Figure 9 A single 48-channel solenoid valve-controlled microliter-volume reagent dispenser is shown. The linear array of 48 orifices is at the bottom. The electrical connections for control of the solenoid valve for each orifice are at the top. The upper left valve controls influx to the hydraulic line connecting all 48 orifices, whereas the valve at the upper right regulates efflux. Figure 10 Filling and dispensing from the linear array. The common hydraulic line is connected to the supply volume of liquid to be dispensed at left while the right line goes to a disposal container. The common hydraulic line is subjected to a constant hydrostatic pressure. With both left and right valves open, the common line is filled with fluid to be dispensed. The outlet valve is closed to equalize pressure across the common line. The solenoid valves are then opened to enable dispensing. Volume is controlled by the duration for which the orifice valves are open.

DOI link for Figure 9 A single 48-channel solenoid valve-controlled microliter-volume reagent dispenser is shown. The linear array of 48 orifices is at the bottom. The electrical connections for control of the solenoid valve for each orifice are at the top. The upper left valve controls influx to the hydraulic line connecting all 48 orifices, whereas the valve at the upper right regulates efflux. Figure 10 Filling and dispensing from the linear array. The common hydraulic line is connected to the supply volume of liquid to be dispensed at left while the right line goes to a disposal container. The common hydraulic line is subjected to a constant hydrostatic pressure. With both left and right valves open, the common line is filled with fluid to be dispensed. The outlet valve is closed to equalize pressure across the common line. The solenoid valves are then opened to enable dispensing. Volume is controlled by the duration for which the orifice valves are open.

Figure 9 A single 48-channel solenoid valve-controlled microliter-volume reagent dispenser is shown. The linear array of 48 orifices is at the bottom. The electrical connections for control of the solenoid valve for each orifice are at the top. The upper left valve controls influx to the hydraulic line connecting all 48 orifices, whereas the valve at the upper right regulates efflux. Figure 10 Filling and dispensing from the linear array. The common hydraulic line is connected to the supply volume of liquid to be dispensed at left while the right line goes to a disposal container. The common hydraulic line is subjected to a constant hydrostatic pressure. With both left and right valves open, the common line is filled with fluid to be dispensed. The outlet valve is closed to equalize pressure across the common line. The solenoid valves are then opened to enable dispensing. Volume is controlled by the duration for which the orifice valves are open.