2A VacuMini Thermocouple Vacuum Gauge Tube (Pirani)

Part Number: 2-2100-102

The Televac 2A VacuMini is a commercial version of Televac’s highly successful NASA 2A gauge. Our 2A VacuMini thermocouple vacuum gauge tube (also often called a Pirani or vacuum pressure gauge) is widely considered our most robust and contamination resistant low vacuum pressure gauge 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 VacuMini is roughly half the size and volume of traditional thermocouple vacuum gauge tubes. This thermocouple vacuum gauge’s primary limitation is that with all of our vacuum controllers, this thermocouple vacuum transducer 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).

This vacuum gauge also has slightly reduced accuracy over some parts of its operating range when compared to the 4A convection Pirani vacuum gauge. The VacuMini vacuum pressure gauge can be operated by several Televac controllers, including the MX200, MM200, MC300, B2A, Compact 2A, Vacuguard, and MV2A.

Why would you choose the 2A VacuMini thermocouple vacuum gauge tube? An excellent question. Below is a list of some of the highlights of this vacuum transducer:

Televac 2A VacuMini Thermocouple Vacuum Gauge Tube (Pirani) Features

  • Compact, robust, contamination resistant vacuum transducer
  • Standard Pirani 1/8″ NPT flange/fitting
  • Weather capped vacuum transducer with gasket and tether
  • Drop-in vacuum pressure gauge replacement
  • Excellent customer support for vacuum transducers
  • Convection gauge filters available for highly contaminated environments
2A VacuMiniPart NumberPriceBuy
VacuMini 2A Sensor 1/8" (0.125”) NPT SST (with cap, chain)2-2100-102$140.00
VacuMini 2A Sensor 1/8" (0.125”) NPT SST (without cap, chain)2-2100-102-01$115.00
Replacement PartsPart NumberPriceBuy
Cap and chain6-4200-111$28.00
Operating Range 1 mTorr to 20 Torr (1 μ to 20,000 μ)
Body Material 304 series stainless steel
Vacuum Connection 1/8” NPT
Leak Rate 1*10-9 std. cc/s (He) or less
Overpressure Rating 100 psig

Analog Output Behavior

Televac thermocouple vacuum gauge vacuum transducer vacuum pressure gauge
MX200 MC300 Compact 2A 2A NASA Thermocouple
Measurement Range 1*10-11 to 10,000 Torr 1*10-11 to 1000 Torr 1*10-3 to 20 Torr 1*10-3 to 20 Torr
Communications RS-232/RS-485/USB None None None
Analog Output 0 to 10 V DC (1 per sensor) 0 to 10 V DC (1 per sensor) 0 to 10 V DC Controller dependent
Programmable Set Points 0, 4, or 8 4 None None

The VacuMini is ideally suited to applications where the vacuum vessel is located outdoors or in a physical environment that renders use of traditional thermocouple sensors impractical. Examples of such applications include:

  • Fixed and mobile bulk cryogenic storage and transport vessels
  • Vacuum jacketed gas delivery manifolds
  • Mechanical vacuum pumps and blowers
  • House vacuum systems