30 Gas Detection Toxic Gas Detector Receives IECEx Approval
The TS4000H Intelligent Toxic Gas Detector from General Monitors (USA) is now IECEx approved, informing General Monitors’ customers the TS4000H has been independently evaluated and found to be in compliance with international safety standards for explosive environments. The TS4000H offers protection against a wide range of hazardous industrial gases and is able to safeguard against oxygen deficiency.
The International Electrotechnical Commission (IEC) established the IECEx mark to facilitate international trade in equipment for explosive atmospheres and hazardous locations. Benefits to IECEx approval include reduced testing and certification costs to the manufacturer, reduced time to market, international confidence in the product assessment process, one international database listing and increased international confidence in IECEx-certified equipment and services. GeneralMonitors’ customers can be assured that the TS4000H and its manufacturing facilities have been and will continue to be independently assessed for compliance with rigorous international standards.
With its advanced design, the TS4000H Toxic Gas Detector offers many valuable features including event logging, a clearly visible LED, and an indicator for remaining sensor life. The TS4000H is compatible with the HART communications protocol for uniform and consistent communication without disturbing the integrity of the 4-20 mA analogue signal, and is also available in a Modbus configuration and with three 8A relays. All of the electronics are contained within an explosion-proof housing so that sensor information can be processed at the sensor site.
Additionally, the interface module’s galvanically-isolated, intrinsically-safe design supports sensor field replacement without special tools or hot work permits. Furthermore, the detector is easy to install and can self calibrate by activating a magnetic switch and applying gas. Process engineers who need to protect people, equipment, and the environment will find the TS4000H well suited for a broad range of industries: Petrochemical installations, oil and gas production facilities, water and wastewater treatment sites, and power plants are some of hazardous environments to which the TS4000H can add great value. For worldwide application, the detector also complies with ATEX, CSA, CE, GOST in addition to IECEx, and is certified for use in SIL 2 environments.
The TS4000H monitors a variety of toxic gases like ammonia, carbon monoxide, chlorine, chlorine dioxide, hydrogen, hydrogen chloride, hydrogen sulphide, nitric oxide, nitrogen dioxide, oxygen deficiency, ozone, and sulphur dioxide. The system displays gas concentrations up to 500 ppm, fault codes for troubleshooting, prompts when calibration is needed, and provides complete status to the control room.
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Gas Monitoring to Discover Impact of Potential Foot and Mouth Epidemic
At a Korean government research facility, an experiment was designed to see what the environmental impact would be if a large number of animals had to be buried due to a potential foot and mouth epidemic.
For a three year project which began in February 2012, five animal graves were specially constructed and filled with different numbers of dead pigs and cattle, and the gases and liquids produced by the decomposing carcasses are being routinely measured.
To monitor the gases, the project requires reliable continuous gas monitoring equipment for unsupervised monitoring of the emissions over the course of the three years. Three Geotech (UK) GA3000 fixed biogas analysers, supplied and supported by ENInstrument, were chosen for the job.
The Geotech GA3000s are monitoring levels of CH4, CO2, O2 and H2S coming from within the graves. Temperature is also of interest to the researchers and is being monitored with a separate device.
The GA3000 has since been superseded by the GA3000 PLUS. Both offer reliable monitoring of CH4, CO2 and O2 as standard. The GA3000 PLUS can monitor both high and low range H2S, and now has new Profibus communications.
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Intrinsically Safe Wireless Communication for EX Areas
Designed for worldwide applications where wiring is impractical or unaffordable, Banner Engineering’s (Belgium) DX99 nodes and the devices they monitor are battery powered, enabling easy and reliable signal transmission up to 3 km from explosive atmospheres.
Metal housing nodes are configured with internal battery, and can be connected to any kind of sensing device with digital or analogue output. DX99 Metal housings are ATEX and CSA certified for explosive dust and gas atmospheres, to be used in Class I, Division 1, Groups A, B, C, D; Class II, Division 1, Groups E, F, G; Class III, Division 1; Category 1G, Group IIC, Zone 0; and Dust, Category 1D, Group II, Zone 20. Nodes are IP67 rated and provide simple DIP switch configuration.
Transceivers provide bidirectional communication between the Gateway and Node, including fully acknowledged data transmission. Lost RF links are detected and relevant outputs set to user-defined conditions.
The DX99-D4 can operate in RS485 Modbus RTU Mode to connect any 3rd party Modbus Slave sensor, and in Analogue Mode to connect 1-5VDC Pressure Transducers for very long battery life. The DX99-D5 is specifically designed to work with 4-20mA flow meters, pulsed or guided-wave Radar with up to 60 seconds warm-up time.
The DX99 FlexPower nodes expand the capability of Banner Engineering’s SureCross wireless solutions to hazardous applications in numerous industries including water treatment, waste management as well as coal, mining, oil & gas, grain handling, power generation, cement.
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