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What is a capsule pressure gauge?
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3 days ago · Instead, the comment requests that the gauge should indicate container pressure or the amount of liquid in the container. (Response 32) We appreciate the comment of support and agree that the gauge would be subject to the testing provisions for components, as the gauge is part of the container closure system.
- Capsule Pressure Gauge Working Principle
- The Capsule
- Properties of The Capsule Gauge
- Applications with Capsules
- Measuring Range of Capsule Pressure Gauges
- Absolute Pressure Sensors
- Relative Pressure Sensors
- Differential Pressure Sensors
- Datasheet Template
The sensing element of a capsule pressure gauge consists of two corrugated diaphragms welded together at their periphery to form a capsule. The pressure to be measured is introduced into the capsule via an opening in the center of the first diaphragm. The center of the second diaphragm is connected to the transmission mechanism so that the deflecti...
As you can see in the illustrations below, there are two types of capsules: convex and nested. A convex capsule is formed by attaching two convex diaphragms opposite to each other. A nested capsule consists of a convex and a concave diaphragm, also secured to one another along their periphery. If the process pressure is applied along the exterior o...
With flat diaphragms, only very small deflections can be achieved since the elastic limit is reached quickly. Therefore, diaphragms are usually corrugated. These corrugations permit a larger deflection of the diaphragm before the elastic limit is reached. A capsule having a diameter of 50mm (2 inches), consisting of two corrugated diaphragms which ...
Since the pressure chamber of a capsule is not self-draining, it cannot be used for liquids. Capsules are therefore only used for the measurement of gas pressures. The ability to measure low pressures with diaphragms, along with the property of the double sensitivity of a capsule, ensures that capsules are the ideal sensors for use in a barometer. ...
Capsule pressure gauges are suitable for the measurement of very low negative and positive pressures ranging from 0 – 0.5 mbar to 0-1000 mbar with accuracy classes of 0.1 to 2.5. They can measure both relative and absolute as well as differential pressure.
In absolute pressure sensors, the pressure chamber of the capsule is evacuated and hermetically sealed. The capsule is mounted in a sealed housing. The process pressure is then introduced into the sealed housing through a process connection and applied to the exterior of the capsule. Since the process pressure is compared to a nearly perfect vacuum...
For the measurement of relative pressures, the process pressure is applied to the inside of the capsule. The capsule thus has a process connection in the middle of a diaphragm through which the process pressure is introduced. The reference pressure, being the atmospheric pressure, is on the exterior of the capsule. The measurement of relative press...
If the above relative pressure measurement is provided with a second connection and the enclosure at the height of the link is sealed with a bellows, two different pressures can be compared with each other. The resulting pressure, which is measured by the capsules, is the differential pressure of the two process pressures.
An easy configurable Excel template is available for specifying capsule pressure gauges. This pressure gauge datasheetis designed to define capsule pressure gauges for all kinds of applications. Datasheet templates for other types of instruments can be found in the datasheet library. Related topics
Pressure Gauges with Capsule Sensor Principle. The capsule element comprises two circular-shaped, convoluted membranes sealed tight around their circumference. The pressure acts on the inside of this capsule and the generated stroke movement is shown by a pointer as measurement of pressure.
Capsule Pressure Gauge. In this type of pressure gauge, two corrugated diaphragms are welded together at their periphery to form a capsule. This capsule is the main element in sensing the pressure. A hole is present in one of the diaphragms in the center which lets the medium enter. The diaphragms expand or contract upon the application of ...
With a capsule pressure gauge you can measure a positive pressure up to 600 mbar and negative pressure up to 600 mbar. The accuracy of the gauges is at 1,6% or 2,5 % of the upper range value.
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Capsule Pressure Gauge. Capsules as pressure measuring devices are used normally for low-pressure applications. A capsule is formed by joining the peripheries of two diaphragms through soldering or welding. Used in some absolute pressure gages.
The model 632.50 and 633.50 capsule pressure gauges are completely manufactured from stainless steel and are therefore particularly suited for applications in the process industry. They are based upon the proven capsule measuring system.
