Thanks Steve for the quick reply.

Next Question. -- What controls the motor shutoff ?

When the pump is commanded to generate vacuum is the motor operated by some sort of an internal timer or will it keep pumping until a preset level of vacuum is reached. My application has a much larger volume that needs to be evacuated. It will take longer for this little pump to do it. So if it continues to pump until vacuum is acheived that would be really nice. Same goes for pressure.

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I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k