Vacuum System Pressure Control Switch Pump Regulator Attenuator:Full Range from Upto 29 inch Hg, Adjustable Range and Span Differential Pressure: Amazon.com: Industrial & Scientific
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Series MVS | Miniature Vacuum Switch is a compact, lightweight, and adjustable which is designed for OEM applications. Other applications include HVAC, dairy systems, medical, office equipment, and pump control. | Dwyer Instruments