I wanted to share a little trick I used on my aquasuite monitoring panel that may be useful to others.
Initially I had a separate gauge for air, fluid, & air/fluid Δt (3 gauges), but that took too much space. So I decided to combine them into one gauge.
I find it useful that having the air & fluid temps on one gauge automatically displays the analog Δt between the two. I added the digital Δt for accuracy.