I just purchase a used co2 setup for $50. To me this is worth it for just the co2 cylinder. Anyway it came with a no name regulator. I used regulators in the past at work, but I am used to the $500 Parker regulator with two gauges. One gauges showing tank pressure and another to show output pressure. From the picture, there is only 1 gauge showing up to 150 PSI which is the output pressure. I guess you know the tank is empty when the pressure drop to zero. Anyone have a regulator similar to this? Is this regulator safe to use or should I get a new one?