Welch DuoSeal Vacuum Pump Physics Education Science Start Price USD 275.00 Current Price USD 275.00 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Sunday, August 17, 2008 End Time Wednesday, August 27, 2008 Location Seattle, WA See more about 'Welch DuoSeal Vacuum Pump Physics Education Science' Description Sargent Welch DuoSeal vacuum pump, extra vacuum gauge, oil and hoses for a variety of accessories. Used in my classroom for the past 20 years. Always put in clean oil in year. All classroom vacuum experiments known (about a dozen) perform perfectly. Judging from the vacuum it's at about 95 to 97% of where it should be. That could also be coming from the plate, jar or hoses. More than adequate but for the most demanding of applications. Weighs 69 lbs and is 17"x11"x8". Instruction, parts and maintenance manuals included. Model 1400, serial 140681. Hoses alone cost $100. See my other vacuum accessories. Astronomy Teaching Classroom Place a Bid!

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