Industry in the selection of differential pressure transmitter

Differential pressure transmitter according to the following selection:

( 1) The precision of measuring range, need and measurement function;

( 2) Measuring instrument in the face of the environment, such as petroleum and chemical industrial environment, there are combustible ( Toxic) And explosion danger mood, had a higher environmental temperature, etc. ;

( 3) The container object structure, shape, size, container equipment accessories and all kinds of import and export of nozzle should be considered, such as, solution tank, reactor, tower boiler steam drum, cans, spherical tank, etc. ;

( 4) Other requirements, such as environmental protection and hygiene requirements;

( 5) Engineering instrument selection should be uniform, reducing varieties specifications, as much as possible to reduce spare parts, and management;

( 6) The specific requirements of the patent business process.

( 7) The physical and chemical properties and state of the measured medium, such as strong acid, strong alkali, viscous and easy to solidification and gasification condition;

( 8) The change of operating conditions, such as medium temperature, pressure, concentration of change. Sometimes considered from driving to reach a normal production parameters, the change of the gas phase and liquid phase concentration and density;

( 9) The actual process:

(1) considering the object to be tested is belong to which kind of equipment. Such as tank, tank, the tank volume is small, measuring range is not too big, the tank volume is bigger, may be more measurement range;

(2) to look at the physical and chemical properties of medium and clean degree, preferred the conventional differential pressure transmitter and buoy type liquid level transmitter, but also to select parts in contact with the medium part;

3. Such media available for some suspended solids, foam sheet flange differential pressure transmitter. Some easy to precipitate, easy to be crystallized with plug-in double flange differential pressure transmitter;

(4) the level of high viscosity of the medium and high voltage equipment level, the equipment can't opening, can choose radiation level meter to measure;

(5) in addition to the measurement methods and technical problems, there is the question of instrument.