The Fredericks Company will be closed for the holiday season starting Tuesday, December 24, 2019. We will reopen on Thursday, January 2, 2020.

Fredericks Company

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+1 215 947 2500

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1F Diaphram
1 - 7,600 Torr
1E Diaphram
1 - 1,000 Torr
4A Convection
10-3 - 1,000 Torr
MX4A Convection
10-4 - 1,000 Torr
2A Thermocouple
10-3 - 20 Torr
MX2A Thermocouple
10-4 - 1,000 Torr
CC10 Crystal / Cold Cathode Combination
10-9 - 1,000 Torr
7B2 Cold Cathode
10-7 - 10-3 Torr
7E Cold Cathode
10-8 - 10-2 Torr
7F Cold Cathode
10-11 - 10-2 Torr
3F Mini Metal Bayard-Alpert Hot Ion
10-10 - 10-2 Torr
ETI 4336 Glass Envelope Bayard-Alpert
10-10 - 10-3 Torr
ETI 8142 Glass Envelope Bayard-Alpert
10-10 - 10-2 Torr
ETI 8130 Nude Bayard-Alpert
10-10 - 10-3 Torr
ETI 8140 Nude Bayard-Alpert
10-11 - 10-2 Torr
Controllers
  • Overview
  • MX200
  • MX200 EthernetIP
  • MC300
  • MV2A Thermocouple
  • Compact 2A Thermocouple
Portable Controllers
  • Overview
  • VacuGuard
  • B2A Portable
Active Vacuum Gauges
  • Overview
  • MX2A Thermocouple (Pirani)
  • MX4A Convection (Pirani)
  • MX7B Cold Cathode
  • MX Active Gauge EthernetIP Gateway
  • CC-10 Wide Range Gauge
  • MP7ER Cold Cathode
  • MP7FR Cold Cathode
Passive Vacuum Gauges
  • Overview
  • 2A Thermocouple (Pirani)
  • 2A VacuMini Thermocouple (Pirani)
  • 2A NASA Mini Thermocouple (Pirani)
  • 4A Convection Gauge (Pirani)
  • 1E Piezo Diaphragm
  • 1F Piezo Diaphragm
  • 7B Penning Magnetron Cold Cathode
  • 7E DI Magnetron Cold Cathode
  • 7F DI Magnetron Cold Cathode
  • 7FC DI Magnetron Cold Cathode
  • 7FCS DI Magnetron QS Cold Cathode
  • 3F Mini BA Hot Ion
  • ETI Hot Ion Passive Vacuum Gauges
    • Overview
    • 4336 Glass Bayard-Alpert
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    • MX200, MM200
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Legacy Products
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  • MP3DR Hot Ion
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    • Televac AN 3000: MX Series Replacement of MP Series Active Gauges
    • Televac AN 3001: Comparison of the MX2A and MX4A Active Gauges
    • Televac AN 3002: Cleaning the 7B2 and 7E Cold Cathode Passive Gauges
    • Televac AN 3004: Cleaning the 7FC and 7FCS Cold Cathode Passive Gauges
    • Televac AN 3006: Resetting the MM200 Data Memory
    • Televac AN 3007: Changing the MM200 Analog Output Settings
    • Televac AN 3008: MX200 to PC Interfacing and Communications
    • Televac AN 3009: MM200 to PC Interfacing and Communications
    • Televac AN 3010: Torr Scientific/Torr Decimal/mTorr/Micron Conversions
    • Televac AN 3011: MX200 and MM200 Analog Output Comparisons
    • Televac AN 3015: Recommended Practices for Vacuum Calibration
    • Televac AN 3016: MX200 EthernetIP Loading EDS Files for Rockwell Automation Allen-Bradley CompactLogix PLCs
    • Televac AN 3017: MX200 EthernetIP Setup and Troubleshooting Guide for EthernetIP Option 1
    • Televac AN 3018: MX200 EthernetIP Setup and Troubleshooting Guide for EthernetIP Option 2
    • Televac AN 3020: Vacuum Terminology Reference
    • Televac AN 3022: Automatic Control of an MP7ER/MP7FR with an MX2A/MX4A
    • Televac AN 3025: Hot Ion Vacuum Gauge Degas Instructions for the MM200
    • Televac Tolerances
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Televac Passive Vacuum Gauges

Televac Passive Vacuum Gauges
The Fredericks Company’s Televac® vacuum measurement brand designs and manufactures passive vacuum gauges (also called a vacuum sensor or a vacuum transducer) including thermocouple gauges, convection gauges (also called Pirani gauges), and diaphragm gauges for low vacuum measurement along with cold cathode gauges (also called Penning ionization gauges) and hot ion gauges for high vacuum measurement.

We’ve designed all of our vacuum transducers to be cost-effective, robust, contamination resistant, and optimized for a variety of different applications and environments. Some of the most common markets where our units are used are heat treat and vacuum furnaces, national labs and research and development, and cryogenics and industrial gases.
Televac thermocouple vacuum gauge vacuum transducer vacuum pressure gauge
2A Thermocouple (Pirani)
10-4 Torr to 1000 Torr max
Televac thermocouple vacuum gauge vacuum transducer vacuum pressure gauge
2A VacuMini Thermocouple (Pirani)
10-3 Torr to 20 Torr
Televac thermocouple vacuum gauge vacuum transducer vacuum pressure gauge
2A NASA Mini Thermocouple (Pirani)
10-3 Torr to 20 Torr
Televac vacuum gauge convection gauge pirani vacuum transducer
4A Convection Gauge (Pirani)
10-4 Torr to 1000 Torr max
Piezo Diaphragm Vacuum Gauge
1E Piezo Diaphragm
1 Torr to 1000 Torr
iezo Diaphragm Vacuum Gauge
1F Piezo Diaphragm
10 Torr to 9900 Torr
Televac vacuum gauge cold cathode gauge penning ionization gauge
7B Penning Magnetron Cold Cathode
10-7 Torr to 10-3 Torr
Double Inverted Magnetron Cold Cathode
7E DI Magnetron Cold Cathode
10-8 Torr to 10-2 Torr
Double Inverted Magnetron Cold Cathode Vacuum Gauge
7F DI Magnetron Cold Cathode
10-11 Torr to 10-2 Torr
Double Inverted Magnetron Cold Cathode Vacuum Gauge
7FC DI Magnetron Cold Cathode
10-11 Torr to 10-2 Torr
Double Inverted Magnetron Cold Cathode Vacuum Gauge
7FCS DI Magnetron QS Cold Cathode
10-11 Torr to 10-2 Torr
Mini Hot Ion Gauge
3F Mini BA Hot Ion
10-10 Torr to 10-2 Torr
ETI Hot Ion Passive Vacuum Gauges
Our ETI vacuum measurement brand offers various types of vacuum technology including glass and nude hot ion vacuum gauges (also called a hot filament, Bayard-Alpert, BA, or BAG vacuum gauge or vacuum sensor) 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.
Bayard-Alpert Ionization Gauge
4336 Glass Bayard-Alpert
Bayard-Alpert Gauge
8142 Glass Bayard-Alpert
Nude Ionization Gauge
8130 Nude
Nude Ionization Gauge
8140 Nude

All Televac passive gauges require a vacuum controller or an active gauge in order to provide vacuum measurement for an end user. Vacuum controllers connect to our passive gauges with cables, whereas an active gauge electronics head plugs directly into a passive gauge.

If you’re interested in a rack or panel mounted vacuum controller, a good place to start is the MX200, or if you’re interested in a portable vacuum controller, check out the VacuGuard. If you want an active gauge, check out our MX4A (Pirani gauge) and MX7B (penning ionization gauge)!

Not sure which passive gauge to select? Here’s some additional information on our most popular passive vacuum gauges.

2A Thermocouple Pirani Vacuum Gauge

Our 2A thermocouple gauge (also often called a Pirani) is widely considered to be our most robust and contamination resistant low vacuum transducer due to the Pirani filament design and operating temperature, and it’s simple to install because it can be mounted in any orientation. The 2A thermocouple vacuum gauge’s primary limitation is that with all of our vacuum controllers, this thermocouple gauge will only read from 1*10-3 Torr (1 micron) to 20 Torr (20,000 microns), instead of all the way up to atmosphere (760 Torr). It also has slightly reduced accuracy over some parts of its operating range when compared to the 4A convection Pirani vacuum gauge.

4A Convection Pirani Vacuum Gauge

The 4A convection gauge (also often called a Pirani) is essentially an improved performance version of the 2A thermocouple vacuum transducer. It’s another very robust and contamination resistant low vacuum gauge option due to the Pirani design, but the 4A convection gauge must be installed in a vertical orientation in order to measure up to atmosphere (760 Torr). Its primary benefits over the 2A thermocouple Pirani gauge are that the 4A convection gauge has better accuracy (±10%) over its operating range, and that it can read from 1*10-3 Torr (1 micron) up to atmosphere (760 Torr).

7B Penning Ionization Gauge (Cold Cathode)

The 7B cold cathode vacuum gauge is a Penning ionization gauge which is known in the heat treat and vacuum furnace industry as the most robust and contamination resistant high vacuum gauge available on the market due to its mechanical design and operating voltage. This Penning ionization gauge has a vacuum measurement range from 10-7 Torr to 10-3 Torr and can be disassembled and cleaned many times by an end user to extend its life.

The 7B cold cathode vacuum gauge is typically paired with a 2A thermocouple vacuum gauge or a 4A convection vacuum gauge, which automatically turns on the 7B when it reaches 1*10-2 Torr. When paired with a 4A convection vacuum gauge you have a full range vacuum measurement solution from high vacuum (10-7 Torr) to atmosphere (760 Torr).

7FCS Cold Cathode Gauge Vacuum Transducer

The 7FCS cold cathode vacuum gauge is a double inverted magnetron gauge (as opposed to Penning ionization gauge technology) designed for UHV (ultra high vacuum; 10-11 Torr) vacuum measurements which is known in national labs for its quick start capability. Unlike other cold cathode gauges, it includes a filament which is turned on every time the cold cathode gauge turns on, allowing it to start and provide accurate readings at 10-8 Torr (or lower) within 5 seconds. This is particularly useful for national labs where power cycling can often occur while the system remains in high vacuum or UHV.

The 7FCS cold cathode vacuum gauge is typically paired with a 2A thermocouple Pirani gauge or a 4A convection Pirani gauge, which automatically turns on the 7FCS when it reaches 1*10-2 Torr. When paired with a 4A you have a full range vacuum measurement solution from high vacuum (10-11 Torr) to atmosphere (760 Torr).

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The Fredericks Company
2400 Philmont Avenue
Huntingdon Valley, PA 19006

+1 (215) 947-2500
[email protected]

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