How do you choose a pressure transmitter?
There are many types of pressure transmitters. When using it, it is necessary to select the appropriate type of pressure transmitter according to the needs. The main factors that need to be referred to when selecting the pressure transmitter are:
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First determine the maximum value of the measured pressure in the system. Generally speaking, it is necessary to select a pressure transmitter with a pressure range that is about 1.5 times larger than the maximum value.
Viscous liquids and mud will block the pressure port. Solvents or corrosive substances will not damage the materials in the transmitter that are in direct contact with these media. The above factors will determine whether to choose a direct isolation film and a material that is in direct contact with the medium.
The factors that determine the accuracy of pressure transmitters are nonlinearity, hysteresis, non-repeatability, temperature, zero offset scale, the influence of temperature, etc. The higher the accuracy, the higher the price.
Usually a transmitter will calibrate two temperature ranges. One of the temperature ranges is the normal operating temperature, and the other is the temperature compensation range. The normal operating temperature range refers to the temperature range when the transmitter is not damaged under working conditions. It may not meet the performance specification of its application when the temperature compensation range is exceeded.
Digital output in mV, V, mA and frequency output. Which output to choose depends on many factors. Including the distance between the transmitter and the system controller or display. The presence of “noise” or other electronic interference signals. Whether an amplifier is required, amplifier location, etc.
The most economical and effective solution is to use mA output transmitters for many OEM devices with short distances between transmitters and controllers.
If the output signal needs to be amplified, it is best to use a transmitter with built-in amplification.
For long-distance transmission or strong electronic interference signals, it is best to use mA level output or frequency output.
If in an environment with high RFI or EMI indicators, in addition to selecting mA or frequency output, special protection or filters should also be considered.
The type of output signal determines what excitation voltage to choose. Many transmitters have built-in voltage regulation and therefore have a wide range of supply voltages. Some transmitters are configured quantitatively and require a stable working voltage. Therefore, the working voltage determines whether to use a sensor with a regulator. When selecting a transmitter, the working voltage and system cost should be considered comprehensively.
Determine if the required pressure transmitter can accommodate multiple usage systems. This is important in general, especially for OEM products. Once the product is delivered to the customer, the customer’s cost for calibration is considerable.
If the product has good interchangeability, even changing the pressure transmitter used will not affect the effect of the entire system.
Most pressure transmitters will “drift” after overwork. Therefore, it is necessary to know the stability of the transmitter before purchasing. This kind of pre-work can reduce all kinds of troubles in future use.
The protection level of the pressure transmitter is often easily overlooked. However, this point will gradually expose its shortcomings in future use. When purchasing a transmitter, be sure to consider the working environment and humidity of the pressure transmitter in the future. How to install the transmitter. Will there be strong impact or vibration, etc.
Including whether to use short-distance connection? For long-distance connections, do I need to use a connector? These must be considered clearly.
In addition to the above 10 points, we should pay attention to when selecting the pressure transmitter. When purchasing pressure transmitters, we also need to follow the following principles:
When selecting a pressure transmitter, some principles should also be paid attention to:
The pressure transmitter with suitable pressure and accuracy should be selected based on the property index of the measured medium. For example, the measured medium is a place with high viscosity, easy crystallization and strong corrosion. You must choose an isolated transmitter.
From an economic point of view, the material of the outer diaphragm and the insert part is more important, and the appropriate one should be selected. However, the connecting flange can reduce the material requirements. If carbon steel is used, it will save a lot of cost.
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The selected pressure transmitter should be easy to install and use. For example, in high-altitude areas, absolute pressure transmitters should be used; in places where wiring is inconvenient. A wireless pressure transmitter should be used.
The selected pressure transmitter should be stable in use and not prone to failure problems. In case of failure, maintenance should be convenient.
In the era of intelligent development of industrial instruments, intelligent pressure transmitters should be given priority.
Selection of pressure transmitter must be decided before purchasing a pressure transmitter. To ensure the reasonable and reliable use of the pressure transmitter, it must be reasonably selected and installed correctly.
Selection of pressure transmitter is mainly considered from the measured medium, temperature environment, accuracy level, installation and maintenance costs, etc. After determining the manufacturer and model of the transmitter used, determine its range according to the requirements of use. When selecting the measurement range, the principles of adjustable range, high precision and moderate price should be followed.
Sino-Inst is a manufacturer of industrial pressure transmitters. We supply more than 50 kinds of pressure transmitters. Including diffused silicon pressure transmitters, capacitive pressure transmitters, single crystal silicon pressure transmitters, temperature and pressure dual-function transmitters, etc.
Sino-Inst has been supplying customers with high-quality, cost-effective industrial pressure transmitters for many years.
If you need to purchase Industrial Pressure Transmitters, or have any technical questions about Industrial Pressure Transmitters, please feel free to contact our engineers.
An output of the instrument designed to automatically measure the pressure is compared to the result of some other pressure strain gauges, portable pressure calibrator, digital pressure calibrator or a pressure monitoring standard. Plumbing the equipment over test (DUT) towards the standard instrument and producing a comparable pressure in the measurement circuit are standard techniques.
The instruments’ outputs are compared and examined at one or maybe more pressures, usually at a range. It could be from the lowest to maximum values of the DUT’s complete gamut or the ballpark under which it is generally employed. To guarantee that pressure specifications are met and match the recognised or mandatory criteria, this assessment procedure is carried out in a sequence from the highest possible level of basic pressure realisation through to common pressure measurement devices.
Regulatory frameworks are used by vendors of pressure sensors, transmitters, pressure gauges, pressure indicators, pressure switches, and other pressure measurement tools to guarantee that a product satisfies requirements. It could also provide monitored pressure calibration equipment with new instruments, as well as after-sale calibration solutions. Based on the capabilities of the device being analyzed, pressure sampling strategies, starting from basic pressure metrics to high-performance piston gauges, are required for these pressure tests and calibration operations.
You have the go-ahead and the funds to buy brand-new pressure calibration equipment. So, how do you come up with the ideal solution? Planning is as simple as asking yourself these five questions. Among several other things, you may want to consider your workload. Especially the location and placement of the calibration, pressure development and management, and automation.
Users could then hunt for calibrators that would offer a 4:1 test ambiguity ratio after knowing the parameters of the system under test (DUT).
If you’re going to use the calibrator in the line of work, your needs will be varied than if you’re using it in a controlled laboratory setting. For sampling, in particular, you’ll want to have something compact and portable. It’s even preferable if it’s multi-functional, allowing you to use only one device rather than several.
You can ascertain that what models in all those subgroups can also be used to calibrate your compression devices based on pressure measurement configuration (absolute, gauge, or differential), analyse medium (gas, oil, or water), and pressure monitoring scope even before you know which classifications of types of equipment will fulfil your measurement unpredictability necessities and will start operating in your environment.
The device under test (DUT) and calibration show the extent must be compared at several pressure points throughout the DUT’s gamut in most calibration measurement methods. Because some DUTs or mechanisms to be calibrated have constructed pressure production and control, the calibration standard may not have been required. Whenever an alternative source is required, Nagman Calibration provides various types of calibrator types with integrated pressure control, as well as production and regulate pressure calibrator peripherals.
Deployment of an automated process on the pressure calibration procedure has many potential advantages. It includes increased productivity, improved pressure measurement techniques, elimination of human bias throughout the calibration period, standardisation of calibration procedures, removal of data gathering and typographical errors, and decreased security and ergonomic concerns. Nagman Calibration products have characteristics that allow for automation to the extent that the equipment under test allows (DUT). Nagman Calibration offers solutions for entirely unsupervised calibration, even at the greatest degrees of measurement efficiency, when the DUT has an electrical output (distant communications or an electromagnetic wave signal that can be received by a DMM).
You’ll want to double-check that you have everything you need to connect everything, shield the system from contamination, and connect the DUT to the test port. You’ll also need a mechanism to attach the DUT, apply pressure to it, and take readings while it’s being calibrated. Would you need to install or transfer the system, and if so, do you have the necessary tools? How can you keep the instrument in good working order? Do you require any training?
Nagman Calibration provides more information to assist you in making the optimal pressure calibration system decision.
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