Absolute pressure transmitter category: pressure transmitter series What is absolute? Absolute vacuum pressure called absolute zero pressure to absolute zero pressure is called absolute pressure reference indicates pressure, ie absolute pressure. Absolute pressure (absolute pressure) is medium (liquid, gas, steam) in which all the pressure space. Absolute pressure medium in the container, may be higher than the external atmospheric pressure can be equal to or lower than the ambient atmospheric pressure. BST6800-AP absolute pressure transmitter, also known as absolute pressure transmitter ultrasonic level meter Guangxi direct, special for vacuum measurement and control of pressure transmitter, completely solve the difficult problem of vacuum measurement, widely used in the pharmaceutical, medical device , aerospace, scientific research, Guangxi ultrasonic level meter retail, leak detection and other fields. 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. To load the diaphragm as a movable plate capacitor, which fixed plate composed of a variable capacitor. When the measured pressure changes, pressure diaphragm displacement and changing the distance between the plates Guangxi principle ultrasonic level meter, measuring the corresponding capacitance change, we can see the value of the measured pressure Guangxi ultrasonic level meter, two-room structure Photo concave spherical metal pressure-sensitive element schematically illustrating the glass insulating layer measured as a fixed electrode, clamped in the middle, elastic diaphragm as a movable electrode, consisting of 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.