I don't think Tinder always has to be about sex at all. It's so popular that there are surely people on there looking for all sorts of things.
Don't feel pressured into sex, certainly not after two dates. If they can't keep it in their pants that long they're probably not worth you bothering with, it'll only end in tears. But also remember that having sex with a new person is always going to feel like a leap into the dark, if you hang around until you're 100% comfortable you'll be hanging around forever. It's plain as day when women are using sex as a way to control us, we just don't say anything because we like to get laid, and because we lack the vocabulary. So conversely if your reticence is due to not feeling ready we understand that.
As for making it explicit, actually saying "you're not getting any tonight pal, sorry", that seems a bit artificial and transactional for me. Pace Mankytoes above, I think up to a point men like being cockteased, especially if it's well done. (Sometimes it makes you mysterious, other times just annoying.) You have to have some theatre about the whole thing, especially when you don't really know each other, same goes for in bed and the date itself. Though if you are socially awkward maybe go the direct route.
Practical advice, I think you'll probably have to do it soon or risk him giving up on you. You could try limiting it to fingering and oral, I like to build things up over time like that personally. Would you feel more comfortable if you took the reins and brought him back to your place rather than the other way round? I think the more control you feel you have when it finally happens the better.