal needs.
Powered by rechargeable batteries that provide enough power for an entire 13 hour shift, the compact GasAlertMax XT comes with standard event logging and datalogging. Calibration is simple with an automatic procedure. The GasAlertMax XT is compatible with the BW MicroDock II automatic test and calibration system. Multi-language support is available in English, French, German, Spanish and Portuguese.
Reader Reply Card No. 103
The intrinsically safe Dräger (Germany) X-act 5000 features a totally new pump concept. It can be used for short-term Dräger-Tubes, Simultaneous Test-Sets of five tubes, and sampling tubes. The pump control takes into account the specific flow characteristic required for each tube. Compared to the Dräger accuro hand pump, the average measurement time is reduced considerably for multiple stroke tubes. The internal pump capacity allows the use of extension hoses with a length of up to 30 meters.
The parameters are contained in a bar code on the back of the packaging of the short-term Dräger- Tubes. If you run this bar code across the bar code reader, the name of the measured substance, the required number of strokes and the effective range are automatically transferred and displayed in the LCD of the X-act 5000. The preparation for each measurement is simplified and possible errors are significantly reduced.
Dräger-Tubes for short-term measurements are calibrated for measuring substances in ambient air. Technical gases have a viscosity different than ambient air and, therefore, require a different pump flow setting. The X-act 5000 can be adjusted automatically by connecting the pump to the technical gas. This is all handled through the intuitive menu structure. The end result is the tubes can be read directly.
All required parameters for sampling can be entered directly depending on the applied sampling tube or system. The X-act 5000 applies the flow rate automatically - additional system calibration using an external flow meter is no longer required. Measuring starts immediately after setting the sampling duration. At the end of the measurement time, the pump stops automatically and the display shows the settings together with the elapsed time and the pumped volume.
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New Automatic Tube Pump
IET November / December 2011
www.envirotech-online.com
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