网站转让 → 您的公司名称

导读
Introduction
压力变送器按芯体可分为扩散硅压力变送器、陶瓷压力变送器、电容式压力变送器和单晶硅压力变送器。那大家知道平时测压力用到最多的压力变送器是什么类型的吗？
The pressure transmitter can be divided into a diffusion silicon pressure transmitter, a ceramic pressure transmitter, a capacitive pressure transmitter and a single crystal silicon pressure transmitter according to the core body. So, do you know what type of pressure transmitter is the most commonly used pressure measurement?
那就是扩散硅压力变送器。扩散硅压力变送器广泛应用于石油、化工、钢铁、电力、轻工、环保等工业领域，实现对各种流体压力的表压、负压或绝压测量和控制，并且能够适用于各种恶劣危险环境及有腐蚀性介质。那么扩散硅压力变送器是怎样诞生的呢？
That is the diffusion silicon pressure transmitter. The diffusion silicon pressure transmitter is widely used in petroleum, chemical, steel, electricity, light industry, environmental protection and other industrial fields, to achieve absolute pressure or negative pressure gauge, measurement and control of fluid pressure, and can be applied to a variety of harsh and dangerous environment of corrosive media. So how did the diffuser silicon pressure transmitter be born?
扩散硅压力变送器的诞生
The birth of a diffused silicon pressure transmitter
20世纪90年代中期，美国Nova公司应用硅品石和硅品片益合两项尖端科技生产了新型扩散硅压力传感器并开发出具有精度高、重复性小、抗腐蚀的扩散硅压力变送器过程压力通过隔离膜片、密封硅油传输到扩散硅膜片上，同时参考端的压力（大气压）作用于膜片的另一端。这样膜片两边的压差产生一个压力场，使膜片的一部分压缩。另一部分拉伸，在压缩区和拉伸区分别有两个应变电阻片，以感受压力引起的阻值的变化，从而将压力信号转换为电信号。
In mid 1990s, the United States Nova company used silicon products and stone tablets siliconware Yihe two cutting-edge technology and produce a new type of silicon pressure sensor and the development of pressure diffusion silicon pressure transducer has high precision, small repeatability and corrosion resistance to diffusion silicon diaphragm by insulating diaphragm seal, silicone oil transmission, at the same time reference end the pressure (atmospheric pressure) on the other end of the diaphragm. The pressure difference between the two sides of the diaphragm produces a pressure field, which compresses a portion of the diaphragm. The other part stretches, and there are two strain resistors in the compression area and the drawing area respectively, so as to feel the change of resistance caused by pressure, thereby converting the pressure signal into electrical signal.
扩散硅压力变送器选型
Type selection of diffusion silicon pressure transmitter
好了，言归正传！小编今天就要给大家介绍下扩散硅压力变送器的选型。选型小编归纳了一下，有八大参数。
Okay, okay! The small editor is going to introduce the selection of the diffuser silicon pressure transmitter today. There are eight parameters in the selection.
01
01
被测介质
Measured medium
被测介质的物理化学性质和状态，如强酸、强碱、粘稠、易凝固结晶和气化等工况。
The physical and chemical properties and states of the measured medium, such as strong acid, strong alkali, sticky, solidification and crystallization, and gasification.
一般扩散硅压力变送器气压、油压、液压均可以测量，但是因为扩散硅芯体是316l的芯体，对于可以腐蚀不锈钢的气体、粘稠的介质及容易结晶的介质是不能测量的。因为粘稠及结晶的物质容易堵住引压孔，导致芯体不能接触到介质。
The general diffusion silicon pressure transmitter can be measured in air pressure, oil pressure and hydraulic pressure. But because the silicon core is the core of 316L, it can not be measured for gas, thick medium and easy crystallizing medium that can corrode stainless steel. Because the viscous and crystalline material can easily plug the pressure hole, the core can not contact the medium.
结晶和粘稠的介质需要用平膜压力变送器进行测量，常规的压力变送器因为有引压孔，容易被堵住，所以需要用平膜压力变送器。平膜压力变送器可以保证介质直接接触到膜片。平膜压力变送器一般用在食品、医药行业（安装方式一般是卡箍安装，压力不要超过4MPa，不然卡箍安装不住）
Crystallization and viscous medium need to be measured by flat diaphragm pressure transmitter. Conventional pressure transmitter is easily blocked because of pressure hole, so flat membrane pressure transmitter is needed. A flat film pressure transmitter can ensure that the medium is directly exposed to the diaphragm. The flat film pressure transmitter is generally used in the food and medical industry (installation is usually installed with a clamp, and the pressure does not exceed 4MPa, or the clamp can't be installed).
ps：不要用手划伤膜片哦，膜片很容易损坏！
PS: don't scratch the diaphragm with your hand. The diaphragm is very easy to damage!
泥浆及沥青这些就需要无腔平膜压力变送器（压力需要大于2MPa才可以测量）
Mud and bitumen require a flat film pressure transmitter without a cavity (pressure needs to be more than 2MPa to be measured)
02
02
压力量程
Pressure range
扩散硅压力变送器的量程一般是-0.1MPa—60MPa，根据现实压力进行选择，一般比现场最大压力再大一些就行了。但是压力其实有很多单位，比如：有客户问，16公斤压力是多少？
The range of the diffusion silicon pressure transmitter is generally -0.1MPa - 60MPa, which is selected according to the actual pressure, which is generally larger than the maximum pressure in the field. But the pressure actually has a lot of units, such as: the customer asks, 16 kilograms pressure is what?
不要紧张！请记住小编的小公式,就能应对不同的压力单位：
Take it easy！ Please remember the small formula to deal with different pressure units:
1MPa=10bar=1000KPa=145psi=760mmHg=100米水柱。
1MPa=10bar=1000KPa=145psi=760mmHg=100 meter water column.
所以当听到16公斤压力、10米高的水柱的时候不要慌张，请记住小编的公式。
So don't panic when you hear 16 kilograms of pressure, 10 meters high, please remember the formula.
请注意：客户报出压力量程的时候是表压和绝压。表压是以标准大气压为零点，绝压是以真空为零点。那么问题来了，在高原上要是选择压力变送器该注意什么？大气压零点可是不一样的呢。大量程可以忽略不计（1.6MPa以上）。
Please note: the customer reported when the pressure range is pressure and absolute pressure. The gauge is based on the standard atmospheric pressure is zero, the absolute pressure is zero in vacuum. So the problem is, what should you pay attention to on the plateau if you choose a pressure transmitter? The zero point in atmospheric pressure is not the same. A large number of courses can be ignored (more than 1.6MPa).
答案就是：请选择工艺是表压的压力变送器（有导管，将零点和大气导通）防止零点造成的误差。常规工艺是密封表压——封存一个标准大气压进去作为零点，所以选择时要注意，测10MPa以上的压力就不用了，那么小的气压不足以影响精度。
The answer is: select the process is the gauge pressure transmitter (duct, zero and air conduction) to prevent error caused by zero. The conventional process is a standard gauge - sealed storage in atmospheric pressure as zero, so the choice should pay attention to, measuring pressure above 10MPa is not so small, not enough to affect the accuracy of pressure.
03
03
温度
temperature
扩散硅压力芯体的耐温是-20-80℃，所以要测的介质温度不能过高。如果需要测80℃以上甚至是300℃左右的介质，需要怎么办呢？
The temperature of the diffused silicon pressure core is -20-80 C, so the temperature of the medium should not be too high. What do you need to do if you need to measure the medium above 80 degrees centigrade or even about 300?
1、选择加散热片，把温度给降下来
1, choose to add the heat sink to reduce the temperature
2、选择引压管，同样能达到介质降温的效果
2. The selection of the pressure tube can also achieve the effect of the cooling of the medium.
04
04
供电
power supply
传感器供电一般是DC24V，现在市面上一般会是宽量程。最低供电一般是5V，再小就做不了。
The power of the sensor is generally DC24V, and now the wide range is generally on the market. The minimum power supply is generally 5V, and it can't be done in a small way.
05
05
输出信号
output signal
4-20mA两线制电流信号    1-5V、0-5V、0-10V三线电压信号  RS485信号
4-20mA two line current signal 1-5V, 0-5V, 0-10V three line voltage signal RS485 signal
06
06
安装螺纹规格
Installation of thread specifications
常用螺纹有M20*1.5 、G1/2、G1/4、M14*1.5
Common threads are M20*1.5, G1/2, G1/4, M14*1.5
07
07
精度等级
Precision grade
常用精度等级有0.5% 、0.3% 。
The grade of common precision is 0.5% and 0.3%.
千万不要推荐0.1%精度的哦，扩散硅压力变送器0.1%精度的不够稳定，故要是需要高精度的可以推荐单晶硅的。
Do not recommend 0.1% precision, diffusion silicon pressure transmitter 0.1% accuracy is not stable, so if the need for high precision can be recommended monocrystalline silicon.
08
08
接线方式
Connection mode
1>赫斯曼接头
1> hasman joint
2>航空插头
2> aviation plug
3>直接引线
3> direct lead
三种接线方式都各有优缺点，要具体看现场选择，一般是赫斯曼的用得最多。
The three types of wiring have their own advantages and disadvantages, and it is generally the most used by hasman.
赫斯曼接头防护性较好；
Hessman joint better protection;
航空插头容易更换，接线方便；
The plug is easy to replace and the connection is convenient.
直接引线尺寸小，方便安装。
The direct lead is small in size and easy to install.
另外要是需要带显示的也是可以的。
It's also possible if you need to show it.
Ps：请注意，带显示的只能做4-20Ma输出
Ps: Please note that the display can only do 4-20Ma output
室外可选用2088壳体的扩散硅压力变送器
Diffusion silicon pressure transmitter with 2088 shells for outdoor use
另外不同情况也
In addition to different situations