Measure principle: using inert gas (Helium) to measure the closest real volume, and calculate the density.
Calculation principle: Boyle-Mariotte law.
Dual-chamber ：Dual-chamber is offered in the standard configuration for measure two samples at the same time.
Original touch screen control: as original design, the touch screen control system makes test process simply and conveniently. Operating, results reading, data backup are integrated in the only device.
Controllable test process: key-steps, as pumping speed and warm up time, are controllable for sensitive sample.