[Porchdog]

We need calibrated pressure gauges at work. We buy new ones every other year - it's less expensive than getting them calibrated by an outside vendor.

At my previous job we had test gauges all over the plant that needed to be calibrated. We had our own, in house metrology lab. They calibrated measuring tools, pressure gauges (deadweight), thermometers and scales.

That was pretty handy for my personal stuff.

My digital and analog gauges haven't been checked in years. They do match each other and they exactly agree with the TPMS on two cars, so I think they are good enough for my purpose.