A method and system for determining a hydrocarbon dewpoint of natural gas in which a spherical acoustic resonator is filled with natural gas at a first temperature and pressure, where the first temperature is above the hydrocarbon dewpoint at the pressure. The print out is randomly, sequentially or a combination selected by a selection device to contain one or more selected value additions such as coupons for discount pricing for the printer itself, peripheral and the like, whereby the demonstration user keeps, rather than discards the print out. The head is mounted on the microactuator.