Since the dry-type ceramic capacitive pressure sensor resists corrosion, there is no transfer of intermediate liquid, and the process pressure directly acts on the front surface of the ceramic diaphragm. The ratio of capacitance and pressure of the electrode and the diaphragm electrode of the substrate changes, and the value of capacitance changes. Laser trimming, the sensor-specific signal conditioning circuit ASIC amplifies the DC voltage up to 4000mV. The built-in temperature sensor constantly measures the temperature of the medium and performs temperature compensation. Therefore, when overloaded, the diaphragm is attached to the ceramic substrate without damage. When the pressure returns to normal, its performance is not affected. Completely solve the shortcomings of poor low-range overload capacity, is the proliferation of silicon diffusion sensor products. The standardized high output has a strong anti-interference ability, with a dedicated circuit board for large-scale migration (10:1) and time stability, comes with temperature compensation, and can be in direct contact with most media.
And because the ceramic capacitance pressure sensor has no liquid transmission function, no filling liquid, no process pollution, so it has a wide range of applications in the food, pharmaceutical and other industries, coupled with dry ceramic diaphragm, it is not affected by the installation direction, The pressure transmitter produced as a sensing element is widely used in various pressure measurement applications.
The biggest characteristic of the ceramic capacitor pressure sensor dry type ceramic capacitor thick film pressure sensor is that the range can be as small as 700Pa, and the anti-overload capability can reach 10 times of the range, completely solving the problem that other types of sensors have no small range and poor overload capacity in a small range. The shortcomings, in addition to its general sensor range, its most distinctive is its positive and negative gauge function, such as: ± 7kPa and so on.
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