I have for sale a New Unused PIAB EVS 100 vacuum switch with Option 1591 which lets you adjust the deadband. These retail for a couple of hundred dollars. I will let this go for $55 shipped anywhere USPS Priority Mail box rates apply. This is a top of the line vacuum switch rated at 15amps, good for larger pumps.
This vacuum switch wont sputter your pump like the joewoodworker ones that have a large variable deadband (which he calls a “vacuum pressure controller” which is really the wrong term, they are called Vacuum Switches in industry). You can dial the deadband on these down to 1"Hg. You set the range you want your pump to turn on or turn off.
Just run your power wire through this switch to control electrical power to your pump based on the vacuum pressure you desire.
