（1）U型气压计。U形气压计由于形状像英文大写字母U而得名，实际上是两个有刻度的连通的玻璃管。加入液体后，一头与大气连通，另一头与被测的气体连通，利用两个玻璃管中的液面差测量气压差。结合已知的大气压数值，就可以得到被测的气压值。U形气压计中常用的液体是纯水、水银、乙醇等。同样长度的U形气压计，液体的密度越大，量程越大，精确度越低；液体的密度越小，量程越小，精确度越高。所以，应该根据量程和精确度选用适当的液体。水银有毒，如果使用水银需要适当防护。

 

(1) U type barometer. U shaped pressure gauge because of the shape of the English capital letters U and the name, in fact, is the two of the scale of the glass tube. After adding a liquid, a head is connected with the atmosphere, and the other end is connected with the gas to be measured, and the difference of the liquid level in the two glass tube is measured. By combining the known atmospheric pressure values, the measured pressure values can be obtained. The liquid in the U type barometer is pure water, mercury, ethanol, etc.. The same length of U - shaped barometer, the greater the density of the liquid, the larger the range, the lower the accuracy; the smaller the density of the liquid, the smaller the range, the higher the accuracy. Therefore, it should be based on the range and accuracy of the appropriate choice of liquid. Mercury is poisonous, and if you need to use mercury, it needs to be protected.

 

（2）斜管微压计。斜管微压计可以理解为U形压力机的变形。一般情况下，U形压力计的玻璃管垂直读数，斜管微压计的玻璃管倾斜读数。玻璃管倾斜后，同样的压差在玻璃管中显示的距离较大，读数的精确度较高。所以与U形压力计比较，斜管微压计的读数精确度要高一些。

 

(2) inclined tube. The inclined tube micro pressure gauge can be understood as the deformation of the U type press. Under normal circumstances, the U - shaped gauge of the glass tube is vertical to the reading, and the inclined tube is tilted to the glass tube. After the glass tube is inclined, the same pressure difference is shown in the glass tube, and the accuracy is higher. So, with the U - type pressure gauge, the accuracy of the inclined tube is higher.

 

（3）精密微压计。精密微压计结构比较复杂，虽然也是用纯水显示压力，然而采用放大镜瞄准、螺纹微调、游标读数，可以达到更高的精确度。

 

(3) precision micro pressure gauge. Precision micro pressure meter structure is more complex, although it is also used to show the pressure, but the use of magnifying glass targeting, thread tuning, cursor reading, can achieve higher accuracy.

 

（4）弹性气压计。弹性气压计是利用物体弹性制造的气压计。弹性气压计种类繁多，应用范围非常广泛。

 

(4) elastic barometer. The elastic barometer is an air pressure gauge made of elastic objects. The elastic pressure gauge has a wide range of applications.

 

（5）压差计。压差计与压力计经常是可以通用的。有时可以测出压力计算出压差，有时又可以测出压差计算出压力。U形压力机就是净化铝材配件 http://www.jnjkjh.com/ 中一种典型的通过测压差计算压力的仪器。

 

(5) differential pressure gauge. Differential pressure gauge and pressure gauge are often used. Sometimes it can measure the pressure difference, sometimes it can measure the pressure difference. U - shaped press is a typical instrument for measuring the pressure of the pressure in the purification of aluminum parts.

 

（5）电子压力计。电子压力计一般是通过压力传感器、电子线路和显示器直接用数字显示压力的数值。

 

(5) electronic pressure gauge. Electronic pressure gauge is generally used to display the pressure by pressure sensor, electronic circuit and display.