A dual poppet low leak variable bleed solenoid valve, including a solenoid portion with an adjustable end cap disposed through the solenoid. The vibration type MEMS switch includes a vibrating body supplied with an alternating current voltage of a predetermined frequency to vibrate in a predetermined direction; and a stationary contact point spaced apart from the vibrating body along a vibration direction of the vibrating body. In the lighting device, a liquid crystal display unit is adjacently disposed on the other principal plane, and a light-guide element is adjacent to an end face of the substrate, so that input buttons embedded into the light-guide element are illuminated. The coupon dispenser device may be mounted upon a store shelf or other like surface using conventional means. The bypass channel limits bypass gas flow to an amount that is insufficient to ignite a pilot flame at the pilot light outlet when the second channel is in fluid communication with the gas outlet. Here, owing to changing of flow cross-sectional area with opening and closing of the movable gate 5, a flow rate can be adjusted by changing a water level at the upstream side and opening area of an orifice hole and operation of the rotor blades 33 can be stopped by blocking water passing toward the vertical axis turbine 3.