Pressure measuring devices are industrial automation instruments used to measure the pressure of gases, liquids, or steam. They are widely used in various industrial production process control, machinery equipment status monitoring, scientific research, and other fields.
Learning about common industrial pressure measuring devices can help you choose the most suitable product.
Pressure measuring instruments are industrial automation instruments used to measure gas or liquid pressure, also known as pressure gauges or manometers.
Based on the measurement principle, pressure measuring instruments are mainly divided into the following categories:
Type
Principle
Instrument Types
Liquid column type
Based on the principles of fluid statics, the measured pressure is converted into the height of a liquid column for measurement.
The pressure gauge is manufactured directly according to the definition of pressure. This type of pressure gauge has very low error and is primarily used as a reference instrument.
Common pressure gauges include piston pressure gauges, float pressure gauges, and bell pressure gauges.
Pressure is the force acting perpendicularly on the surface of an object. It is the force generated between contacting objects due to the compression of the surfaces, and its direction is perpendicular to the surfaces of the objects receiving the force. The formula for calculating pressure is: P = F/A, where P is the pressure, F is the force applied, and A is the area affected by the force. Pressure is measured as force per unit surface area.
In the International System of Units (SI), the unit of pressure is the Pascal, or Pascal (Pa), which stands for Newton per square meter (N/m²). This unit is named in honor of the outstanding French physicist Blaise Pascal.
Other common units of pressure include kilopascal (kPa), megapascal (MPa), psi (pounds per square inch, lb/in²), bar, standard atmosphere (atm), millimeters of mercury (mmHg), torr (Torr), inches of mercury (inHg), and millimeters of water column (mmH2O).
In industrial processes, we often talk about pressure types such as gauge pressure, absolute pressure, and differential pressure.
Gage pressure generally refers to the pressure measured by a pressure gauge or pressure transmitter, with its zero point being atmospheric pressure.
Absolute pressure, short for absolute pressure, is the actual pressure experienced by an object, with its zero point being a perfect vacuum.
Differential pressure refers to the relative difference between two pressures.
Pressure measurement involves using pressure measuring equipment to convert the pressure present in industrial processes into a signal that operators can interpret. This can be achieved through a pointer display, digital readout, or signal output.
Pressure is a critical parameter in industrial production. Fluid transport and changes in the physical properties of materials are all related to pressure. Furthermore, pressure is a safety factor in production design. Any equipment or device can only withstand the pressure specified by its design. Exceeding the allowable pressure range can damage the equipment or even cause an explosion, resulting in significant losses.
For example, if the pressure of a high-pressure vessel exceeds its rated value, it becomes unsafe and must be measured and controlled.
In certain industrial processes, pressure directly impacts product quality and production efficiency. For example, in the production of synthetic ammonia, nitrogen and hydrogen must not only be synthesized under a certain pressure, but the level of pressure also directly affects production output.
Regular pipelines and tanks require real-time pressure monitoring to prevent ruptures and leaks.
In addition, under certain conditions, pressure measurement can indirectly provide information about parameters such as temperature, flow rate, and liquid level.
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High temperature and high pressure type pressure measurement is an extremely harsh measurement. Usually, the temperature is higher than 80℃, or the pressure is higher than 60MPa, which exceeds the measurement range of conventional pressure transmitters. Sino-Inst supports providing you with customized solutions for various high temperature and high pressure measurement parameters. Customized case The … Read more
Pressure and flow in pipelines are two important parameters for industrial processes. Pressure or differential pressure, flow rate, and pipe diameter are all related. For example, the Bernoulli equation, the Poiseuille equation, etc., all try to sort out the relationship between pipeline flow, pressure, and pipe diameter. It is important to monitor pressure and flow … Read more
What is a Pressure Transducer? It is often called a pressure transmitter. An absolute Pressure Transducer is a device that measures the pressure relative to 0 Pa. Then, a Gauge Pressure Transducer is an instrument that measures the pressure with atmospheric pressure as the reference point. A Differential Pressure Transducer measures the difference between pressures … Read more
Pressurized air is used for multiple purposes in engineering. And air pressure sensors offer measurement and control of these important pressure levels. Digital Air Pressure Sensors are among the most successfully commercialized micro-devices. They are designed to electronically detect air, gas, or liquid pressure changes for monitoring or regulation. We’ll explore the core functionality, types, … Read more
Negative pressure/vacuum environment refers to the situation where the ambient pressure is lower than the atmospheric pressure. This environment places higher requirements on the selection and use of flow meters. In order to accurately measure the flow in a negative pressure environment, we need to choose a suitable type of flow meter. In a negative … Read more
In fluid dynamics, the relationship between pressure and flow rate is fundamental. In the meantime, calculating pressure from flow rate and flow rate from pressure helps us to understand how fluids behave in various systems, from pipelines to HVAC systems. These calculations help optimize system performance, ensure safety, and improve efficiency. In this blog post, … Read more
When the pressure in a pipe increases, does the flow rate also increase? Does the diameter of the pipe matter when calculating the flow rate? Qualitative investigation suggests a proportionate link between pipe pressure and flow rate. Assume a pipeline with a single pressure source at one end. The amount of Water flow meter that … Read more
When it comes to high-pressure applications, choosing the right flow meter is necessary for checking accuracy, reliability, and safety. High Pressure Flow Meters are perfect when measuring the flow of fluids under high pressures, such as in hydraulic testing. It is also perfect for chemical injection systems, as it withstands pressures up to 6.3MPA~42MPA and … Read more
Gauge pressure transmitter can realize high-precision measurement of gauge pressure in industrial process. The product is used to measure the level, density and pressure of liquid, gas or steam. Then the pressure signal is converted into 4mA~20mA DC analog current signal output. It can also be configured with HART\RS485, etc. Gauge Pressure Transmitters are suitable … Read more
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Sino-Inst primarily supplies electronic pressure measurement devices. These instruments measure pressure by converting changes in pressure into electrical signals. Examples include piezoresistive pressure sensors, capacitive pressure sensors, piezoelectric pressure sensors, and single-crystal silicon pressure sensors. Their output signals are typically voltage, current, or frequency, facilitating remote transmission and integration with automated control systems.
When selecting a pressure measuring instrument, factors to consider include the measurement range, accuracy level, operating environment (such as temperature, humidity, corrosion, and vibration), signal output format (analog or digital), the need for remote monitoring, and ease of installation and maintenance. If you are interested in selecting industrial pressure measuring devices or have any technical questions, please feel free to contact us.
