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（1）U型氣壓計。U形氣壓計由于形狀像英文大寫字母U而得名，實際上是兩個有刻度的連通的玻璃管。加入液體后，一頭與大氣連通，另一頭與被測的氣體連通，利用兩個玻璃管中的液面差測量氣壓差。結合已知的大氣壓數值，就可以得到被測的氣壓值。U形氣壓計中常用的液體是純水、水銀、乙醇等。同樣長度的U形氣壓計，液體的密度越大，量程越大，精確度越低；液體的密度越小，量程越小，精確度越高。所以，應該根據量程和精確度選用適當的液體。水銀有毒，如果使用水銀需要適當防護。

 

(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）斜管微壓計。斜管微壓計可以理解為U形壓力機的變形。一般情況下，U形壓力計的玻璃管垂直讀數，斜管微壓計的玻璃管傾斜讀數。玻璃管傾斜后，同樣的壓差在玻璃管中顯示的距離較大，讀數的精確度較高。所以與U形壓力計比較，斜管微壓計的讀數精確度要高一些。

 

(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）精密微壓計。精密微壓計結構比較復雜，雖然也是用純水顯示壓力，然而采用放大鏡瞄準、螺紋微調、游標讀數，可以達到更高的精確度。

 

(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）彈性氣壓計。彈性氣壓計是利用物體彈性制造的氣壓計。彈性氣壓計種類繁多，應用范圍非常廣泛。

 

(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）壓差計。壓差計與壓力計經常是可以通用的。有時可以測出壓力計算出壓差，有時又可以測出壓差計算出壓力。U形壓力機就是凈化鋁材配件 http://www.jnjkjh.com/ 中一種典型的通過測壓差計算壓力的儀器。

 

(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）電子壓力計。電子壓力計一般是通過壓力傳感器、電子線路和顯示器直接用數字顯示壓力的數值。

 

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