Safety 31 Fixed Gas Detection System Combines Worldwide Approvals with SIL 2 Capability


The Polytron 7000 fixed gas detection system from Draeger (Germany) now combines worldwide Approvals with Safety Integrity Levels (SIL* 2) capability. Supplied with a range of mounting capabilities for use in pump, relay, duct or remote applications, this modular system can also be used with a host of system functionality options. As a result, it brings enhanced flexibility, ease of use, reduced maintenance and minimal system downtime to any application requiring intrinsically safe gas detection.


Believed to be the first gas detector in the world to meet the needs of all toxic and oxygen requirements from a single platform, the versatile Draeger Polytron 7000 provides a fast, straightforward solution to the constantly changing requirements of toxic gas and oxygen measurement in both new and existing installations. Easily upgraded as and when required, the system allows each of the options to be mixed and matched to suit the needs of specific applications.


Offering 4 to 20ma and HART fieldbus capabilities, this accurate, reliable system incorporates sensor self-checking and data/event logging software. In addition, it is compatible with the PDA m515-Ex, which can be used to configure the transmitter, transfer concentration data to a PC, or to copy one configuration to another transmitter. Simple three-button navigation intuitively guides the user through the menu-driven functions and a large graphic display incorporates descriptive icons as well as plain text information to aid configuration and diagnosis.


Designed to bring the maximum level of operational choice to the user, the system utilises Draeger’s Polytron Docking Station technology that minimises system downtime and simplifies maintenance. This docking station can be pre-installed on walls and pipes without special mounting plates and, at commissioning, can be easily connected to the transmitter via a quick-lock mechanism.


Enabling the fast removal and replacement of “like-for-like” sensors that are equipped with a data memory storing calibration information, the Polytron 7000 is also designed to accept a pre-calibrated sensor under the cost effective Draeger Sensor Exchange Programme.


To ensure optimum performance and reliability, the system is fully compatible with the electrochemical DraegerSensor range. Designed for constant use in the toughest environments, these rugged sensors combine high sensitivity and extended life with long-term stability. Featuring an embedded data memory, DraegerSensors are able to store all sensor specific data such as gas, sensitivity, self-test parameters, predictive maintenance functions, sensor vitality, temperature compensation, cross-sensitivity and calibration information.


As the data is stored in the sensor and not in the transmitter, this means that calibration can be carried out anywhere and at any time. Eliminating the need for on-site calibration, this also means that as soon as the sensor is plugged into the transmitter, the necessary information is downloaded to the transmitter without requiring any further adjustments.


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New Portable Gas Detector with One-Button Simplicity


Honeywell (UK) announces the launch of GasAlertMicroClip XT, the latest member of the GasAlert family of portable gas detectors from BW Technologies by Honeywell.


The GasAlertMicroClip XT includes IntelliFlash™, which provides a visual indication of current operation to both the user and supervisor, and “force bump test” and “force calibration” functionality, to help to ensure that GasAlertMicroClip XT is always fully maintained and ready to detect gas.


There is a multi-gas detection of H2S, CO, Oxygen and combustibles; this provides you


with a robust monitoring solution designed to meet the challenges of a wide range of industrial applications including confined space entry.


GasAlertMicroClip XT also features a simplified and tamper-proof single button operation and an intuitive interface to reduce training time. It’s slim and compact design also means that GasAlertMicroClip XT is as easy and comfortable to wear as it is to use.


Reader Reply Card No 113 Reader Reply Card No 114 February / March 2011 • www.petro-online.com 100 Years of Experience Creates the Latest in IR Sensor Technology


For more than 100 years, Oldham from Industrial Scientific has specialised in safety and more particularly in gas and fire detection. The company offers a wide range of single gas and multi-gas portable detectors, fixed transmitters and controllers. Their products are always application-driven and solution-oriented. Whether for a single application or multiple rooms and areas, our monitoring solutions have been developed to meet the unique needs of our customers.


Oldham’s Research and Development department designs equipment that meets the latest international standards. They are dedicated to developing gas sensors, detectors and control units that meet or exceed these requirements. The company’s latest fixed monitoring solution combines the OLCT100, OLCT80 and OLCT60 gas detectors with the XP IR infrared sensor. This completes the Oldham line of fixed systems.


This new patented IR sensor from Oldham makes the OLCT100 XP IR one of the best and most reliable infrared detectors on the market. Infrared detection technology offers significant advantages when compared to catalytic detectors:


This sensor offers fail safe technology: optical detectors continuously control the intensity of infrared light sources. This intensity is maximal in the absence of gas, so any decrease in intensity will indicate that gas is present! XP IR requires far less maintenance than competing sensors, it is also immune to poisons, has a very long life expectancy and can operate in oxygen deficient atmospheres.


The OLCT100 XP IR was also developed to conform to the safety standards IEC 61508 and EN 50402. This means that the complete component design process has been analysed, verified and validated (including specifications definition, design methods, design tools, testing methods, review techniques and documentation).


As a result, the OLCT100 XP IR is SIL 2 certified according to IEC 61508 / to EN 50402 (EN 50502 is an European derivative standard from the generic IEC 61508: Electrical apparatus for the detection and measurement of combustible or toxic gases or vapours or of oxygen – Requirements on the functional safety of fixed gas detection systems). And, its Probability of Failure on Demand (PFD) is 0.35 10-3 with a yearly interval maintenance test.


With a century of expertise behind them, Oldham offers a wide variety of other helpful support services. Their highly professional, yet friendly, staff are always on hand to answer whatever technical questions you may have.


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