Vacuum Sensor Adopts Advanced Technology

The vacuum sensor is produced using advanced silicon micromachining technology. It is an absolute pressure transmitter made with integrated silicon piezoresistive elements as the core element of the sensor. Due to the vacuum reference pressure cavity formed by silicon-silicon direct bonding or silicon-Pyrex glass electrostatic bonding, and a series of stress-free packaging technologies and precision temperature compensation technologies, it has the outstanding advantages of excellent stability and high precision, and is suitable for the measurement and control of absolute pressure in various situations.
Features and uses
The low-range chip vacuum absolute pressure packaging is adopted, and the product has a high overload capacity. The chip is isolated by vacuum-filled silicone oil, and the stainless steel film is used to transfer the pressure. It has excellent medium compatibility and is suitable for the measurement of vacuum pressure of most gas and liquid media that are not corrosive to 316L stainless steel. Vacuum transmission is applied to low vacuum measurement and control in various industrial environments.
Capacitive level
Capacitive level sensors are suitable for industrial enterprises to measure and control production processes during production. They are mainly used for long-distance continuous measurement and indication of liquid level or powdery solid level of conductive and non-conductive media.
The capacitive liquid level sensor is composed of a capacitive sensor and an electronic module circuit. It is based on a two-wire 4-20mA constant current output. After conversion, it can be output in a three-wire or four-wire mode, and the output signal is formed into a standard signal such as 1-5V, 0-5V, 0-10mA. The capacitive sensor consists of an insulating electrode and a cylindrical metal container containing a measuring medium. When the material level rises, the capacitance changes with the change of the material height because the dielectric constant of the non-conductive material is significantly smaller than the dielectric constant of the air. The module circuit of the sensor consists of a reference source, pulse width modulation, conversion, constant current amplification, feedback and current limiting units. The advantages of using the pulse width modulation principle for measurement are low frequency, no interference to the surrounding radio frequency, good stability, good linearity, no obvious temperature drift, etc.