Abstract: A liquid dispenser employs passive driving force resulting from water level variations in the water tank of a toilet to dispense a quantitative amount of liquid into toilet bowl of each Flush is disclosed. A sanitary concentrate detergent of a selected formula is filled and sealed in a bottle and mounted to a float quantitative dispensing device in a dilute buffer chamber. Through up and down movement of a float quantitative barrel, a constant amount of concentrate liquid is squeezed and isolated into the dilute buffer chamber for dilution. The whole dispenser apparatus is hung inside. the toilet tank at a desired elevation by means of suction force of a sucking disc. A dispensing probe is provided which has an inlet/outlet submerged in the low portion of the toilet tank. When toilet is flushed, most diluted detergent in the dispenser is flushed into the toilet bowl for cleaning use, and only a small amount of the diluted detergent is retained in the toilet tank.

Abstract: A blood diluting device that can be used in an automatic hematology cell counter, including an outer tube, and an inner tube suspended within the outer tube. A blood sample to be analyzed is aspirated into the outer tube and then the inner tube, and then air is induced into the outer tube to expel the blood sample outside the inner tube. Thereafter, air is induced into the inner tube to isolate the blood sample inside the inner tube to keep the two blood samples from mixing, so that two diluted blood samples of different dilution ratios can be obtained one after the other.