Review on 🧲 HFS Filled Vacuum Pressure Gauge: Accurate and Reliable Measurements for Precise Applications by Rob Allen

This was the second sensor to arrive and showed -5 to -7HG so I figured it was broken like the first. When I put it back in the box to return it, I saw a small tag on the top that said the nipple should be cut off the plug after installation. As soon as I did that, the scale dropped to zero. The problem is I bought this gauge for a handheld vacuum tester and if you tilt the gauge the oil drips everywhere and makes a mess! It looks like this sensor needs to be mounted vertically. It would be nice if they gave you this information before you buy!