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Directory of pressure sensors is a device, physical parameters of which reshape with the insist upon of the environment (solvent, gas, steam). In compressing sensors, vexation of the atmosphere is converted into standardized pneumatic, electrical signals or digital code.

According to directory of put the screws on sensors, miniature pressure sensors consists of a principal urgency transducer, which included delicate detail - the receiver constrain, the copied signal processing circuit, which differs in organization of hull parts, including the impenetrable union of the sensor and the complain about of barrier against external influences and the produce device information signal. The ranking differences between some of the other devices are the limits of measurement, the spry and frequency ranges, the correctness of exigency recording, passable operating conditions, avoirdupois and magnitude characteristics, which depend on the theoretically of converting the pressure into an electrical signal: heritage gauge, capacitive, inductive, resonance, ionization, and piezoelectric other. These are the main differences in principles of work of different manufacturers of albatross sensors.
According to wrench assess method the sensing elements of sensors are based on the principle of the mutation in refusal with strain gages glued to the pliable segment that deforms high pressure. Numerous manufacturers of urgency sensors take this method.
In the capacitive method capacitive transducers use the method of changing the capacitance of the capacitor when the distance between the plates. Known ceramic or silicon capacitive piezo pressure sensors and the primary transducers made using an elastic metal diaphragm. The affliction changes with the electrode membrane is bent and a change in capacitance. The locale of ceramics or silicon, the room between the plates is almost always filled with grease or other organic liquid. Directory of strength sensors says that there is a disadvantage of this method - the nonlinear dependence of the capacitance on the applied pressure.
The resonance method is based on variation of the resonance frequency of the oscillating bouncy feature in the deformation of its coercion or pressure. This explains the sharp dependability of the sensor and sharp manufacture characteristics of the device. The disadvantages are the special characteristics of metamorphosis compressing, a meritorious answer heretofore, impotence to carry out measurements in hostile environments without loss of preciseness of reading.
Induction tension sensors are based on the detection of turn currents (foucault currents). The sensing element consists of two coils, each separate near metal screen. Transducer measures the displacement of the membrane in the absence of distant contact. In an electrical signal generated by the whorl AC so that the cost and send away circles is at uniform intervals. In suitcase of deviation of the membrane creates a current in the fixed-core spiral, which changes the inductance of the system. Displacement quality of the foremost coil makes it viable to remodel make into a standardized signal, on the parameters at once consistent to the applied pressure.