Explanations for product markings found on ATEX approved equipment. ATEX is the regulatory directive for the design, installation and use of products in environments where there is a potential explosion risk from flammable gases or dust that are or could be present in the surrounding air.
For more in-depth information on the ATEX directive we suggest you visit the UK Health and Safety Executive or the European Union Commission. To get a product ATEX approved we suggest contacting Baseefa or SIRA in the UK.
Practical uses of Atmospheric Pressure Measurement
The measurement of ambient air pressure is carried out in many applications throughout research and industry.
The most well known use is as a barometer for weather monitoring but there are a number of other measurements that incorporate barometric pressure as well, some of the most common are explained below.
The most well known use is as a barometer for weather monitoring but there are a number of other measurements that incorporate barometric pressure as well, some of the most common are explained below.
Measuring Suction and Vacuum Pressure
Explanations for technical queries relating to measuring negative gauge and absolute pressures in the vacuum range.
How is suction pressure measured?
Use a gauge reference pressure measuring device with a range scaled in the negative direction. The zero to full scale range will depend on the maximum suction pressure expected.
How is a vacuum measured?
A vacuum is any pressure that is below atmospheric pressure. A vacuum can be measured using an absolute pressure sensing device. Zero absolute pressure is a perfect vacuum, the higher the absolute pressure the lower the vacuum.
How is suction pressure measured?
Use a gauge reference pressure measuring device with a range scaled in the negative direction. The zero to full scale range will depend on the maximum suction pressure expected.
How is a vacuum measured?
A vacuum is any pressure that is below atmospheric pressure. A vacuum can be measured using an absolute pressure sensing device. Zero absolute pressure is a perfect vacuum, the higher the absolute pressure the lower the vacuum.
Questions often asked about Pressure Calibration
Explanations for questions asked about pressure calibration techniques and terminology.
How often should you calibrate?
There is no recommended fixed period of time for re-calibrating pressure instruments since they all differ from each other in how accurately they measure pressure and how stable they are over time. Ideally if pressure measurement performance is critical to your business operation it is advisable to calibrate all pressure measuring devices as frequently as possible. Once at least 3 sets of calibration test results has been collected, the data can be compared to determine whether the re-calibration cycle can be lengthened.
How often should you calibrate?
There is no recommended fixed period of time for re-calibrating pressure instruments since they all differ from each other in how accurately they measure pressure and how stable they are over time. Ideally if pressure measurement performance is critical to your business operation it is advisable to calibrate all pressure measuring devices as frequently as possible. Once at least 3 sets of calibration test results has been collected, the data can be compared to determine whether the re-calibration cycle can be lengthened.
Using Hydrostatic Pressure Transducers for Measuring Fluid Level
There are a number of methods and technologies for measuring the level of a fluid, all of them have advantages and disadvantages depending on the installation. Measuring hydrostatically is an accurate and convenient technique for determining fluid height or volume.
Hydrostatic pressure transducers are very similar to pneumatic or hydraulic pressure transducers in the way pressure is measured, but there are some differences which are specific to liquid level measurement.
Hydrostatic pressure transducers are very similar to pneumatic or hydraulic pressure transducers in the way pressure is measured, but there are some differences which are specific to liquid level measurement.
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