Abstract: A device for the continuous production or the production on demand of a wr-in-oil emulsion from a water soluble chemical and an oil when mixed with an emulsifier. The device operates at relatively low pressures on the water and the oil lines. Water based chemical and the oil are each introduced into the cell through spray nozzles. The nozzles are positioned so as to cause the two sprays to intermix just prior to impinging on the wall of the cell. The action of the sprays and the force of impinging on the wall produces shearing action in the chemicals that helps in producing an emulsion. A long tube extends from the cylindrical cell. This tube contains a passive mixing element which causes the mixed chemicals to be further mixed and to undergo additional shearing action. The effect of the tube is to assure that the chemicals are held in a mixed state long enough for a stable emulsion to be formed.