Delo-Dot PN3 pneumatic microdispensing valve is said to reduce minimum dispensing amount by a factor of three versus its predecessor, and some products such as unfilled acrylates can be jetted 

permanently in amounts as low as 0.009mg. Optimized fluid system geometry permits a maximum dispensing volume of almost 14mg, to cover a large field of applications. Two different piston types, one for very small dispensing amounts and one for small to medium drop sizes. Both configurations provide an operating frequency of up to 330 drops/sec. Eases handling by means of a rotary wheel, which sets the stroke of the piston by selecting one of five different locking positions without any additional tool. Respective position is indicated by an LED, thus making it easier to check the stroke setting, in particular after integration into a production system. Has no open electric contacts and is screwed onto the valve, which facilitates disassembly for cleaning and maintenance.

Delo Industrial Adhesives, www.delo-adhesives.com