The temperature at which a liquid becomes semi-solid is deduced through pressure analysis of samples cooled to precise temperature intervals.
The low mass measuring cell traps a small amount of the sample, which is then cooled at a controlled rate. At pre-set temperature intervals the sample is micro-pulsed by a piston driven by a stepper motor. Sample movement is detected by a differential pressure sensor connected across the measuring cell.
Cooling is continued until the applied pressure pulse generates a positive differential pressure indicating that the sample is no longer moving; this temperature is taken as the no-flow point. The old sample is then warmed and flushed away and the cycle is repeated.
ICON's Pour Point analyzer indicates the lowest temperature at which the sample may flow under standard test conditions. It determines the pour point and no-flow point for petroleum products
ICON's Peltier cooling technology delivers exceptionally accurate and repeatable measurement results, in most cases without the requirement for chilled water.
Pour Point's cooling system is housed in a unique patented, sealed containment vessel held under vacuum, which improves performance and eliminates condensation and ice formation. For maximum reassurance, detection systems monitor the vacuum and alert the user to any sample leakage.Website