🔵 Yellow Jacket 49138 3-1/8" Blue Compound, 30", 0-350 psi, R-22/404A/410A Gauge Degrees F (Pack of 2) Review

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My last sensor broke after 5 years of regular use, so I bought this one. I just found an old set of unnamed gauges that could probably be reused with new dials.

I received this gauge to replace another Yellow Jacket gauge, the 40332 Short Sleeve Composite Gauge. The 40332 included a clutch that cost about $18, but was -3 to -6 psi off zero and could not be corrected by adjusting the calibration screw. This sensor, 49138, outperforms it in every respect but one. It has a longer range, larger face (and therefore greater resolution) and most importantly, it's out of the box and adjustable above and below zero. It is accurate and is a professional HVAC…

If you're a DIYer like me, you might need this sensor. You've got a cheap set of headers and you're trying to do your best, but do you really trust your Chinese gauges? No? That's right, you shouldn't. They lie. So you need at least one authoritative sensor like this. I use it with a 1/8 to 1/4 mfl quick disconnect so I can mount it anywhere, next to the manifold or on its own. Calibration purpose aside, this quick connect pressure gauge is great for leaving in a nitrogen pressurized system for