Electric Pump That Holds Set Level Of Vacuum?

Is there electric pumps that keep set level of vacuum? So example if there is little leak the pump automaticly pumps to keep vacuum at set level.

Yes, several.

I recently bought the LeLuv ipump smart model a few weeks ago just to try it out. I am very happy with the fit and feel of the cylinder.
The thing wasn’t too expensive, I believe it was around $100 for everything direct from the manufacture online. It came very quickly and discreetly.
The pump itself is easy to read, not loud and has cool functions. Charge from the USB cable and then you are ready to go. 3 main buttons put you in control. You can pump it up by pressing one button and then letting go when you hit the level of vacuum that you want. If/as the system looses vacuum it will automatically suck a little more continuously to maintain the level you stopped at originally for 20 minutes. If you want more, you just press the same button again and then let go when the new level that you want is reached. If you go too far you can hit the middle button to exhaust the vacuum a little or all the way out.

Now for the fun part, "smart mode". Pump it up to the level that you want and hit the 3rd button/smart button. The pump will enter smart mode and cycle up to your set vacuum level, then all the way down to 0 vacuum and right back up again, hands free for 20 minutes. When you are ready, at any time once you are in smart mode, just tap the smart button again and the pump will now cycle up to your set level of vacuum and hold it for 1 minute before going back to 0 and then taking you back up again. If you want a longer hold time just tap the smart button again it will move the hold time to 2 minutes and so on and so on. Very happy with the device so far.

The pros;
Cost effective, well made and good features.

The cons;
The readings are in Kpa, so you have to understand the math since most people here talk in Hg. The suck/release is a great sensation for masturbation as we all know and it would be fair to say from everything that I have read over the past month it is also good for growth when done on a regiment. A major drawback is that you can not set the hold times in increments other than 1 minute, 2 minutes, etc. Would be great if it could be done in 10 second intervals or similar. Obviously it doesn’t have the ability to run off of a user made program, varying the amount of vacuum and hold times over a session like the expensive top line products offer.