The inverted needle is available in a number of sizes. Note that 22g is the standard size and is in stock. All other sizes require 2-3 day lead time for fabrication.
The inverted needle is used for producing sessile drops or in conjuction with the ramé-hart Environmental Fixture with Quartz Cell or Environmental Chamber with Quartz Cell for liquid/liquid, inverted pendant drop, inverted sessile drop, and interfacial tension studies.
When used with the Automated Dispensing System, the needle fixture is required.