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El Cheapo Vacuum Pumps

Original poster: Mddeming@xxxxxxx
Hi All,

Anyone wanting an inexpensive first stage vacuum pump that can get down to 30-40 mmHg might want to consider this item from Harbor Freight Tools:
Item No. 92475
Central Pneumatic
Air Vacuum Pump with R134A Connector

Regular Price $16.99
Sale Price $11.99

Their on-line catalogue is at:

Since Tesla described a number of his experiments with partial vacuum as being in the 50-150 mmHg range, this should put most experimenters in the ballpark.


Matt D.

I have no financial or personal interest in Harbor Freight Tools, Its suppliers or any associated companies, and this is not a compensated endorsement.