... 3 Level Display Controller composed of two parts: Display and Control Instrumentation and Sensor. Measured medium is water, oil, acid, ... chemical, power, metallurgy, light industry, pharmaceuticals, paper, food and water plants and sewage treatment in the areas of automatic control systems ... .B. Features.Once Sensor: composed of the float, test tube, flange and junction boxes etc. Range: S-type ≤ 4M, G ...