I have this sentence where I am not sure about two things:
"after launch" – is that correct when I talk about a device?
"since then" – is that correct with the past simple tense?
I'm sorry for the lack of the context. The values are provided to an upstream system, hence I used "provided". It is a device for measuring of the water pH - so I thought a device can be "launched". When you start it, it provides the upstream system with the first (or initial) value in 100-200 ms. After that, it continuously provides updates.
The first value is obtained 100-200 ms after launch and is continuously provided in the defined interval since then.