日本华斯洛wasinokiki流量计GKF13S 15A  日本华斯洛wasinokiki流量计GKF13S 15A Sight Glasses - Stainless Steel, Flapper Type, Rc Threaded, GKF13S/GKF14S Washino Kiki The flapper (metal plate) is retained by spring and moves in response to the flow, allowing the flow of the fluid to be visually checked. Sight Glasses - Stainless Steel, Ball Type, Rc Threaded, GK13S/GK14S Washino Kiki Incorporates several balls with different specific gravities. The flow of fluids can be checked visually using the floating balls. Configure Now Sight Glasses - Stainless Steel, Transparent Glass, Rc Threaded, GK13S/GK14S Washino Kiki The interior is hollow. Enables visual confirmation of the color and flow of fluids. Use for liquids. Substitutes for a level gauge.