Ozone and oxygen
Ozone output (mg/h)
Ozone output is the mass of ozone a generator produces per unit time, usually milligrams per hour (mg/h). It is a quantity, not a concentration. We rate the generator in the Standard, Deluxe and Red Light ozone steam saunas at 500 mg/h, adjustable across ten levels.
Also called mg/h, milligrams per hour, ozone production rate
What it measures
Output is a rate of production: how much ozone, by mass, the generator makes in an hour. It says nothing on its own about how concentrated that ozone is where it arrives, because the same mass spread through a larger volume of gas is a weaker mixture.
Output, flow and concentration are three different things
Three figures describe a Salvagente sauna: a generator rated at 500 mg/h, an oxygen feed held constant at 2 litres per minute, and about 47 ppm of ozone in the air inside the sauna. The first is a production rate measured at the generator. The last is a concentration measured across the whole air volume inside the sauna — a much larger volume than the delivery line, and one that is simultaneously being warmed, ventilated and consumed by contact with skin, moisture and surfaces. It also shifts with the user’s size, body structure and weight. Any one of the three on its own says very little; when you are comparing two machines, compare all three.
The ten levels
Each step on the display changes generator output by 10%, so level 10 is the full 500 mg/h and level 1 is a tenth of it. The oxygen flow does not change with the level — it stays at 2 l/min throughout.
Output is not dose
A rated output is a maximum, and output drifts down as a generator ages. Dose depends on concentration, session length, the temperature and humidity inside the sauna, and how much of the ozone decays or reacts before it reaches skin.
Why it matters here
mg/h is the headline number on almost every ozone device, and it is often quoted without the oxygen flow rate it depends on. Knowing what it does and does not describe makes comparing two machines much easier.