Televac^® Vacuum Leak Rate Converter

This unit expresses the leak rate by combining pressure measured in torr with a volumetric flow measured in liters per second. The torr, defined as 1/760 of an atmosphere, is a non-SI unit long favored in vacuum technology and semiconductor manufacturing. When multiplied by L/s, it provides an intuitive measure of how much gas escapes a system per second, making it particularly useful for pinpointing even modest leaks in high-vacuum environments.

In mbar·L/s, the pressure is recorded in millibars—a metric unit commonly used in many scientific and industrial applications—while the flow rate is in liters per second. This combination is well suited to environments where low-pressure conditions are the norm. By linking millibar with L/s, technicians obtain a practical and easily interpretable metric that aids in routine leak testing and vacuum system diagnostics.

This leak rate unit employs the pascal (Pa), the SI base unit for pressure, paired with a volumetric flow rate measured in cubic meters per second (m³/s). The use of entirely SI units ensures a high degree of precision and consistency, making it ideal for applications in research and industry where rigorous standards are maintained. Pa·m³/s precisely quantifies the amount of gas leakage per second for every pascal of pressure difference, providing a robust measure for system integrity.

In the Pa·L/s unit, pressure is measured in pascals while the volumetric flow is expressed in liters per second. Although the liter is not an SI base unit, its everyday scale makes it a popular choice in many practical scenarios. This combination offers a balanced approach—leveraging the consistency of the pascal for pressure with the convenience of liters for volume—to effectively track and compare leak rates in sensitive applications such as vacuum system calibration and maintenance.

This unit uses atmospheric pressure (atm) alongside liters per minute (L/min) as the measure of volumetric flow. Since the atmosphere provides a natural reference for ambient conditions, atm·L/min is particularly well-suited for applications operating near standard pressure. Its straightforward representation of leak rate allows engineers and technicians to quickly assess system performance and identify potential issues in both laboratory and industrial settings.

Combining atmospheric pressure with a flow rate in cubic millimeters per second (mm³/s), atm·mm³/s is designed for detecting extremely small leaks. The use of cubic millimeters allows for high resolution in volume measurements, essential in high-precision applications where even minute amounts of gas escape must be accounted for. This unit is especially valuable in research and development settings where rigorous leak control is critical.

In atm·cm³/s, pressure is expressed in atmospheres and the flow rate is measured in cubic centimeters per second (cm³/s). This unit is commonly applied in laboratory and small-scale industrial applications where systems operate close to ambient pressure. Its ease of interpretation makes it a practical choice for monitoring leak rates and ensuring the consistent performance of sealed or vacuum-based systems.

Here, atmospheric pressure is combined with a flow rate measured in cubic centimeters per minute (cm³/min). This unit is particularly effective when monitoring leaks that occur slowly over time, as the minute-long measurement interval provides improved resolution for gradual changes. It is well suited for quality control and long-term monitoring applications where a steady leak rate needs to be tracked with precision.

This unit represents the leak rate as atmospheric pressure multiplied by a volumetric flow in cubic centimeters per hour (cm³/h). It is tailored for scenarios where leakage is extremely small and can only be effectively captured over an extended period. The long measurement interval allows even the tiniest leaks to accumulate to a detectable level, which is crucial in ultra-high vacuum systems and other sensitive environments.

In atm·m³/min, the atmospheric pressure is paired with a volumetric flow rate in cubic meters per minute. This unit is particularly useful for larger-scale systems where substantial volumes of gas may be involved. By providing a clear, macroscopic view of leak performance, it enables engineers to assess the overall efficiency and integrity of large vacuum systems and industrial processes.

This unit utilizes atmospheric pressure alongside a flow rate measured in cubic feet per minute (ft³/min), catering to industries and regions that prefer the imperial system. Often used in HVAC and large-scale facility management, atm·ft³/min offers an intuitive representation of gas flow under standard atmospheric conditions, aiding in the efficient monitoring and maintenance of ventilation and industrial processes.

Designed for monitoring exceptionally low leak rates over long periods, atm·ft³/yr combines atmospheric pressure with a volumetric flow measured in cubic feet per year. This extended time base is ideal for applications where even minuscule leaks can accumulate to significant volumes over time. It is commonly used in quality assurance and long-term system integrity assessments in environments that demand sustained performance.

This unit leverages micromercury (µHg) to measure very small pressure differences, coupling it with a volumetric flow rate in liters per second. The sensitivity of µHg makes this unit an excellent choice for high-precision leak detection and calibration tasks. It is especially useful in advanced research and manufacturing settings where even the slightest deviation from system integrity must be detected and addressed.

In µHg·ft³/min, the fine pressure measurement in micromercury is paired with a volumetric flow rate in cubic feet per minute. This hybrid unit merges the high sensitivity of µHg with the practicality of imperial volume measurements, making it ideal for specialized industrial applications and research environments. It provides an accurate means to detect and quantify leaks over larger volumes without sacrificing precision.

µHg·ft³/h expresses the leak rate as a product of micromercury and cubic feet per hour. This unit is tailored for applications that require long-term monitoring of extremely low leak rates, capturing the cumulative effect of small leaks over extended periods. By combining the high-resolution pressure measurement of µHg with an hourly volume metric, it ensures that even the most subtle leaks are reliably quantified.