Agilent Varian HELITEST HAND HELD PROBE 10 M., Helium-Leak-Detectors, Helium Leak Detectors,  PN  9693525

These Agilent Varian HELITEST HAND HELD PROBE 10 M.  have part number 9693525, are new, and come with full Agilent Varian warranty. The Agilent PHD-4 is a portable, compact leak detector that runs on its own battery for up to four hours. Weighing only 2.6 kg (5.7 lbs) including the battery, it can be taken anywhere. The PHD-4 detects very small leaks in objects that have a slight helium/air pressure inside. It is sensitive to helium concentrations as small as 2 parts per million which equivalent to a leak rate of 5 x 10-6 atm-cc/sec. This level of sensitivity is far superior to the performance of other means of detecting leaks such as bubble testing. To accomplish this it relies on Agilent Varian?s proprietary and patented Selective Ion Pump Detection (SIPD) technology. Controlled by a microprocessor, the PHD-4 is easy to use with no training required. All tuning and zeroing are handled automatically. The display can be set to use any of four languages; English, French, German, and Italian.

Helium Leak Testing Basics
Helium mass spectrometry, or helium leak testing, is a highly precise means of leak detection. This technology was first developed for the Manhattan Project during World War II to locate extremely small leaks in the gas diffusion process.

At the heart of helium leak testing is a complex piece of equipment called a helium mass spectrometer. Quite simply, this machine is used to analyze air samples (which are introduced into the machine via vacuum pumps) and provides a quantitative measurement of the amount of helium present in the sample. In practice, a "leak," is identified by a rise in the level of helium being analyzed by the machine.

Helium leak testing can identify extremely small leaks. For example, our equipment can detect a leak so small that it would emit just two cubic centimeters of helium (or the amount equal to two sugar cubes) in 320 years. While very few applications require this level of precision, this example serves to highlight the accuracy possible with this process.

While helium leak detection may appear to be a simple procedure, the process involves a combination of both art and science. The user must ensure the equipment is functioning properly and the process is highly dependant upon the user?s experience. Consider this analogy: while anyone with enough money can buy an airplane, learning how to fly one takes a lot of practice. The same is true with helium leak detection, make sure your "pilot" knows how to fly.

Why Is Helium Superior?
While many gases are used in leak detection, heliums qualities provide for superior testing. Having an AMU (Atomic Mass Unit) of only 4, helium is the lightest inert gas.

More information about these Agilent Varian HELITEST HAND HELD PROBE 10 M.  can be found by downloading the pdf catalog and documents below. Simply open the pdf catalog below, run the pdf search (ctrl F) and search for the 9693525.