Built upon deep understanding, reputation and reliability of Cerulean’s linear smoking machine, the SM450i has been designed and developed to become the market leading linear smoking machine of choice for routine and R&D laboratories worldwide.
Cerulean is renowned globally for their 20 channel linear smoking machine, the SM450. Launched more than 10 years ago, the SM450 has become the linear smoking machine of choice and the work-horse of many smoking laboratories.
In the last two years, Cerulean has investigated the effect on uniformity of yields of airflows, lighter coil temperature, rotary vs. linear schemes, dead volumes and user behavior.
Utilizing the same user interface structure as the SM450, the SM450i will allow existing users a smooth and easy transition from an existing machine to the next generation of smoking machines.
The Sm450i includes a range of enhancements to improve performance and consistency of yields: automatic sample lighting, automatic air-flap actuation, automatic warm-up cycling, automatic CO calibration, independent intelligent puff engines available in two sizes – 70ml / 210ml, standard cotton or new optical termination detection, built-in temperature and pressure sensors, left or right hand PC mounting, left or right hand smoke extraction, minimized and reduced dead volume when using liquid capture impingers.
Despite conforming to ISO3308 requirements, the airflows around the measurement point can vary significantly depending on detailed design factors and so affect the yields obtained from an apparently ISO3308 compliant device.
Using computational fluid dynamic modelling, Cerulean has developed an in-depth understanding of what is actually happening within the linear smoking machine extraction hood.
Extensive computer modelling and physical modelling studies have been performed to allow Cerulean to develop a new linear smoking machine based on the tried-and-trusted aspects of the successful SM450 then improved for today’s demands for ISO, intensive smoking and analyte capture.
With an ever-increasing demand for collection through liquid capture impingers, Cerulean has concentrated on achieving drastically lowered dead volumes between the sample and the first liquid capture device. With a dead volume of less than 2 ml from back of the port to the impinger, the SM450i has the lowest standard configuration dead-volumes available on a linear smoking machine available today.
Cerulean has gained a greater understanding of the different airflows observed across the linear smoking machine. The magnitude, turbulence, and uniformity of air flow across the machine are all critical. The ‘end-effect’ is well known and the easiest way to understand the affect that this has on air turbulence is by the analogy of water on a beach, crashing waves are caused when the water slows due to the resistance of the seabed and the top of the water overtakes the slowing water causing crashing waves. A similar effect occurs within the smoking machine extraction hood where air is moving over static surfaces. By introducing a patent pending aerofoil, the turbulence is drastically reduced allowing more consistent, smooth and repeatable airflows across the machine.