Composition and technical index of diffused silicon pressure transmitter
Composition of diffused silicon pressure transmitter
When the silicon single crystal material is subjected to the action of external force and produces extremely small strain (generally higher than 400 microstrain), the electron energy level state of its internal atomic structure will change, resulting in a drastic change of its resistivity (G factor mutation). The resistance made of this material is also greatly changed, and this physical effect is called the piezoresistive effect. Using the piezoresistive effect principle, USES the integrated technology after doping, diffusion, along monocrystalline silicon slice, the characteristics of the crystallographic orientation, made into the strain resistance, constitute the huis stool bridge, using the elastic mechanics property of silicon material, all in the same silicon material anisotropy on the micro processing, is made from a integrating force sensitive and force electricity conversion testing the proliferation of silicon sensor. A complete diffused silicon pressure transmitter is formed by matching an amplifier circuit and related components to output a standard signal.
Overview
Ncs-pt105iis series diffused silicon pressure transmitter adopts internationally advanced, mature and reliable piezoresistive silicon pressure sensor, combined with advanced microprocessor technology and digital capacitance measurement technology carefully designed. The powerful function and high-speed computing ability of the internal microprocessor make it have the excellent quality of intelligence, high precision, high reliability and zero point stability. Liquid crystal display module can display pressure, temperature, current and other physical quantities; Case operation can realize zero-point migration, range setting and other functions, easy to debug on site.
NCS-PT105IIS series diffusion silicon pressure transmitter pressure transmitter support HART, FF, PA, DP can measure pressure, differential pressure, liquid level, flow and other industrial parameters, can be widely used in chemical, electric power, metallurgy and other industries.
Working principle of diffused silicon pressure transmitter
The pressure of the measured medium acts directly on the diaphragm of the sensor, so that the diaphragm produces a small displacement proportional to the pressure of the medium, so that the resistance value of the sensor changes, and the electronic circuit is used to detect this change, and convert the output of a standard measurement signal corresponding to this pressure.
Technical specifications of diffused silicon pressure transmitter
Excellent performance：
Accuracy: ±0.075% full range
Long-term stability: ±0.1% of maximum range within 12 months
Flexibility:
Pressure type selection (gauge pressure, absolute pressure)
Parameters can be set by magnetic bar, manual operator and upper computer software
Reliability:
Self-detecting function (sensor, memory, communication)
Automatic compensation function (ambient temperature compensation, sensor input linearization)
Software and hardware fault alarm function
Configuration protection: EEPROM write protection
Multi-protocol:
Supports HART, FF, and PA protocols
Provide complete DD, EDD, GSD, CFF and other electronic integration files
