Pressure Gauge Design and Operation Explained for Your Understanding

Posted on: 16 October 2020

Pressure gauges are mechanical devices used to measure and keep track of a system or vessel's internal pressure. The gauges come in different styles, materials and sizes to meet your needs. The pressure gauge you need to monitor the pressure level of a pipe will be different from the one used on a storage tank. The amount of pressure and potential risks of explosion dictate the differences between the two types of pressure gauges. It helps to understand the design and operation parameters of pressure gauges before choosing one for your applications. Here is a discussion that will help you with that.

Pressure Gauge Cases

The case is one of the essential elements in the design of a pressure gauge. They are the first line of protection for the instruments inside the gauge. The combination of the configuration and material used to make the case depends on the gauge's specific application. Harsh working conditions require a rugged build for the pressure gauge case. You can rely on materials such as stainless steel, aluminium and polypropylene for such conditions. The aluminium and steel used for such cases are suitable for industrial applications.

Pressure Gauge Ring and Window

You need the window to view the measurement given by the pointer. The window also protects the gauge's dial face and pointer, ensuring that secondary elements don't lead to a wrong reading. Normally, a special ring holds the window in place. The ring sits in place courtesy of a snap or screw that holds it in firmly. When choosing, go for laminated glass, clear glass or reinforced plastics that allow clear vision even as they age. Your best selection of ring styles includes bayonet, hinged, threaded or friction. Most of this will depend on the type of case that you have.

Pressure Gauge Operating Principle

Typically, a pressure gauge comes with a bourdon tube that has a sensing element. When the bourdon element encounters pressure, it flexes out and the resulting movement transmits as measurement on the pointer. The pointer is visible through the window and a marked scale lets you know how much pressure the vessel has.

Pressure Gauge and Environmental Conditions

There is no doubt that the immediate environment influences the working of pressure gauges. Waterproofing and condensation are an excellent example of the things that can affect your gauge. You must address this through hermetic sealing of your gauges. More importantly, the construction of your case must support such sealing before you proceed with installation.

For more information, contact a pressure gauge supplier in your area.


Checking fair weights and measures

We have a small artisanal food supply company. We have to make sure that our products are all up to the weight we state on the pack and hopefully not too far over. Our production process isn't quite as precise as the bigger companies, but we still have to make the same standards. I have been working with the weights and scale technician to make sure we get quick and accurate weights on our products. That way we can know we are giving the customer exactly what they are after. This blog is for other small scale food producers trying to get their products weighed accurately.

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