Hydroxypropyl methyl cellulose is industrial grade HPMC, mainly used as dispersant in the production of polyvinyl chloride, which is the main auxiliary for the preparation of PVC by suspension polymerization. In addition, it is used as thickener, stabilizer, emulsifier, excipient, water retention agent and film-forming agent in the production of petrochemicals, building materials, paint remover, agricultural chemicals, printing ink, textile printing and dyeing, ceramics, paper making, cosmetics and other products. And in the process of hydroxypropyl methyl cellulose production process, the Variable area flowmeter is needed to intermediate materials flow measurement, because the Variable area flowmeter can be widely used in complex, harsh environmental conditions and a variety of media flow measurement, so in the process of automatic control of hydroxypropyl methyl cellulose, the use of chlorine gas measurement has obvious advantages. Float in the fluid and buoyancy under the action of upward movement, and float weight balance, through the magnetic coupling to the dial indicates the corresponding flow, can be with output 4-20mA electrical signal. In the case of accurate measurement and can save material costs for the user, cost-effective.
