8 September 2026 · 4 min read
The only temperature your pizza cares about
The oven is up to temperature, the flame is roaring, and the first pizza comes out after ninety seconds with a pale base. Not because the oven was too cold, but because the stone was. Those are two different things, and exactly one instrument measures the second.
Air temperature is not stone temperature
A pizza bakes from two directions. The top gets radiant heat from the roof and the flame, the base gets conducted heat out of the stone. Those two do not rise together: the air in the dome is hot within minutes, while the stone needs ten to twenty-five to fill up, depending on the model.
Bake in that gap and you get exactly what most people get on their first attempt: a crust that looks right on top and a base that stays limp. The oven did nothing wrong. It simply was not ready.
What the Connect hub does and does not measure
The Koda 2 Max, Koda 2 Pro and Karu 2 Pro come with an Ooni Connect Digital Temperature Hub in the box. The Koda 2, Karu 2 and Karu 16 take one, but you buy it separately.
More important than who gets one is what it does. Ooni describes it as measuring two things: ambient temperature inside the oven, and, with the included probe, the core temperature of meat, poultry or fish. The stone is not on that list. For roasting it is the right tool; for pizza it measures the wrong surface.
That is why an infrared thermometer still earns its place alongside a Connect hub. They are not alternatives to each other; they read different surfaces.
How to use one
Aim it at the middle of the stone, not at the flame or the side wall — those are hotter and tell you nothing about where the pizza goes. Read, wait, read again: if the number is still climbing, the stone is not full yet.
Then measure again between pizzas. Every pizza pulls heat out of the stone, and on the smaller models it drops noticeably. That is why the fourth pizza is often worse than the first, and the only way to know when to wait.
- Read the middle of the stone, not the flame or the wall
- A number still climbing means the oven is not ready
- Measure again between pizzas, especially at 12 and 14 inches
Which ovens it matters on
All ten. The models in this comparison reach 450 to 500 °C of air temperature and need between twelve and twenty-five minutes to heat up — and none of them shows you what the stone is doing meanwhile.
It helps most on the models that cool quickly between pizzas, and it helps on the largest ones too: they have the longest heat-up time, so they are where you are most likely to start early.