Today my order of G.H. Meiser Accu-Gauge tire pressure gauges arrived. I’d put in a bulk order of these for a few local folks with fat bikes, as we were all in need of a good low-pressure gauge to let us quantify tire pressures below 10 PSI. This gauge is almost universally recommended by those with lots of fat bike experience, and on initial tests I’m quite happy with it. The brass body has a gasket in it which seals against the body of the Presta valve, and a plug at the end opens the valve. Pressure is then displayed on the dial, and air can be let out (or the gauge itself emptied) by depressing the button on the top.
At ~$15/each after shipping I think these will prove to be worth it. Fat bikes are very pressure sensitive, so after learning exactly what pressures I like for what conditions this’ll do nicely for replicating that. Thus far I’ve been relying on a basic squeeze test to see if the tire feels appropriate. It’ll also be usable for regular mountain bike wheels, but I tend to be a bit above 30 PSI for my rear tire, limiting this gauge’s utility.