Compare Model Drawings, CAD & Specs Fitting Type Flange Size Filament Availability Price
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 0.75 in. Tube
$250
2 Weeks
355001-TA Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 0.75 in. Tube 0.75 in. Tube Tungsten
2 Weeks
$250
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 15 mm Tube
$250
2 Weeks
355001-TB Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 15 mm Tube 15 mm Tube Tungsten
2 Weeks
$250
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 18 mm Tube
$250
355001-TC Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 18 mm Tube 18 mm Tube Tungsten $250
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, NW16-KF
$280
2 Weeks
355001-TD Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, NW16-KF ISO-KF NW16 Tungsten
2 Weeks
$280
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, NW25-KF
$285
2 Weeks
355001-TE Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, NW25-KF ISO-KF NW25 Tungsten
2 Weeks
$285
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 1.33 in. CF
$285
2 Weeks
355001-TF Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 1.33 in. CF CF Flange 1.33 in. Tungsten
2 Weeks
$285
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 2.75 in. CF
$295
2 Weeks
355001-TG Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 2.75 in. CF CF Flange 2.75 in. Tungsten
2 Weeks
$295
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 8 VCR Male
$295
2 Weeks
355001-TH Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 to 0.05 Torr, 8 VCR Male 8 VCR male Tungsten
2 Weeks
$295
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 - 0.05 Torr, 1.0 in. tube
$285
355001-TJ Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 - 0.05 Torr, 1.0 in. tube 1.0 in. Tube Tungsten $285
Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 - 0.05 Torr, NW40-KF
$295
2 Weeks
355001-TK Micro-Ion® Bayard-Alpert Vacuum Gauge, Tungsten, 5x10-10 - 0.05 Torr, NW40-KF ISO-KF NW40 Tungsten
2 Weeks
$295
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 0.75 in. Tube
$250
2 Weeks
355001-YA Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 0.75 in. Tube 0.75 in. Tube Yttria-coated Iridium
2 Weeks
$250
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 15 mm Tube
$250
2 Weeks
355001-YB Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 15 mm Tube 15 mm Tube Yttria-coated Iridium
2 Weeks
$250
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 18 mm Tube
$250
355001-YC Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 18 mm Tube 18 mm Tube Yttria-coated Iridium $250
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW16-KF
$280
2 Weeks
355001-YD Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW16-KF ISO-KF NW16 Yttria-coated Iridium
2 Weeks
$280
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW25-KF
$285
2 Weeks
355001-YE Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW25-KF ISO-KF NW25 Yttria-coated Iridium
2 Weeks
$285
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 1.33 in. CF
$285
2 Weeks
355001-YF Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 1.33 in. CF CF Flange 1.33 in. Yttria-coated Iridium
2 Weeks
$285
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 2.75 in. CF
$295
2 Weeks
355001-YG Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 2.75 in. CF CF Flange 2.75 in. Yttria-coated Iridium
2 Weeks
$295
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 8 VCR Male
$295
2 Weeks
355001-YH Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 8 VCR Male 8 VCR male Yttria-coated Iridium
2 Weeks
$295
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 1.0 in. tube
$285
2 Weeks
355001-YJ Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, 1.0 in. tube 1.0 in. Tube Yttria-coated Iridium
2 Weeks
$285
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW40-KF
$295
2 Weeks
355001-YK Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW40-KF ISO-KF NW40 Yttria-coated Iridium
2 Weeks
$295
Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW16-KF Extended
$310
355001-YM Micro-Ion® Bayard-Alpert Vacuum Gauge, Iridium, 5x10-10 - 0.05 Torr, NW16-KF Extended ISO-KF Extended NW16 Yttria-coated Iridium $310

Specifications

  • Sensor Type
    Micro-Ion Ionization Gauge
  • Measurement Range
    5x10-10 to 5x10-2 Torr
    6x10-10 to 7x10-2 mbar
    6x10-8 to 7 Pa
  • Exposed Materials
    304 stainless steel, alumina, tantalum, tungsten, CuAg eutectic, Kovar®
  • Bake Out Temperature
    200°C maximum, non-operating, cable disconnected
  • Internal Volume
    10.8 cc to port screen
  • Weight
    113 g (4 oz) with NW16KF fitting
  • Sensitivity for N2
    20/Torr, 15/mbar, 0.15/Pa
  • X-ray Limit
    < 3x10-10 Torr, < 4 x10-10 mbar, < 4x10-8 Pa
  • Filament
    Yttria-coated iridium or tungsten

Features

The Micro-Ion Gauge is the world’s smallest ionization gauge where pressure measurement is based on the amount of ion current that is generated when energized electrons collide with gas molecules in the gauge. High performance in a small volume is achieved through a number of enhancements including its patented dual ion collector design that optimizes electron motion and ion collection. Dual filaments provide extended lifetime by running both filaments simultaneously at a lower current, and avoid unscheduled downtime by using the second filament as a backup. Ultra-clean construction, including vacuum firing of all components and assembly in a Class 100 cleanroom environment ensures rapid, repeatable response during vacuum chamber pumpdown.

  • World’s Smallest Ionization Gauge: Micro-Ion Gauges occupy less than 10% of the volume of conventional glass gauge or nude gauges, allowing easy installation in complex, tightly packed vacuum systems.
  • High Performance: Patented dual ion collector design increases electron path length and ion collection efficiency providing high performance in a small volume.
  • Long-Term Stability: The grid windings are attached to the grid posts every 180° for greater sensitivity and stability.
  • Dual Filaments: Dual, burn-out resistant yttria-coated iridium filaments provide long gauge life. Unscheduled downtime is avoided by using the second filament as a back-up until the gauge can be replaced during regular maintenance procedures.
  • Cooler Operation: At only 8% of the power consumption of a traditional glass or nude gauge, the Micro-Ion Gauge generates significantly less heatrelated process or experiment disturbances.
  • Port Shield: Protects the electrode assembly from damage during assembly or vacuum chamber maintenance, and provides a stable electrical environment for improved measurement performance.
  • All-Metal Enclosure: Prevents grid and filament damage during mounting and eliminates the risk of glass breakage.
  • Wide Selection of Vacuum Fittings: Simplifies installation on your vacuum system.

Series 358 Micro-Ion® Gauge Controller

The Series 358 Micro-Ion® Controller is designed specifically to obtain the highest performance from the Micro-Ion® Gauge. It is capable of measuring from a lower limit in the 10-10 Torr range (10-10 mbar, 10-8 Pa) to 5x10-2 Torr (7x10-2 mbar, 7 Pa). Pressure measurements can be extended to atmosphere with the Dual Convectron® Gauge Option.

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