To reduce operational costs in today’s unstable economy, a lab or facility manager with a new ICP/Mass Spec system must cost-effectively use cryogenic liquid argon dewars to offer gaseous argon.
In terms of specific critical gases requirements, one attractive choice is the application of Cryogenic storage Dewar, commonly called dewars, to provide gaseous argon to ICP and ICP/Mass Specs. Argon’s unit cost per cubic foot/gaseous liter is quite a bit lower when delivered to your facility in cryogenic liquid form in dewars. However, since these containers keep the gas within a cryogenic form until it really is dispensed being a gas, there are 2 conditions that can decrease the cost-effectiveness of utilizing this mode of supply.
Because the argon is held in self-pressurizing containers with relief valves and the cryogenic liquid is boiling inside, reserve containers expecting the main container to empty on a system will, after a while, build internal pressure until the relief valve setting is reached and then set out to vent excess gas for a price of 2 to 3 percent each day. Here is the NER or Normal Evaporation Rate, referenced in the marketplace because the “use it or lose it” phenomenon. At this particular rate, when the reserve cylinder of argon contains 4,500 cubic feet of gas, it equals losing 135 cubic feet each day it sits in reserve. It wouldn’t require much time to consume up whatever savings resulted from your lower unit cost.
Since most of the gas is in cryogenic form, the strain within the container will not indicate in the event the unit is full, half full or empty. The little liquid level indicators along with the dewars take time and effort to learn rather than very accurate. Since the majority gas distribution systems rely solely on pressure to modify from primary to reserve cylinders, false low-pressure readings might cause lab personnel to remove containers with around 25 % of the contents still inside.
Solution: CONCOA’s Intelligent Gas Distribution System IntelliSwitch II continuously monitors your reserve container’s pressure, using programmed software logic to figure out when a container is actually empty or contains residual product. IntelliSwitch II 538 Series is definitely the latest within the collection of computer-controlled gas distribution switchover systems using very accurate transducers to keep track of both primary and reserve inlet pressures. Proprietary software logic uses this data to drastically reduce evaporation loss by switching to the reserve dewar to deliver the gas for the instrument prior to the relief valve opens, drawing down pressure in the container into a programmed point, and after that returning to the main dewar. This “economizer function” can virtually eliminate losses from the reserve Cryogenic ISO Tank Container.
Additionally, when primary dewar pressure drops beneath the point from which the device switches for the reserve, IntelliSwitch II fails to immediately conclude how the container is empty. It waits a programmable period of time and even though offering the system through the reserve, watches the strain reading in the primary. In case the pressure rises 46dexkpky the switchover reason for that time period, your computer concludes residual liquid was left from the container and switches to it to supply the instrument. It will this repeatedly till the dewar fails to build pressure over the programmable switchover point, at which time it switches towards the reserve, and sounds an alarm to indicate the principal has become truly empty. This “look-back feature” decreases the residual discarded when you use dewars to less than 2 to 3 percent.
By eliminating evaporation loss and reducing the residual left in empty containers, CONCOA’s IntelliSwitch II optimizes the charge savings of making use of Cryogenic Centrifugal Pump to deliver gas to ICP or ICP/Mass Specs.