That is an analog sensor. It’s TTL (uses 5vdc as control power) it is the sensor I designed the circuit I posted earlier.
It puts out 0-5vdc for 0-29 inches of vacuum.
The switch in the link I posted earlier is what the aftermarket add on vacuum pump manufacturers are using. It’s a simple switch using a diaphragm with a spring adjustment to be able to set the on/off vacuum setting. Not sure if the ability to set the hysteresis.
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