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General Monitors has launched the Second Sight TC remote gas detection system for applications in petrochemical production, refining, storage, and distribution operations.

Second Sight, developed by Bertin Technologies, uses high-resolution infrared imaging to add another layer of safety to the detection of combustible and toxic gases.

Second Sight is a gross leak detector that can simultaneously detect up to four different gases.

It features a wide field of view (30deg standard) and a maximum detection range of 2km for continuous monitoring of critical areas.

Detection sensitivities are verified for quantities of hydrocarbon gas of approximately 2kg at 250m.

Gas cloud imaging allows plants to be run at higher levels of safety, efficiency, and economy through the ability to supervise large areas, identify the gas species when leaks occur, and see gas dilution in the atmosphere in real time.

In addition, Second Sight can be integrated into fire and gas panels through Ethernet and Modbus TCP/IP.

The Second Sight system is designed for ease of use, with a human-machine interface (HMI) that permits operators to see target gases in real time as they are detected by the IR camera.

A video image displays overlaid levels of gas concentrations to provide a picture of gas dispersal.

Personnel are able to efficiently address the source of leaks and effectively respond to alarms based on the type of gas and the size, direction, and speed of evolution of the gas cloud.

With the HMI, users can deselect areas within the imager’s field of view that are not of interest or may contain potential sources of false alarm.

Second Sight is a low-maintenance system.

It requires no gas calibration in the field and automatically performs an optical check every 30 minutes that assesses window cleanliness, optical path integrity, optical alignment, and focal plane array position.

A video recorder function allows Second Sight operators to play back alarm events and record current detection, while stored files enable safety personnel to view images and concentration profiles of events as they unfold over time.

The ability to visually log events improves the management of plant safety records while reducing the time and complexity of the event analysis process, saving time and money while increasing protection.

The Second Sight system features a long-wave infrared (LWIR) camera with a spectral range of 8-14um (IR) at a spatial resolution of 384 x 272pixels.

The camera has a standard maximum range of 3,281ft (1,000m) and an optional range of up to 6,562ft (2,000m).

It can detect methane at 0.1 LEL-m, propylene at 0.1 LEL-m, butane at 0.3 LEL-m, and propane at 0.5 LEL-m.

It operates at a temperature range of -10C to 55C (14F to 131F) and humidity range of 0-95 per cent RH, non-condensing.

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