... available for order, in order to measure corrosive fluid, i.e. Chlorine, Salt, Hydrochloric Acid, Nitric Acid and ... etc. Widely used in chemical, petroleum, metallurgy, coal, building materials, paper making, environmental protection industry and so on. Ultrasonic can ... spread effective in lots of occasion, Such as: storage tank, materials trough, pool, well, Drains, measuring boxes, granaries, silo, ...