Z&N or 1-Cube Gehaltameter?

[kererubrewing]

I need to do better than mouthometer for carbonation testing. I don't see us getting a deluxe Haffmans unit any time soon, but the Zahm&Nagel or 1-Cube each look decent. Has anyone had experience with the 1-Cube?

From I can see both rely on an accurate gauge so being able to calibrate and test the pressure gauge is going to be essential to having any luck with either device.

Here's a link to 1-Cube for the curious:

http://www.1-cube.com/laboratory-equipment-co2-measurement?tabpage=15&taboffset=0&ts=1&epc=107aen

[BrewinLou]

The Zahm pressure gauge has an adjustment screw on it so you can calibrate it yourself. I have never used the Qube, it says it is designed for measuring CO2 in a fermenter. I wonder if that is poor writing or they mean BBT? I also do not see an adjustment screw on the gauge for calibration.