Vacuum Sensors
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Vacuum Pressure: What is it and How to Measure it?
The term vacuum is often misunderstood and, as a result, misapplied when discussing pressure measurements and selecting pressure transducers. By definition, a vacuum is a space that is partially evacuated (to the highest possible degree) by artificial means, such as a vacuum pump. This definition signifies high or hard vacuum.
Remember, gauge pressure is the pressure measured relative to ambient atmospheric pressure (approximately 14.7 PSIA). It is measured in pounds per square inch gauge (PSIG).
As you can see, vacuum can refer to any pressure between 0 PSIA (0 bar) and 14.7 PSIA (-1 bar) and, as a result, needs to be further defined. Two different approaches are typically used for measuring vacuum pressures over the entire range.
Vacuum gauges are used to measure pressures that are lower than ambient atmospheric pressure.
Pressure = force per unit area. When pressure decreases, power decreases proportionally. Various gauges have been developed for different measurement ranges depending on their intended use and operating conditions. Pirani developed a thermal conductivity-based pressure gauge in 1906, Buckley developed a hot cathode gauge in 1916, and Penning developed a cold cathode gauge in 1937.
Whatever you need in vacuum measurement, you'll find the right sensor, gauge, and display device from us. Our selection includes a wide variety of options, and our mission is to find the right products and solutions for your application.
Different gauges are used depending on the vacuum because different vacuum levels require different measurement techniques. It is important to know the current vacuum level from the vacuum system perspective.
- An electronic sensor is required for accurate and precise measurement of vacuum and pressure values.
- An electronic device is required to convert vacuum and pressure values into an analog output signal for the controller.
- A compact sensor unit can be used for direct mounting on the suction cup, especially in decentralized vacuum systems.
Working Principle of Vacuum Sensor
Vacuum sensors are designed to measure vacuum pressure. The element inside the sensor is used to measure changes in vacuum pressure. This element is typically made of a piezoelectric crystal and works mechanically. The sensor measures pressure changes by converting them into electrical signals.
Types of Vacuum Sensors
Vacuum sensors are produced in different types for different industrial applications. Some vacuum sensors include:
- Piezoelectric vacuum sensors
- Capacitive vacuum sensors
- Thermal vacuum sensors
- Liquid vacuum sensors
Things to Consider When Buying!!
When buying a vacuum sensor, it is important to pay attention to the sensor's specifications, application needs, and price. Some factors may include:
- Sensor measurement range
- Sensor accuracy
- Sensor sensitivity
- Sensor output type
- Sensor installation and usage
Each model has a detailed product page with information on power supply voltages, output types, input types, and operating modes. It is also noted that their pressure sensors, like all other products on their website, are designed for industrial automation machines and are equipped with galvanic isolation to protect against potential interference sources like frequency drives, power supplies, and small and large induction motors.
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