Although the positive displacement technique allows accurate measurement of the total flow through the cigarette, and thus accurate integration of total legislated emissions such as CO and particle mass, such systems are less suited to producing real-time concentration data during continuously varying flow conditions.
Since the pyrolysis in the tobacco rod varies throughout the puff (end of puff temperatures are significantly higher) there is interest in measuring the variations in emissions both intra and inter puff.
To allow researchers to monitor real-time emissions while reproducing a continuously varying flow profile, Cambustion launched the SCS in 2007.
The SCS measures the flow through the cigarette in real-time, and uses a variable HEPA filtered dilution flow to follow the cigarette flow profile, flexibly reproducing a variety of smoking regimes.
The SCS is used by researchers in Asia, Europe and North America, and SCS data frequently appears at conferences such as AAAR and CORESTA.
The SCS allows access to both main and sidestream smoke for both real-time and offline analysis with a wide range of equipment.
- Up to 25 Hz flow controller
- Accurate mass integration
- Analogue outputs for sample flow and dilution ratio allows accurate real time concentation measurements
- Heated sample head
- Flexible smoking regimes, including ISO, Health Canada, and user specified flow/time programmes
When used with the DMS500 it allows real-time measurement of the particle size distribution during a pre-programmed puff profile. CVS operation ensures accurate mass and number integration during puffs.
When used with the NDIR500 it allows real-time measurement of the CO and CO2 concentration during a pre-programmed puff profile. CVS operation ensures accurate mass and number integration during puffs.
An optional mounting accessory is available to allow direct coupling to a Malvern Spraytec with inhalation cell with an optional trigger output from the SCS to allow automated Spraytec measurements.
The SCS is also used to study electronic cigarettes (e-cigarettes), where its flexible smoking capability allows investigation of both performance of e-cigarettes under standard smoking regimes and the reproduction of real world smoking profiles.Download an application note on the measurement of e-cigarettes with the SCS.
The SCS is capable of prolonged continuous operation, simplifying study of e-cigarette performance variations due to battery/liquid levels.
The SCS is also fully compatible with novel technologies such as heat not burn, where flexibility regarding resistance to draw and smoking profiles allows full characterisation of product performance.
The SCS can also be used as a stand alone system for filter paper measurements.
Twin Head SCS for Puff Inhalation Exhalation studies
The Twin Head SCS was developed to provide the facility to make puff inhalation exhalation studies, such as are needed for retention studies. The Twin Head SCS is available with a lung simulator, to allow inhaled smoke to be aged before exhalation. The Twin Head SCS allows direct measurements to assist with refinement of lung models.