Hi where can I find a regulator switch to put on my vacuum pump ,so when its up to the required pressure it switches off automaticly and switches on when required . 

I am also looking to find a vacuum regulator switch etc to set up with a tank.

I feel that running a pump continuously is costing me too much in power use when if set up with a tank it may only run for some minutes each hour?

It would also be much quieter and save wear on the pump?