I set up both gauges in Sudan's tank last night.
It is a 40 gallon breeder glass tank with screen top.
I covered the glass over the under tank heater with some newspaper
and covered with substrate
Water bowl is a small one to keep humidity low.
Probes are in both hides...hot and cold sides.
I have clear contact paper covering the screen on the top of his tank.
I have a 75W red heating lamp on the hot side and there is a hole cut out
for it. Also two corners, about an inch worth, cut out on cold side for air flow. I also have paper covering all three sides on the outside for privacy but it also helps with the temps.

Today at 3:30pm the gauges read as follows:

Gauge on hot side:
83.5 ambient air on hot side
80.8 in hide on COLD side
53% humidity on hot side

Gauge on cold side:
78.1 ambient air on cold side
89.6 in hide on HOT side
63% humidity on cold side

So, if I am to keep the Hot side at at least 90 degrees F then I am just about there in the HOT hide at 89.6
But my ambient air isn't hot enough at 83.5, so that has to be raised.
So I think I am going to put a 100W red heating lamp with a dimmer and
work with it to get the ambient air up to a minimum of 90%.

As to cold side I think 80.8 is ok in the Cold hide.
Ambient air should be another 2 degrees higher but the only way I can see that happening is hoping it will go up from the heat lamp on the Hot side.
But the humidity is 10% higher on the cold side than the hot side.
Is 53 to 63 an ok humidity range?

The water bowl is directly in the middle at the front glass between the two thermostat/humidity gauges. The humidity should be higher on the HOT side, shouldn't it?
Now, this tank is in my bathroom as it is the only place I can quarantine Sudan for awhile away from the other snakes.
It is sitting on my long counter. The cold side is the right side which is next to my sink. Could that make a difference? Can it pick up humidity from water in pipes?
Or the other alternative thought is that the one gauge has a defective digital number as it is exactly 10 off and you know how the gauges form numbers.
5 and 6 are just one line off.

So what do you all think about the temps at 3:30pm and do you agree, disagree, want to comment, whatever on what I "think" I should do?
Or what do you think I should do?
I am working towards 90 degrees F as my goal. Should I go higher?