Como funciona um manômetro? Tubo Bourdon vs. elemento de diafragma

Pressure gauges are pressure measuring instruments with resilient measuring elements that have been used millions of times in various industrial applications. Depending on the gauge's application area, Bourdon tubes or diaphragms are used as pressure elements. In a Bourdon tube pressure gauge (https://bit.ly/3lhl1at), the pressure is measured directly inside the gauge through the Bourdon tube, a curved C-type tube with a non-circular cross-section. As a result of the "tube travel," i.e., the movement of the Bourdon tube, the pressure is transmitted through the movement to the pointer to indicate the pressure. Bourdon tube pressure gauges are very versatile and can be used in most applications. Bourdon tubes have the following advantages compared to diaphragm elements: They cover small pressure ranges from 0 to 0.6 bar up to high pressure ranges from 0 to 10,000 bar. They allow accuracies down to class 0.1 of calibration regulations. They are easier to produce. They can be easily connected and sealed with pressurized components. Depending on the material and pressure load, they are welded or bolted. Diaphragm pressure gauges (https://bit.ly/3A9TKe8) are used when Bourdon tube pressure gauges reach their limits. For diaphragms, the flexible deflection of the diaphragms loaded on one side, which are fixed to the edge, is determined as a reference value. This deflection is converted through a pointer mechanism into a rotary motion. Diaphragms have high mechanical stability due to their shape and fixation and are therefore less sensitive to vibration. Diaphragm pressure gauges are especially used to measure low pressures. Due to the large area of ​​the diaphragm, pressures from 0 ... 16 mbar can be measured (with capsule pressure gauges as a special type of diaphragm pressure gauge, 0 ... 2.5 mbar). Unlike Bourdon tubes, diaphragms can be easily protected against overload. Overload protection is achieved, for example, through a specially shaped diaphragm against which the diaphragm element can rest. Additionally, diaphragm pressure gauges are used with highly viscous, contaminated, or crystallizable media, since the diaphragm can be supplied with various coatings, such as PTFE, gold, and Hastelloy. A diaphragm pressure gauge with an open connection flange also prevents clogging of the pressure channel, since the diameter is larger. 📖 You can find interesting posts on the following topics on the WIKA blog: Bourdon tube pressure gauge – Operating principle: https://bit.ly/3oDcUXS Overload protection of Bourdon tube pressure gauges: https://bit.ly/2WLrmBn Advantages of diaphragm sensor pressure gauges: Low pressure measurement https://bit.ly/2YinZCq Advantages of diaphragm sensor pressure gauges: Protection against high overpressure https://bit.ly/3BjRMJI 🛒 Buy pressure gauges directly from our WIKA online store: Bourdon tube pressure gauges: https://bit.ly/3mrINQg Diaphragm pressure gauges: https://bit.ly/3ixuw3m Capsule pressure gauges: https://bit.ly/3BfocFa _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Follow us on our social media: 📺 YouTube:    / wikagroup   🎯 LinkedIn:   / wikagroup   ▬ Video Content ▬▬▬▬▬▬▬▬▬▬▬▬ 00:00 – Introduction 00:04 – Selecting pressure gauges 00:22 – How does a Bourdon tube pressure gauge work? 00:44 – How does a diaphragm pressure gauge work? 00:54 – Diaphragm vs. Bourdon tube pressure gauge 01:20 – Advantages of diaphragm pressure gauges 02:08 – The decision between Bourdon tube or diaphragm pressure gauges