Teplo Pressure Transmitter adopts high precision and high stability diffusion silicon and ceramic pressure sensitive chip and will be converted into 4 ~ 20mADC, 0 ~ 10mADC or 0 ~ 5VDC standard signal by high-reliability amplifier circuit . The high quality of the transmitter, superb packaging technology and a complete assembly process ensure the excellent quality and performance of the product. Pressure transmitters can be divided into capacitive pressure transmitter, diffused silicon pressure transmitter, ceramic pressure transmitter and strain gauge pressure transmitter. Tetro next to introduce different pressure transmitter of different principles Capacitive pressure transmitter When the pressure directly on the surface of the measuring diaphragm, the diaphragm produces a small deformation, measuring the diaphragm on the high-precision circuit will transform this tiny deformation into a highly linear proportional to the pressure, and the excitation voltage is also proportional to the voltage Signal, and then use a dedicated chip to convert this voltage signal into an industry standard 4-20mA current signal or 1-5V voltage signal. As the measuring diaphragm with a standardized integrated circuit, the internal linear and temperature compensation circuit, so you can achieve high accuracy and high stability, the transmission circuit using a dedicated two-wire chip, you can guarantee the output of two-wire 4-20mA current signal , Convenient on-site wiring. Diffusion silicon pressure transmitter The pressure of the measured medium acts directly on the diaphragm of the sensor (stainless steel or ceramic), causing the diaphragm to produce a micro-displacement proportional to the medium pressure, changing the resistance of the sensor and detecting this change with electronic circuitry and The conversion outputs a standard measurement signal corresponding to this pressure. Ceramic pressure transmitter Pressure directly on the front surface of the ceramic diaphragm, the diaphragm produces a slight deformation, thick film resistors printed on the back of the ceramic diaphragm, connected into a Wheatstone bridge (closed bridge), due to piezoresistive piezoresistive effect , So that the bridge produces a high degree of linear pressure proportional to the pressure, and the voltage is proportional to the excitation voltage signal. Strain gauge pressure transmitter A strain gauge is a sensitive device that converts a strain change on a DUT into an electrical signal. It is one of the major components of a piezoresistive strain gage. Resistance strain gauge is the most widely used metal strain gauge and semiconductor strain gauge two. Metal resistance strain gauges and filiform strain gauges and metal foil strain gauge two. Strain gages are usually adhered to each other by a special adhesive to produce a mechanical strain matrix. When the stress on the substrate changes, the strain gages also deform together to change the resistance of the strain gauge so that The voltage applied to the resistor changes.