Sensor technology, communication technology, and computer technology are known as the three pillars of modern information technology and the foundation of the Internet of Things, and their applications involve various fields such as the national economy. In a modern control system, sensor data is the only way to access information, direct influence, and determine the system function and performance, also known as the source of informatization and industrialization depth fusion, among them, the most widely used pressure sensors, many kinds, small make up this article will introduce you to how to choose the pressure sensor


Many problems need to be paid attention to when choosing the pressure sensor. For example, the range, accuracy, temperature characteristics, and chemical characteristics of the pressure sensor should be considered, and the operation mode of the pressure sensor is also an important issue to be considered.

For example, the situation is different when the sensor is used to measure the pressure of gas compared with that of a liquid. Gas is a compressible fluid. When increased, it will store a certain amount of compression energy. When decompressed, it will be released with kinetic energy to exert a shock wave on the sensor elastic film. The pressure sensor is required to have a large overload capacity. The liquid is an incompressible fluid. When the pressure sensor is installed, if the screw is tightened and there is no compression space, the liquid pressure can rise beyond the pressure resistance limit of the elastic film, leading to the rupture of the elastic film. As this situation occurs frequently, the pressure sensor is also required to have a greater overpressure capacity. When the working environment of the pressure sensor is bad, such as large vibration, impact, and large electromagnetic interference, more strict requirements are put forward for the sensor. Not only the overpressure capacity is strong, but also the mechanical seal is reliable, anti-loosening, and the sensor is installed correctly. The leads, pins, and external wires of the sensor itself shall be electromagnetic shielded and well-grounded. In addition, the compatibility of the pressure sensor with the measured flow medium should be considered. For example, the elastic membrane structure of the sensor should be separated from the corrosive medium. At this time, the stainless steel corrugated sleeve sensor is adopted. The silicon oil is used as the pressure transmission medium in the sensor. When the sensor detects the pressure of flammable and explosive media, the small excitation current is used to prevent the spark and Mars from being generated when the elastic film ruptures, and to increase the pressure resistance of the pressure sensor coat.

GE Fanuc	Bently Nevada	Siemens
IC695PSA040	3500/42	16267-1/4
IC670MDL241	TK3-2E	W89070-U2321-A6
UR9EH	991-25-70-01-01	U-55N
IC693CHS397C	991-01-XX-01-01	U-08B
369-HI-R-M-0-0-0-E	990-08-XX-01-00	TI435-CPU
IC698CPE010	990-05-70-01-01	T89620-E3298-F050/MS-DOS
DS3800HISA1A1A	990-05-50-02-01	T89120-E3087-H
IC693ALG221	9200-01-05-10-00	SSN-BG89A010563
DS200DCFBG2BNC	88199-01	SMP-E431-A6
IS200SPIDG1ABA	88194-01	S MAR7517679
IC698CRE020CA	88149-01	S MAR5515395
IS200VR0CH1BBR	84933-02	RMS-TSG-TZ-C
IC697CPX935-FD	81228-01（3300）	RMS-TIG-TZ-C
IC200MDL750H	79748-01	RD63F200
IC697CPU781	79532-01	R15E02A186
V7768-320000	79522-01	QLSAMBAN
IC200ALG322	78462-02	QLCCM24AAN A5E00282046 A5E00282046/06
IC200PWR101	78462-01	QLCCM22AAN 16418-31
IS230STCIH6A	75619 302-EL30	QLCAIAAN
IC670ALG630	71573 306-EL30	PS02-3005
IS200EDCFG1A	47042 308 EL30	PS02-3001V5.00
IS210AEPSG1A	3500/94	E10433-E0308-H110