Toxic gas monitoring by wireless.

In response to the critical need for monitoring of toxic hydrogen sulphide gas in wellheads, tank farms, and other remote locations, Emerson has introduced its first fully integrated wireless gas monitor. The Rosemount™ 928 Wireless Gas Monitor is a fully integrated WirelessHART® toxic gas monitoring solution. The Rosemount 928 significantly improves safety in areas and applications that were previously considered to be too expensive and difficult to monitor due to remote or difficult-to-access locations, challenging topology, and other issues.

Sean McLeskey, product manager, flame and gas detection, Emerson Automation Solutions says “The need for hydrogen sulphide monitoring at these challenging locations is critical. The fact that companies can now so easily solve what has been such a challenging problem is a testament to the power of wireless technology. For current users of wireless solutions – or those considering a move to wireless – the Rosemount 928 is another step in their commitment to increasing safety at their facilities.”

Workers approaching sites like wellheads and remote tank batteries for maintenance are constantly in danger of exposure to unplanned releases of toxic gas. Monitoring these sites with conventional wired gas detection systems is often cost-prohibitive or logistically impossible. The installation, wiring, and commissioning costs for each additional wired device can add tens of thousands of euros to the instrument’s total installed cost. As a result, operators have been forced to rely on portable gas monitoring devices which provide no early warning or personnel safety, or even worse, carry on with no gas monitoring at all.

The Rosemount 928 gas monitor integrates into a WirelessHART network, eliminating wiring and dramatically reducing installation, commissioning, and maintenance costs. Once integrated into the wireless network, personnel simply check the status of the remote monitoring system to know if a maintenance trip is safe.

In addition, the Rosemount 928 gas monitor includes a power module and the Rosemount 628 toxic gas sensor module that are both intrinsically safe and can be replaced in the field in minutes without the need for tools. The Rosemount 628 is a ‘smart’ sensor module, meaning that calibration information is stored within the sensor not the transmitter. This allows users to calibrate the sensor in a non-hazardous location and carry it into the field for quick exchanges with installed sensors. This further enhances personnel safety by minimising their time spent in potentially hazardous locations.

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