Where is the pump to be stored is it bench top or under bench?
May be limited by pump size and acceptable noise levels.
How about pressure required?
- Common pressures required would be between 200 to 10-3 mbar - rotary vane, and diagram pumps will suit this purpose.
- If you are working on atomic physics, field emission microscopy or x-ray photoelectric spectroscopy you would be looking for working pressure between 10-3 to 10-9 mbars, of these applications specialist pumps would be needed such as diffusion, ion or triple molecular pumps would be options
What chemicals are you working with?
- Low boiling point? i.e. acetone, methlyene chloride -- less vacuum
- High boiling point? i.e. water -- stronger vacuum
Choose one that suits your needs too low or too high will prove problematic to control effectively. This will assist you in determining pump size.
Options include manual, two-point or adaptive vacuum controls
Diaphragm pumps would suit this purpose.
Will this be an issue is there as set range that is requried
Diaphragm pumps can provide the most cost-effective option