What is a bourdon tube used for?
What is a bourdon tube used for?
The Bourdon-tube gauge, invented about 1850, is still one of the most widely used instruments for measuring the pressure of liquids and gases of all kinds, including steam, water, and air up to pressures of 100,000 pounds per square inch (70,000 newtons per square cm).
How the Bourdon tubes can be used for the measurement of pressure?
Bourdon tubes are radially formed tubes with an oval cross-section. The pressure of the measuring medium acts on the inside of the tube and produces a motion in the non-clamped end of the tube. This motion is the measure of the pressure and is indicated via the movement.
How does the bourdon tube work?
Force, pressure and flow The Bourdon gauge consists of a tube bent into a coil or an arc. As the pressure in the tube increases, the coil unwinds. A pointer connected to the end of the tube can be attached to a lever and a pointer calibrated to indicate pressure.
What is the use of bourdon tube pressure gauge?
A bourdon tube pressure gauge is a mechanical pressure measuring instrument that reads the pressure without requiring any electrical power. It is generally used for the measurement of pressure from 0.6 to 7000 bar (8 to 10000 psi).
Are Bourdon gauges accurate?
A Bourdon test gauge typically provides accuracy of 0.25 to 1.0 percent full scale.
What is bourdon tube advantages and disadvantages?
There are some advantages of bourdon tube are given below, Bourdon tube is simple in construction. It is available in wide range. It has long life. It cost is low.
Which type of fluid is used in Bourdon tube pressure gauge?
This can sometimes be difficult as the mechanical system reacts very sensitively to the pressure reading. Therefore, the needle appears to be a blur as it struggles to hold steady. There are multiple solutions to this problem, including using a glycerine or silicon filling fluid to dampen the needle movement.
Which thermometer is used in Bourdon tube?
Mechanical Pressure Gauges. The Bourdon tube (see Figure 4-22) is the sensing element used in most pressure indicating gauges. It is a closed, spiral tube, connected at one end to the pressure being sensed, with atmospheric pressure as a reference.
What is Bourdon tube made of?
The Bourdon tube is an almost rectangular or elliptical cross-section tube made from materials such as stainless steel or phosphor bronze.
Where are Bourdon gauges used?
The Bourdon and spiral tube are typically used on water systems and diaphragm units on both water and air systems. These mechanical devices can all be connected to a transmitter. The transmitter detects the mechanical change and puts out a signal proportional to pressure.
How do you calibrate a Bourdon gauge?
To calibrate the gauge, students add weights to a platform on a dead weight tester. The weights put a known force on to a piston. The piston has a known area, so students can calculate the pressure. A flexible tube containing water transfers the pressure on the piston to the Bourdon tube.
What are the Bourdon type bellows?
Bourdon tubes are made of spring-like metal alloys bent into a circular shape. Under the influence of internal pressure, a bourdon tube “tries” to straighten out into its original shape before being bent at the time of manufacture. Most pressure gauges use a bourdon tube as their pressure-sensing element.
