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<blockquote data-quote="RossKean" data-source="post: 1391488" data-attributes="member: 19880"><p>A differential gauge is probably the way to go unless you want to spend big bucks on an accurate (electronic or mechanical) absolute vacuum gauge. A home-made liquid manometer or a device like the Morgan CarbTune is probably the simplest; especially if absolute vacuum is not (as) important. I saw the electronic gauges when looking for the CarbTune and thought I would ask if anyone had tried them. While mercury sticks are favored by some, I wouldn't use them. Materials are hazardous and could cause real damage if the liquid gets sucked into the engine! Water (or transmission fluid) in a manometer wouldn't do any harm and either is actually far more sensitive because of the much lower density.</p></blockquote><p></p>
[QUOTE="RossKean, post: 1391488, member: 19880"] A differential gauge is probably the way to go unless you want to spend big bucks on an accurate (electronic or mechanical) absolute vacuum gauge. A home-made liquid manometer or a device like the Morgan CarbTune is probably the simplest; especially if absolute vacuum is not (as) important. I saw the electronic gauges when looking for the CarbTune and thought I would ask if anyone had tried them. While mercury sticks are favored by some, I wouldn't use them. Materials are hazardous and could cause real damage if the liquid gets sucked into the engine! Water (or transmission fluid) in a manometer wouldn't do any harm and either is actually far more sensitive because of the much lower density. [/QUOTE]
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