... .10W-20W 4.High precision 5.AC220V/50Hz Smart pumpsFeaturesVacuum instrument products are smart, desktop vacuum pumps, flow, vacuum adjustable, ... by smart pump must be free from corrosion, not oil points, but allows rich in water vapor. medium temperature must ... °C.not allow foreign objects into the pump.3. Smart pump work environmentAmbient temperature: 0 ~ 40 °C, relative humidity: ≤ 75%, the ...