The MicroDot™ needle valve dispenses very precise micro-deposits down to fractions of a microliter. Ideal for automated assembly processes, the adjustable needle stroke with unique calibration feature provides the ability to maintain exact deposit size when dispensing fluid. The stainless steel shutoff needle seats in the hub of the dispensing tip rather than the valve body. Having fluid cutoff occur as close as possible to the dispensing orifice minimizes dead fluid volume. Because the needle seat is part of the dispense tip itself, the seat can be renewed by simply replacing the disposable tip. Consistent microdots as small as 0.18 mm (0.007”) diameter. Unaffected by entrapped air in fluids. Drip-free shutoff.