It is always hard to avoid water and gas leaks in your life:A dripping faucet in your home, a car tire slowly going flat, a gas leak from running equipment in a factory... These seemingly insignificant leaks, if not handled in a timely manner or not accurately judged, may cause considerable economic losses, and serious safety hazards.
So what does it take to accurately determine how bad a leak is? This brings us to the two important leakage display unit systems in airtightness testing.
I. Leakage units: two main types of measurement
In the field of gas tightness testing, we mainly use pressure units and flow units to measure the degree of leakage. This is just like measuring temperature can be done in Celsius or Fahrenheit, both units are useful for their own purposes.
1. Units of pressure (pressure drop units)
The unit of pressure, also known as the unit of pressure drop, is simply theIt's like scoring the degree of leakage: the smaller the value, the better the product is sealed, and the most common unit of pressure is Pascal (Pa).
Pressure units are primarily used to measure and identify the degree of leakage of a product and, like a doctor taking a patient's temperature, can accurately reflect how well a product is sealed.
The higher the accuracy of the airtightness tester, such as Jingcheng Industrial Differential Pressure Instrument accuracy of up to 0.1Pa, means that the leakage can be detected the smaller, thus providing more accurate test results for product quality to keep a good gate.
2. Flow units (leak rate units)
Flow rate units, also known as leak rate units, are used to measure the volume of gas that leaks per unit of time.There are two commonly used flow units: ml/min (milliliters per minute) and sccm (standard cubic centimeters per minute).
① ml/min (milliliters per minute)
- simple and intuitive: Like a measuring cup, it directly shows how many milliliters are leaking per minute
- Scope of application: Often used to measure larger leaks, such as domestic gas pipe testing
For example, if a gas valve leaks 10 ml of gas per minute, it leaks 10 ml/min.
② sccm (standard cubic centimeters per minute)
- Standardized measurements:Measured at 0°C, 1 atmospheric pressure
- Precise positioning:Especially suitable for detecting small leaks, widely used in semiconductor and other precision industries.
For example, if a vacuum pump leaks 1 sccm of gas per minute, the leakage is equivalent to 1 ml/min of gas.
II. Interconversion of leakage units
In practice, we often need to switch between different units to suit different measurement needs. ml/min and sccm are converted by the following formula:
- 1 ml/min = 1 sccm
Just remember this simple correspondence.In practice ml/min is equivalent to sccm.
III. The essence of engineering airtightness: so that the unit switch no longer troublesome
When it comes to the application of leakage units, it is necessary to mention the innovation brought by the airtightness tester of Jingcheng Industrial Technology. The biggest highlight of Precision Engineering's airtightness testing equipment is:
Temperature sensor airtightness tester, support leakage rate and leakage amount two kinds of leakage judgment
1. Intelligent dual-mode switching
- Self-contained leakage rate judgment and pressure drop judgment function
- Users can switch test modes with one click according to actual needs
- Automatic unit conversion without manual calculation
2. Flexible and customized programmes
- Supports user-defined leakage units based on project requirements
- Different judgment criteria can be set for different products.
- One-click recall of test parameters for easy operation
3. Data management advantages
- Real-time display of test data
- Automatic recording of test results in different units
- Support data export and analyze traceability
IV. How to choose the right leakage unit?
There are several factors to consider when choosing the right leakage unit:
(1) Characteristics of the test object
- - Large pipe leakage → select ml/min
- - Precision component testing → preferred sccm
(2) Industry standard requirements
- - Different industries may have their own specific measurement standards
- - Downstream customer acceptance criteria need to be considered
(3) Detection accuracy requirements
- - Ordinary airtightness test → pressure unit is sufficient
- - High precision requirements → flow rate units recommended
V. Summary
With the development of industrial manufacturing in the direction of intelligence and precision, the requirements of airtightness testing are getting higher and higher. Master the knowledge of the leakage unit, select the appropriate airtightness testing equipment and testing methods, will bring twice the result with half the effort for product quality control.
It is worth mentioning that the airtightness tester of Jingcheng Industrial Technology has done a particularly flexible job in unit display. The airtightness test system supports a variety of pressure unit display:
Pascal (Pa): for precision inspection scenarios
kPa (kilopascal): commonly used in general industrial testing
Bar: Internationally recognized unit of pressure.
Megapascals (MPa): for high pressure test scenarios
Milliliters per minute (ml/min): intuitive flow rate display
pounds per square inch (psi): meets North American standard requirements
Millimeter of mercury (mmHg): commonly used in the medical device industry.
This diversified unit display function not only meets the actual needs of users in different industries, but also facilitates international collaboration.Users can easily switch between different display units according to their own needs, industry standards or customer requirements, truly realizing the goal of multi-purpose, flexible response to the intelligent detection of a machine.
Under the wave of Industry 4.0, such intelligent inspection solutions will surely inject new impetus into the quality improvement and efficiency innovation of the manufacturing industry. Through standardized, digital and intelligent inspection means, it will help enterprises win the first chance in the global competition.
To learn more detailed industry testing programs and application cases, please pay attention to [Jingcheng Engineering Airtightness
