... +50C 3.Environment tem:-20~+50C LZ Metal Tube Chemical Rotameter / variable area Flow MeterIntroductionLZ steel rotor pipeline flow ... and control in national security, chemical, petroleum, pharmaceutical, and light industrial. metal tube chemical rotameter The sensors of the ... fluid, i.e. Chlorine, Salt, Hydrochloric Acid, Nitric Acid and Sulfuric Acid.Data output in standard signal, it can be ...