That looks like a a/c or freon gauge. Below is what I'm talking about.
https://www.google.com/aclk?sa=l&ai...39142352&wl4=&wl5=pla&wl6=55136637409&veh=sem
https://www.google.com/aclk?sa=l&ai...39142352&wl4=&wl5=pla&wl6=55136637409&veh=sem
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