压力变送器属于什么类仪器？ _绝对压力变送器和压力变送器的区别

压力变送器属于什么类仪器？1．表压型压力变送器：
表压型压力变送器是以当地大气压作为参考零点的压力变送器。

1.Surface pressure transmitter:
Surface pressure transmitter is a pressure transmitter with local atmospheric pressure as reference zero.

2．绝对压力变送器：
绝对压力变送器是以真空度为参考零点的一款压力变送器。在使用过程中，传感器的参考零点可以随地点地域的变换而自动调整无需校正。外形与表压型压力变送器无二致。

2.Absolute pressure transmitter:
Absolute pressure transmitter is a pressure transmitter with vacuum as reference zero.In the process of using,the reference zero of the sensor can be adjusted automatically with the change of location and region without correction.The shape of the pressure transmitter is identical to that of the surface pressure transmitter.

3．差压变送器：
差压变送器是测量两压腔之间所受压力差值的压力变送器，差压变送器分别有“+”和“-”两个压腔。分别承接两作为比较值的压力，通常把压力较大的一端作为“+”压腔。需要特别注意的是在订购差压传感器时，请注意差压变送器特有的一项参数----耐受静压。在应用过程中，高静压低差压的使用现场屡见不鲜。订购的差压变送器所受静压不宜超出该差压变送器的耐受静压值，否则，很容易损坏。

3.Differential pressure transmitter:
Differential pressure transmitter is a pressure transmitter which measures the pressure difference between two pressure chambers.Differential pressure transmitter has two pressure chambers'+'and'-',respectively.Take two pressure as the comparative value separately.Usually,one end of the larger pressure is used as a'+'pressure chamber.It should be noted that when ordering differential pressure transducers,please pay attention to a specific parameter of differential pressure transducers-static pressure tolerance.In the application process,high hydrostatic pressure and low differential pressure are common in the field.The static pressure of the ordered differential pressure transmitter should not exceed the tolerance static pressure value of the differential pressure transmitter,otherwise,it is easy to damage.

4．投入/插入式液位变送器：
液位变送器分为投入式和插入式两种，两种形式无二致，都是把所受压力转换为液深。当水深为1m时，变送器所受压力为10KPa,订购此类传感器时就注意：
（1）所测量液体密度应告知生产单位。
（2）当测量介质具有腐蚀性时应告知生产单位。
（3）当测量介质温度超出-10℃和60℃时就告知生产单位。

4.Input/insert level transmitter:
The level transmitter can be divided into two types:the input type and the insertion type.The two forms are identical.They all co