Product description BST6800-DR Series Intelligent differential pressure transmitter capacitive pressure transmitter Yunnan selection by the integrated intelligent sensors and peripheral electronics parts, sensor portion includes: sensor, signal conditioning circuitry, dedicated digital processing chip, temperature sensors and other components and features of the EEPROM; peripheral electronic circuit comprising: a display circuit, EMC processing circuit composed of several parts. Pressure transmitter signal to 4-20mADC complete conversion, and has HART digital communications. BST6800-DR series are micro differential pressure transmitter differential pressure transmitter, he has a novel design principles, installation is simple, safe and explosion-proof characteristics. Products of high precision, small size, light weight, easy adjustment, long-term stability, strong unidirectional overload protection for harsh places. BST6800-DP pressure transmitter principle capacitive pressure sensor, also known as capacitance diaphragm, it works by converting the displacement of the elastic element as a change in capacitance. Pressure film as a capacitor to a movable plate capacitive pressure transmitter Supply Yunnan, it fixed the composition of variable capacitor plates. When the measured pressure variation principle Yunnan capacitive pressure transmitter, pressure diaphragm displacement and changing the distance between the plates, measuring the corresponding capacitance change, we can see the value of the measured pressure, the pressure-sensitive element Pictured two-room structure a schematic view of a concave spherical metal measured as the glass insulating layer fixed electrode, the elastic intermediate flat diaphragm being clamped as a movable electrode, thereby to form two capacitors. Entire diaphragm with diaphragm seal, full of silicone oil in its interior. Both measured by the diaphragm feel the effects of stress, pressure transmission by silicone elastic diaphragm displacement, when the pressure difference is positive pressure, the movable plate will be near the low side; on the contrary, the movable plate on the high pressure side close. Changes in the distance between the capacitor plates, cause changes on both sides of the capacitor capacitance value. By measuring the capacitance change value, calculate the size of the measured pressure.