Small portable containers

Liquid argon is shipped and stored in small portable containers (dewar flasks), which hold quantities ranging from 1 gal to 25 gal (4 L to 95 L) or more. These containers are encased in shells and are heavily insulated they maintain the liquid at atmospheric pressure. 

Liquid oxygen is packaged in small portable containers that hold quantities ranging from 1 to more than 25 gallons (4 to 90 L). These containers, generally termed dewars, are encased in steel shells and are vacuum insulated they maintain the liquid at atmospheric pressure and are consequently not subject to DOT regulations. 

Originally confined to the shipment of crude raw materials and fuels, the term transportation of bulk sohds now apphes also to manufactured produc ts, which often become raw materials for other industries. In recent years, increasing tonnages of highly processed, finished chemical products have moved to customers in large bulk units. A useful definition of a bulk shipment is any unit greater than 2000 kg (4000 lb) or 2 m (70 fF). The containers available range from small portable hoppers of 2-m (70-fF) capacity to railroad cars of 255-m (9000-fF) capacity. 

Medium, (e.g. one-ton cyLnder, portable containers, nurse tanks, multiple small packages.)... 

Small, portable sensors are now available to monitor the air we breathe for such toxins as carbon monoxide, CO. As soon as the air contains more than a critical concentration of CO, the sensor alerts the householder, who then opens a window or identifies the source of the gas. 

In some facilities, there is a need for refrigerated storage of one or more flammable or combustible raw materials, catalysts, intermediate products, or finished goods. These materials may be in solid or liquid form in containers, boxes, drums, or small portable tanks. Depending on quantity of materials to be stored and required temperature, these facilities can range from cold storage warehouses for storage of food products to walk-in freezer rooms for pharmaceutical materials. 

In order to evaluate the concentration of volatile organic compounds (VOCs), there exist small, portable instruments that contain, essentially, a flame ionisation detector that allows the measurement of the carbon content of the atmosphere without chromatographic separation. 

The power consumption of the vibrating membrane is low allowing small batteries to power the device. Because the additional components (fluid reservoir, electronics, mouthpiece, and valves) do not require large volumes, it should be feasible to develop a small, portable nebulizer with a self-contained battery... 

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