UHV-24 and UHV-24p Bayard-Alpert Ion Gauge Tube

 

 

 

The Agilent UHV-24 and UHV-24p Bayard-Alpert ion gauge tubes have wide ranges of operating pressure capabilities.

The UHV-24 can measure pressures below 2 x 10-11 Torr (2.7 x 10-11 mbar), while the UHV-24p can measure pressures below 5 x 10-12 Torr (6.7 x 10-12 mbar).

Because of the small diameter and closed structure, the ionization rate is at least twice that of other ionization gauges. Their small collector diameter limits the X-ray current, which also helps extend the lower pressure limit of the gauge.

 

 

 

 

 

 

 

 

Features

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-Available with yttria-coated iridium or tungsten filaments for long-life depending on the application

 

-Easily replaceable filaments

 

-Ideal or UHV/XHV applications

 

-Has an ionization rate twice that of other ionization gauges

 

-UHV-24 measures pressures below 2 x 10^-11 Torr ( 2.7 x 10^-11mbar)

 

-UHV-24p measures pressures below 5 x 10^-12 Torr (6.7 x 10^-12mbar)

 

 

	UHV-24	UHV-24p
Pressure range	2 x 10-11 to 1 x 10-3 Torr 2 x 10-11 to 1 x 10-3mbar	5 x 10-12 to  1 x 10-3 Torr 6.7 x 10-12 to 1 x 10-3mbar
Sensitivity	25 Torr-1	20Torr-1
X-Ray limit	2 x 10-11 Torr	5 x 10-12 Torr (6.7 x 10-12)
Measurement precision	+ 20% of full scale within a pressure decade
Emission current	4 milliamps default (10A to 9.99 mA)
Bake temperature	450 °C with casble connected
Temperature limits	Operation 0°C to 250°; storage -15 to 80 °C
Degas	Electron bombardment 400 volts @ 65mA
Materials	304 ST, ceramic, Kovar, iridium or tungsten