96 Needle Head with spiral needles for all Porvair evaporators with gasket

Interchangeable 96 needle head with spiral needles for all Porvair evaporators.

The choice of straight or spiral needles allows the user to choose between faster dry down (spiral) and better final drying in V-well plates (straight). The spirals cause a vortex to form in the solvent, increasing the surface area and thus speeding up the rate of evaporation. Spiral needles are only suitable for use with square-well plates and larger vials.