7B Cold Cathode Gauge

Part Number: 2-2100-2XX

The Televac 7B cold cathode gauge (also called a Penning ionization gauge or cold cathode ionization gauge) has a measurement range from 10-7 Torr up to 10-3 Torr. This vacuum gauge makes indirect absolute pressure measurements by ionizing gas in the presence of a magnetic field. Unlike hot filament vacuum gauges, the 7B cold cathode gauge is cleanable, contamination resistant, and isn’t as easily damaged by inrushes of gas. The design of this vacuum gauge allows for easy disassembly, enabling quick cleaning and extended use. The 7B Penning ionization gauge can be operated by the Televac MX200 rack-mountable controller or as an active gauge via the MX7B. Any vacuum controller will automatically operate the cold cathode to provide a full-range vacuum measurement solution when the 7B is used in conjunction with rough vacuum sensors like the 2A or 4A. Active vacuum gauges can also be combined using the MX2A/MX4A and MX7B to provide full range vacuum measurement with the 7B cold cathode ionization gauge.

The Televac 7B Penning Ionization Gauge Features:

  • Low cost vacuum gauge
  • Easily cleaned cold cathode gauge for extended sensor lifetime
  • Durable Penning ionization gauge construction
  • Reliable cold cathode ionization gauge technology
  • Contamination resistant, resistant to inrushes of gas, and cleanable
  • Mountable in any orientation
  • Excellent customer support
  • Designed and manufactured in the United States of America
Operating Range 1 × 10-7 Torr to 1 × 10-3 Torr
Analog Output Controller dependent
Supply Voltage Controller dependent
Mounting Orientation Any
Calibration Medium Dry air or nitrogen
Overpressure 150 psi
Analog Output Resolution Controller dependent
Operating Temperature 0 °C to 50 °C
Storage Temperature -20 °C to 70 °C
Bakeout Temperature 120 °C
Response Time ≤ 50 ms
Accuracy 1 × 10-6 Torr to 1.0 × 10-3 Torr: ± .2 decade

Analog Output Behavior

Televac vacuum gauge cold cathode gauge penning ionization gauge
7B Penning Magnetron Cold Cathode Part Number
3/4” NPT Brass 2-2100-263
1” Straight Brass 2-2100-265
1 ¼” Straight Brass 2-2100-266
3/4” Straight Stainless Steel 2-2100-267
NW25 (DN25 ISO-KF) Stainless Steel 2-2100-272

MX7B Active Gauge– the MX7B can be combined with an MX2A or MX4A active vacuum gauges to provide full range measurement from atmosphere (760 Torr) to 10-8 Torr. A digital vacuum gauge, the MX7B Active Gauge utilizes the well-known Televac 7B Penning cold cathode gauge to provide robust, contamination resistant, repeatable, and accurate vacuum measurement from 10-3 to 10-8 Torr. The sensor is also easily replaced and cleaned, saving you time and money. Other features include a multi-color OLED display, a configurable 0 to 10 V output indicating pressure, digital RS-485 and USB communications, and a set point relay and open collector for process control.

7E Double Inverted Magnetron Cold Cathode Sensor – This sensor has a measurement range from 1 × 10-8Torr up to 1 × 10-2 Torr. It indirectly measures absolute pressure by ionizing gas in the presence of a magnetic field. Unlike hot filament sensors, the 7E is resistant to inrushes of gas. The design of this sensor allows for easy disassembly, enabling quick cleaning and extended use. The 7E can be operated by several Televac controllers, including the MM200, MC300, and MP7ER. The MM200 and MC300 controllers automatically operate the cold cathode to provide a full-range vacuum measurement solution when the 7E is used in conjunction with rough vacuum sensors.

MX200 Vacuum Controller – The Televac MX200 controls up to 10 Televac vacuum sensors including cold cathode, convection, diaphragm, and thermocouple sensors. It also includes RS-232/RS-485/USB with and up to 8 optional set point relays. The user interface includes six touch controls and a high contrast, 180° viewing angle green OLED screen, which displays the units of measurement and the set point status simultaneously. Multiple gas types are supported. The MX200 is a modular unit, allowing you to choose a vacuum sensing solution specific to your needs.