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Fredericks Company
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    • Tilt Measurement
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1F Diaphragm
1 - 7600 Torr
1E Diaphragm
1 - 1000 Torr
4A Convection
10-3 - 1000 Torr
MX4A Convection
10-4 - 1000 Torr
2A Thermocouple
10-3 - 20 Torr
MX2A Thermocouple
10-4 - 1000 Torr
CC-10 Wide Range
10-9 - 1000 Torr
7B Cold Cathode
10-7 - 10-3 Torr
MX7B Cold Cathode
10-8 - 10-3 Torr
MX7M Cold Cathode
10-11 - 10-2 Torr
7E Cold Cathode
10-8 - 10-2 Torr
7F/7FC/7FCS Cold Cathode
10-11 - 10-2 Torr
3F Mini BA Hot Ion
10-10 - 10-2 Torr
Vacuum Controllers
  • Overview
  • MX200
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  • MC300
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Portable Vacuum Controllers
  • Overview
  • VacuGuard™
  • B2A Portable
Active Vacuum Gauges
  • Overview
  • MX2A Thermocouple (Pirani)
  • MX4A Convection (Pirani)
  • MX7B Cold Cathode
  • MX7M Cold Cathode (New!)
  • MX Active Gauge EthernetIP Gateway
  • CC-10 Wide Range
  • MP7ER Cold Cathode
  • MP7FR Cold Cathode
Passive Vacuum Gauges
  • Overview
  • 2A Thermocouple (Pirani)
  • 2A VacuMini Thermocouple (Pirani)
  • 2A NASA Mini Thermocouple (Pirani)
  • 2V6 Thermocouple (Pirani)
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  • 7FC DI Magnetron Cold Cathode
  • 7FCS DI Magnetron QS Cold Cathode
  • 3F Mini BA Hot Ion
  • ETI Hot Ion
    • Overview
    • Glass Bayard Alpert Ion Gauge
    • Nude Bayard Alpert Ion Gauge
Custom Filaments
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Accessories
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Calibration and Service
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Legacy Products
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Technical Information Overview
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Product Selection Guide
MX200 Configurator Tool
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Vacuum Measurement Converter
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ETI Hot Ion Passive Vacuum Gauges

ETI Hot Ion
Our ETI brand offers various types of vacuum technology including glass and nude hot ion gauges (also called a hot filament, Bayard-Alpert, BA, or BAG gauges or vacuum sensors) for high-vacuum measurement from 10-10 Torr to 10-3 Torr using tungsten filaments. This vacuum technology is popular in the semiconductor industry for the higher accuracy it offers over cold cathode vacuum technology. While hot ion gauges provide better accuracy than cold cathode gauges, hot ion gauges are also more expensive, cannot be cleaned, and are more susceptible to contamination so they don’t last as long.
ETI 8142 Hot Ion Vacuum Gauge
Glass Bayard Alpert Ion Gauge
ETI 8130 Hot Ion Vacuum Gauge
Nude Bayard Alpert Ion Gauge

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The Fredericks Company
2400 Philmont Avenue
Huntingdon Valley, PA 19006

+1 215 947 2500
[email protected]

Products

  • Tilt Measurement
  • Televac Vacuum Measurement
  • Precision Components

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