Part Number: 2-2100-10, 2-2100-0XX, and 2-2126-0XX
Our 2A 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 thermocouple vacuum pressure gauge tube’s primary limitation is that with all of our vacuum controllers, this thermocouple vacuum pressure 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).
This vacuum pressure gauge also has slightly reduced accuracy over some parts of its operating range when compared to the 4A convection Pirani vacuum gauge. The 2A vacuum pressure gauge can be operated by several Televac controllers, including the MX200, MM200, MC300, MX2A, B2A, Compact 2A, Vacuguard, and MV2A. With the MX2A, the full measurement range from 1*10-3 Torr (1 micron) to 1000 Torr (1,000,000 microns) is available.
Why would you choose the 2A thermocouple vacuum gauge tube? An excellent question. Below is a list of some of the highlights of this vacuum transducer:
Televac 2A Thermocouple Vacuum Pressure Gauge Tube (Pirani) Features
- Low cost Pirani vacuum pressure gauge
- Compact, robust, contamination resistant vacuum pressure gauge
- Numerous vacuum transducer fittings available (1/8″ NPT, NW25, NW40, CF40, among many others)
- Drop-in vacuum pressure gauge replacement
- Excellent customer support for vacuum pressure gauges
- Convection gauge filters available for highly contaminated environments
| 2A Thermocouple | Part Number | Price | Buy |
|---|---|---|---|
| 1/8” NPT Nickel-plated Brass | 2-2100-10 | $75.00 | |
| NW16 (DN16 ISO-KF) Nickel-plated Brass | 2-2100-016 | $100.00 | |
| NW25 (DN25 ISO-KF) Nickel-plated Brass | 2-2100-025 | $100.00 | |
| 1/8” NPT Stainless Steel | 2-2126-001 | $190.00 | |
| NW16 (DN16 ISO-KF) Stainless Steel | 2-2126-030 | $195.00 | |
| NW25 (DN25 ISO-KF) Stainless Steel | 2-2126-031 | $195.00 | |
| 8-VCO Male Stainless Steel | 2-2126-040 | $200.00 | |
| 8-VCO Female Stainless Steel | 2-2126-041 | $200.00 | |
| 8-VCR Male Stainless Steel | 2-2126-042 | $200.00 | |
| 8-VCR Female Stainless Steel | 2-2126-043 | $200.00 | |
| 4-VCR Male Stainless Steel | 2-2126-044 | $200.00 | |
| 4-VCR Female Stainless Steel | 2-2126-045 | $200.00 | |
| 1.33” CF (DN16 ISO-CF-F) Stainless Steel | 2-2126-050 | $200.00 | |
| 2.75” CF (DN40 ISO-CF-F) Stainless Steel | 2-2126-052 | $205.00 |
| Operating Range | 1*10-3 Torr to 20 Torr |
| Operating Range (MX2A) | 1*10-4 Torr to 1000 Torr |
| Analog Output | Controller dependent |
| Maximum Voltage | 5 V |
| Maximum Power | 55 mW |
| Maximum Filament Temperature | 250 °C |
| Mounting Orientation | |
| 1 × 10-3 Torr to 20 Torr | Any |
| 20 Torr to 1000 Torr | Vertical |
| Calibration Medium | Dry air or nitrogen |
| Overpressure | 150 psi |
| Analog Output Resolution | Controller dependent |
| Operating Temperature | 0 °C to 50 °C |
| Storage Temperature | -40 °C to 85 °C |
| Maximum Bakeout Temperature | 120 °C (brass) 200 °C (stainless steel) |
| Response Time | ≤2 s |
| Accuracy | |
| 1 mTorr to 10 mTorr | ±1 mTorr |
| 10 mTorr to 100 mTorr | ±10% of reading |
| 100 mTorr to 1 Torr | ±20% of reading |
| 1 Torr to 20 Torr | Indication only |
| Accuracy (MX2A) | |
| 0.1 mTorr to 1 mTorr | 0.1 mTorr resolution |
| 1 mTorr to 10 mTorr | ±1 mTorr |
| 10 mTorr to 10 Torr | ±10% of reading |
| 10 to 100 Torr | ±30% of reading (vertical mount) |
| 100 Torr to 1000 Torr | ±10% of reading (vertical mount) |
Analog Output Behavior
 |
 |
 |
 |
|
| MX2A Thermocouple | MX200 | MC300 | VacuGuard™ | |
| Measurement Range | 1*10-4 to 1000 Torr | 1*10-11 to 10,000 Torr | 1*10-11 to 1000 Torr | 1*10-3 to 20 Torr |
| Communications | RS-485 | RS-232/RS-485/USB | None | None |
| Analog Output | Configurable 0 to 10 V DC | 0 to 10 V DC (1 per sensor) | 0 to 10 V DC (1 per sensor) | None |
| Programmable Set Points | 2 | 0, 4, or 8 | 4 | None |