6 Pressure Calibrator Manufacturers in 2022
This section provides overview, applications, and principles of pressure calibrators. Also, please take a look at the list of 6 pressure calibrator manufacturers and their company rankings.
Table of Contents
What Is a Pressure Calibrator?
A pressure calibrator, also called a pressure standard, is an instrument used in the maintenance of pressure gauges. Deadweight testers are commonly used as pressure calibrator. Deadweight testers are available for hydraulic pressure, water pressure, and air pressure. The model is selected according to the pressure gauge to be calibrated, the application, and the magnitude of the pressure. You can also choose between portable and stationary types.
Deadweight pressure gauges can measure mechanical and electrical pressure, but cannot calibrate instruments that measure high vacuum conditions, such as ionization vacuum gauges.
Other electronic pressure calibrators are also available.
Uses of Pressure Calibrators
Pressure calibrators are used to calibrate pressure gauges and pressure sensors as part of their maintenance. Also, when manufacturing pressure gauges in factories, pressure calibrators are used to check the functionality of the gauges in conformity with local standards.
Pressure calibrators can be used as differential pressure manometers as well as calibration functions.
Electronic pressure calibrators have the ability to record various data in memory and are sometimes used for calibration of pressure transmitters, pressure switches, and electro-pneumatic/pneumatic transducers.
Principle of Pressure Calibrators
This section explains the principle of deadweight testers, which are often used as one of the pressure calibrators. Deadweight testers are based on the most basic pressure principles and have been highly reliable pressure calibrators.
Pressure is defined as a vertical downward force multiplied by a cross-sectional area. Deadweight pressure gauges are simply measured by a cylinder, a piston, and a deadweight of known weight on the piston. A moving piston is fitted into the cylinder without friction. There is a fluid under pressure in the cylinder, which is held back by the gravity of the deadweight through the piston. The pressure is calculated and measured using the gravity of the deadweight and the cross-sectional area.
In order to improve the accuracy of deadweight pressure gauges for gases, careful consideration must be given to the fit of the piston and cylinder and the surrounding environment, including humidity, oil, electricity, and magnetism. Therefore, the piston and cylinder are carefully cleaned, but the effect may be small if the bore diameter is large.
More stable performance can be expected from liquid pressure gauges than from deadweight pressure gauges for gases.
Calibration of Pressure Gauges
Calibration of pressure gauges is necessary because it is necessary to ensure conformity to standards and laws and traceability. If calibration is not performed at regular intervals, the reliability of evaluation and verification is lost, and the reliability of measurement data cannot be obtained.
Moreover, if the calibration is significantly out of range, measurement errors can be significant. This can delay product development and significantly reduce manufacturing yields.
In addition, it may also lead to accidents such as damage to the pressure vessel. Therefore, it is necessary to determine the calibration cycle of pressure gauges by considering whether calibration should be performed in the general calibration range, although the content varies depending on the calibration method.
Calibration documents for calibrating pressure gauges generally include an inspection certificate, inspection report, traceability system chart, and a copy of the calibration certificate of the standard instrument.
Calibration Method of Pressure Gauges
There are two main methods of calibrating pressure gauges: digital pressure gauges and mechanical pressure gauges.
Calibration methods for digital and mechanical pressure gauges use gas or liquid as the pressure medium, and the calibration value is calculated from the average value by repeatedly measuring the pressure increase or decrease against the pressure of each measurement indication value. Calibration instruments generally used in calibration are dead-weight pressure balances and digital pressure gauges.
The reason for this is that calibration in the general calibration range is based on the calibration ability of the person in charge of calibration and the relationship of trust with the client. It is reliable because the technical competence of pressure gauge testing and calibration facilities has also been evaluated.
Therefore, it is necessary to consider the appropriate calibration method for pressure gauges, depending on their intended use.
List of 6 Pressure Calibrator Manufacturers
*Including some distributors, etc.
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AMETEK Sensors, Test & Calibration
Pressure Calibrators
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Ralston Instruments
FLP1 FieldLab Digital Pressure Calibrator
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Pressure Calibrator Manufacturer Ranking
*Including some distributors, etc.Number of Employees
Newly Established Company
- Ralston Instruments: 1969 (54 years ago)
- Mensor LP: 1969 (54 years ago)
- Omega Engineering, Inc.: 1962 (61 years ago)
Company with a History
- Omega Engineering, Inc.: 1962 (61 years ago)
- Ralston Instruments: 1969 (54 years ago)
- Mensor LP: 1969 (54 years ago)
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