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Gas Detection New Open Path Gas Detectors Eliminate False Alarms
Senscient's (USA) new ELDS Series Open Path Gas Detectors (OPGDs) feature truly false-alarm free flammable and toxic gas detection. ELDS gas detectors, scheduled to begin shipping in the first quarter of 2009, solve a problem common in the oil and gas industry: unreliable readings causing false alarms that cost millions of dollars in lost revenue annually. Safety systems triggered by the detection of potentially hazardous gases typically shut down processes and facilities to prevent catastrophe. But when a false alarm triggers the system, productivity is lost while the alarm origin is investigated, false alarm status is verified, and processes are slowly brought back on line.
Using Enhanced Laser Diode Spectroscopy (ELDSTM ), Senscient ELDS detectors automatically ignore interferences from any non-target gases and vapors such as organic surfactants,
alcohols, diesel fumes and oil mist or atmospheric elements such as rain, fog, and snow that can cause spurious alarms for traditional NDIR or LDS-based open path gas detection systems. This makes Senscient ELDS detectors especially appealing in safety applications where greater than 90% uptime performance is required in environmentally challenging installations.
Senscient ELDS OPGD detectors, using Harmonic FingerprintTM technology and other advanced features, will initially be available for the detection of either Methane-only gas, or
Simultaneous Methane and Hydrogen Sulfide gases in the same system with absolute selectivity. Instrument capabilities and configurations for additional critical hydrocarbon and toxic gases will be introduced later in 2009.
Senscient ELDS Series 1000 and 2000 detectors in a separate transmitter and receiver configuration are capable of establishing coverage from 5 to 40 meters, and up to 200 meters, depending upon the target gas and the required Minimum Reliably Detectable Quantities for the target gas of choice. A target gas reading from anywhere along its beam triggers either an isolated single or dual analog or digital communications signal to a remote safety PLC.
"Our ultra-sensitive and false alarm-free ELDS technology provides the operator with the absolute certainty of a gas leak as well as the earliest warning response of any other methane or hydrogen sulfide detection technology on the market today, providing precious time for remedial action to shut down plant processes and evacuate personnel only when necessary," according to Jean Berthold, Senscient CSMO and VP.
Senscient ELDS Series 1000 and 2000 gas detectors are designed to meet or exceed the most current toxic and flammable gas detection global safety standards for offshore oil drilling platforms, FPSOs, onshore petrochemical facilities and oil refineries.
Reader Reply Card no 23
Performance Test Approvals for Multi-Gas Detectors
New Gas Detector for Zone 0
The DGTec-ex from Detector Oy (Finland) is a new generation of digital gas detector for explosive atmospheres (zone 0, 1 and 2). The detector is fitted with an electro-chemical sensor. It is designed to monitor the presence of either oxygen, hydrogen or toxic gases in the process of food, drug and petrochemical industry - all parameters defined according to the customer's specification!
Other environments with Ex-classifications in which this reliable measuring technology can be used are in i.e. hospitals, laboratories, compressor rooms and water treatment plants.
Due to the fact that the sensor element is target specific it will only react with the measured gas. This reduces radically the risk of false alarm. The biggest advantage with the digital measuring technology is achieved when the detectors are connected to the innovative SCAN- series gas controllers.
Wireless monitoring and reporting
GfG (Germany) announce that performance test approval for its' G450 and G460 multi-gas detectors has been achieved.
It is a legal requirement in EU countries that portable multi-gas detectors used in hazardous locations should have their gas detection performance tested and verified by an independent test authority, and approved to EN European standards.
The G450 and G460 are certified to the following standards:-
EN 60079-29-1Performance test for combustible gas sensors
EN 50104 Performance test for oxygen EN 45544-1 Performance test for toxic gases EN 45544-2 Performance test for toxic gases EN 50271 Software
In addition, the flammable gas performance test approval (EN 60079-29-1) for the G450 and G460 includes methane, propane, hexane and n-nonane, so the user is protected against the whole range of combustible gases that may be encountered.
"For many years, users of gas detection instruments have had no sure way of knowing that the product they are using is actually doing the job it was intended for", said Gavin Boorman, President of GfG Europe. "ATEX approval is essential to ensure electrical safety, but ATEX alone does not tell you if your gas detector is actually detecting gas in compliance with the required standards. These new EN standards for performance testing give users peace of mind that the gas detection performance of the product they choose has been independently tested, and that it complies with the required standards."
Reader Reply Card no 25
When contacting companies from this issue of Asian Environmental Technology please tell them where you saw their products
Thankyou AET AET April/May 2010 New Gas Detection Digital Modbus Wall Mount Controller
New and Award Winning Gas Detection Digital Modbus RTU Wall Mount Controller, TA-2016MB-WM designed and manufactured by Mil-Ram Technology (USA) features a 16-channel system utilising RS-485 Modbus RTU Multi-drop smarter Transmitter (Sensor) Network. Four relays (SPST), 10 Amp. are common to all channels. Select latching or non-latching function. Low, Mid, High, Fault relays. LED alarm indicators. Local buzzer.
Options: Remote Relay Modules, Modbus enabled, can be installed at any point on RS-485 network. Up to 16 modules per network and up to 16 different zones. Conveniently install relays at point of use, which eliminates long wiring runs between relays and field installed alarms. Remote Analog Output Module provides discrete analog 4-20mA output (16 bit resolution) per channel. Remote Digital Output Module provides RS-485 Modbus RTU interface to Centralized System (e.g. PLC). Analog Input Module to connect standard 4-20mA Transmitters where traditional analog installation is preferred. Backlit 16 characters x 2 lines LCD display. Auto-scrolls to provide channel data and fault conditionals. Indicates alarm status. Simple non-intrusive setup using magnet. Auto-Configuration wizard provides rapid channel setup without special knowledge. Nema 4x weatherproof polycarbonate enclosure. Continuous Diagnostics. Explosion-proof enclosure, 8-channel wall mount controller, external alarm stations and wireless are all options that are available.
Use with any Mil-Ram Model TA-2100MB smarter Gas Detection Transmitters, Toxic/LEL/VOC/Oxygen, which detect hundreds of different gases and vapors.
Reader Reply Card no 26
Wireless setting of the parameters as well as calibration of the new digital gas detector is done by using the IR Communicator (IRC). The data is stored in the IRC. If needed a report with data of i.e. the last calibration and settings of the equipment with serial numbers can be printed out for authority use.
Before the delivery the detector DGTec-ex is calibrated at the factory for the right measuring range according to the monitoring needs of the customer. Since the detector is ATEX-certified only personnel authorised by Detector Oy is entitled to calibrate and to service the detector.
Reader Reply Card no 24
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