PLCS Sensor Bags are the only balloon stoppers that can continuously monitor pressure in the main during shutdown, without the need for an additional tap.

They are designed for Control-Gas conditions, but can be used in traditional "open-hole" operations. The bladder is held inside a synthetic fabric using a thin wall construction that permits mains entry through a significantly smaller taphole than any competitive product.

• Sensor Bags record the internal bag pressure and continuously record the upstream pressure in the main through a single tapping.
• The bags are barrel shaped to increase load on the pipe wall to retain position and at the same time increase the surface seal area to minimize gas bypass.
• Sensor Bags are clamped to a semi-rigid inflation core to control entry direction and prevent reversal in the main or bag loss during sudden deflation.
• Standard sizes are available for all cast iron and steel mains from 2"-48".
• Special sizes for PE plastic pipe.
• Rated at 1¼" psi for mains up to 12".

Available with rigid inflation control tee and rubber entry stopper In an "open-hole" Double Block and Bleed shutdown, Sensor Bags are recommended for use in pairs at each end of the shutdown. By using 2 Sensor Bags not only is the internal bag pressure recorded, but also it is possible to confirm a zero pressure zone between the bags as well as separately monitor the upstream and downstream mains pressures.

Sensor Bags can also be used in conjunction with ALH System-One tapping equipment to perform Control-Gas shutdowns.

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