7E Double Inverted Magnetron Cold Cathode Gauge - Vacuum Gauge

Part Number: 2-2142-0XX

The Televac 7E cold cathode gauge (also called a vacuum pressure gauge or cold cathode ionization gauge) has a measurement range from 10-8 Torr up to 10-2 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 7E 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 7E cold cathode ionization gauge can be operated by the Televac MX200 rack-mountable controller or as an active gauge via the MP7ER. Any vacuum controller will automatically operate the cold cathode to provide a full-range vacuum measurement solution when the 7E 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 7E cold cathode ionization gauge.

Televac 7E Cold Cathode Pressure Gauge (Vacuum Pressure 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
  • Interchangeable with 7F, 7FC, 7FCS
  • Excellent customer support
7E Double Inverted Magnetron Cold CathodePart NumberPriceBuy
1” Straight2-2142-013$460.00
NW25 (DN25 ISO-KF)2-2142-031$480.00
NW40 (DN40 ISO-KF)2-2142-032$485.00
2.75” CF (DN40 ISO-CF-F)2-2142-052$495.00
7E Coaxial CablesPart NumberPriceBuy
10'2-9841-010$145.00
20'2-9841-020$150.00
35'2-9841-035$155.00
50'2-9841-050$160.00
7E Coaxial High Temp/200˚CPart NumberPriceBuy
Custom Length, Max 300'2-9842-000$300.00

Replacement PartsPart NumberPriceBuy
7E Anode Assembly2-7900-075$210.00
O-Ring6-4210-260$3.50
Operating Range 1*10-8 Torr to 1*10-2 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 150 °C
Response Time ≤ 10 ms
Accuracy 1*10-7 Torr to 1*10-2 Torr: ± .2 decade

Analog Output Behavior

Televac vacuum pressure gauge cold cathode pressure gauge output graph, 7E, The Fredericks Company, 215 947 2500

7F Double Inverted Magnetron Cold Cathode Sensor – This sensor has a measurement range from 1 × 10-11Torr 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 7F is resistant to inrushes of gas. The design of this sensor allows for an extended range of measurement and high bakeout temperatures up to 400 °C. The 7F can be operated by several Televac controllers, including the MM200, MC300, and MP7FR. The MM200 and MC300 controllers automatically operate the cold cathode to provide a full-range vacuum measurement solution when the 7F is used in conjunction with rough vacuum sensors.

MP7ER Active Gauge – This gauge measures high vacuum from 1 × 10-8 Torr up to 1 × 10-2 Torr utilizing a double inverted magnetron sensor. It has a linear or logarithmic 0 V to 10 V analog output with a relay set point and an LED display of pressure.

MM200 Vacuum Sensor Controller – The MM200 controls any Televac vacuum sensor including cold cathode, convection, diaphragm, hot ion, and thermocouple sensors. It also has optional features including up to 8 relay set points and RS-232/RS-485 communications. The large, bright LED display makes it easy to read from a distance. The MM200 is a modular unit, allowing customers to choose a vacuum sensing solution specific to their needs.