The flat film pressure transmitter is based on the mechanism that the liquid pressure is directly in proportion to the height of the liquid, and takes the disfussion silicon or the capacitance sensor and turn the static pressure into electrical signal. After temperature compensation and linear correction. Convert to 4-20mADC standard current signal output. The liquid level transmitter is composed of a fully sealed isolating membrane oil filling liquid level sensor and an instrument special circuit, which has the advantages of high measuring precision, good stability, long service life, convenient installation and so on. it is using the unique process of sealing structure, anti leakage performance is good, long-term immersion in liquid work is reliable!
it is the most commonly used sensor in industrial applications, and it is widely used in water conservancy and hydroelectric power, railway transportation, intelligent buildings, production automation, aerospace, military project, petrochemical, oil well, electric power, shipbuilding, machine tools, plumbing and other industries. the mechanism is: Medium pressure is directly acted on the sensitive diaphragm and distribution on the resistance of the sensing membrane composition of Wheatstone bridge, using piezoresistive effect of the amount of pressure conversion to electrical signals, through the electronic circuit of sensitive element of millivolt signal amplification for industrial standard signal.
Flush membrane is to prevent viscous medium jam pore pressure, or using special materials and media for better measurements and avoid the sensing chip material damage; from the surface it appears to be flush, so it is called flush diaphragm or flush diaphragm; in short, according to the particular application and the adopted way to meet the measurement or protect the sensor. .
Differential pressure transmitter is used in order to avoid the direct contact with the isolated mebrane of the transmitter. It will use the transmitter to measure membrane chamber with stainless steel capillary (about 3mm in diameter pipe, plus protection Unicom to a few meters to tens of meters at one or two (pressure or differential pressure) into the flange form measurements of film box and the middle filled with conductive medium (silicone oil), so that when the flange is connected to the device, it can be used to measure. it is applicable to isolate the high temperature medium and transmitter; measure the dielectric of transmitter sensitive element with corrosion; measured medium due to the environment or temperature and solidification or crystallization; replace the measured medium and it needs measuring rigorous purification head; suspension liquid or high viscosity media; measuring head must maintain clean and sanitation; sealing pressure measuring container.
Pressure transmitter is to achieve the control work by the increase or decrease of pressure, when the pressure drop to a point it will start work, and when the pressure is increased to a certain point it stop working.
