Therefore, a variety of different vacuum gauges are available, each with their own characteristics and ability to measure over multiple decades of vacuum. In order to widen the measurement range, it is now common to combine multiple technologies into a single gauge to reduce the connections needed in a system.
A main way to differentiate vacuum gauge types is by how they measure the gas: direct or indirect pressure measurements.
Another common decision point on vacuum gauges is active or passive, with this option being available in our broad range vacuum gauges.
Robust, reliable, and accurate pressure measurement across a broad pressure range.
For the highest levels of accuracy and repeatability, in the harshest environments, these are perfect for detailed system control.
Gives you the ability to display pressure, and integrate its measurement into a wider control system. We have a range of controllers to choose from depanding on your specific requirements.
Having a gauge that has an integrated display and is battery powered enables you to measure wherever and whenever. Mechanical dial gauges are ideal when you just need an indication that you are pulling vacuum, rather than precise measurements.
Hot cathode ionization differs from cold cathode in that it has a hot filament emitting ions inbuilt into the sensor head. This technology is capable of measuring from medium to ultra-high vacuum pressures (10-12 mbar/torr), the trade off being a sensor head that requires more protection, and with its more complex design comes a higher cost of ownership.
As with cold cathode technologies, they stop measuring ~10-2 mbar/torr, therefore are normally combined with an integrated pirani to provide full range measurement in a single gauge.
Also there are different versions of the hot cathode technology, with the main types being Bayard-Alpert (ITR or IE 414) and extractor (IE 514). The extractor technology offers the lowest pressure measurement with the ability to measure to 10-12 mbar/torr