Part Numbers: 2-8930-101, 2-8930-110, 2-8930-111, 2-8930-116, 2-8930-125, 2-8930-130 2-8930-131, 2-8930-132, 2-8930-150, 2-8930-152
Compatible With: MX Active Gauge EthernetIP Gateway
Features and Benefits:
- Low cost digital vacuum gauge
- Very compact digital vacuum gauge
- Easy-to-read color OLED digital vacuum gauge display
- Excellent resolution and repeatability convection gauge (Pirani)
- Superior unit-to-unit performance between vacuum gauges
- Excellent customer support for vacuum gauges
The Televac® MX4A Active Vacuum Gauge (also called a convection vacuum gauge, analog vacuum gauge, digital vacuum gauge, convection, or Pirani gauge) utilizes an easily replaceable Televac® 4A convection vacuum gauge. This digital vacuum gauge has a variety of features including a pressure measurement range from 1*10-4 Torr up to 1000 Torr, RS-485 communications, two programmable set points, and a selectable 0 to 10 V DC analog vacuum gauge output.
The bright OLED digital vacuum gauge display makes it easy to read from a distance. Options on this Pirani gauge can be set from four touch controls on the top of the unit or through RS-485 communications (or EthernetIP if you add in an EthernetIP gateway). This vacuum gauge offers an extensive selection of fittings, simple use, ease of sensor replacement, and low cost making it an excellent choice for a variety of vacuum applications.
MX4A Convection Active Vacuum Gauge
D-Sub 15, 15 Conductor Cables (Flying Leads)
D-Sub 15, 6 Conductor Cables (Flying Leads)
Wall Power Supply
| Operating Range | 1*10-4 Torr to 1000 Torr | Display | OLED |
| Digital Communications | RS-485 |
| Analog Output | Selectable 0 V DC to 10 V DC |
| Programmable Set Points | 2 |
| Set Point 1 | Open collector |
| Set Point 2 | Relay |
| Supply Voltage | 22 V DC to 26 V DC |
| Maximum Power | 8 W |
| Calibration Medium | Dry air or nitrogen |
| Overpressure | 150 PSI |
| Digital Output Resolution | 2 significant digits with exponent |
| Analog Output Resolution | 16 bits |
| Operating Temperature | 0 °C to 50 °C |
| Storage Temperature | -20 °C to 60 °C |
| Bakeout Temperature | |
| Brass (PN: -110, -116, -125) | 100 °C (electronics removed) |
| Stainless Steel (PN: All Others) | 200 °C (electronics removed) |
| Display Readable Distance | 3 m (10 ft) |
| Accuracy (Vertical Mount) | |
| 0.1 mTorr to 1 mTorr | 0.1 mTorr resolution |
| 1 mTorr to 10 mTorr | ±1 mTorr |
| 10 mTorr to 1000 Torr | ±10% of reading |
| Analog Output | ±10 mV |
| Pin | Description |
| 1 | Analog Out (Ground) |
| 2 | RS-485 A (-) |
| 3 | SP2 NC |
| 4 | SP2 NO |
| 5 | SP1 Open Drain |
| 6 | Floating |
| 7 | Floating |
| 8 | Supply Voltage (+) |
| 9 | Analog Out (0 to 10) V |
| 10 | RS-485 B (+) |
| 11 | SP2 Com |
| 12 | SP1 Source |
| 13 | Floating |
| 14 | Floating |
| 15 | Supply Voltage (-) |
| *0S1<CR> | Read vacuum measurement |
| *0R1<CR> | Read units of measurement |
| *0R2<CR> | Read SP1L and SP1H |
Assume address 0
Full list of commands is available in the instruction manual.
The MX4A has two set points. Set point 1 is an N-Channel 60 V MOSFET open collector. It has a maximum current rating of 1 A. The datasheet can be found at www.vishay.com/en/product/69958.
Set point 2 is a relay with a maximum switching voltage of 220 V DC (250 V AC) and a maximum switching current of 2 A. The datasheet can be found at www.te.com/catalog/pn/en/1393788-3.
| MX4A PN: -110, -116, -125 | MX4A PN: All Others |
| Nickel | Nickel |
| Glass | Glass |
| Gold | Gold |
| Tophet | Tophet |
| Cupron | Cupron |
| Solder | Stainless Steel |
| Housing | Aluminum |
| Electrical Connections | D-Sub 15-pin male |
| Weight with Sensor (typical) | 350 g (0.77 lbs) |
| Weight without Sensor | 200 g (0.44 lbs) |
| Certified to CAN/CSA C22.2 No. 61010-1-12 |
| CE certified to EN 61010-1, EN 61236-1, EN 55011 |
| RoHS compliant |
| IP40 |
| EAC certified |
| NIST traceable calibration optional |
Product Documentation
| MX4A Datasheet |
| MX4A Instruction Manual |
| Televac®️ Vacuum Calibration Tolerances |
3D Models (STEP Files)
| MX4A NW25/KF25 Nickel-Plated Brass – PN: 2-8930-125 STEP File |
| MX4A NW25/KF25 Stainless Steel – PN: 2-8930-131 STEP File |
Application Notes
Videos
| MX4A Product Overview Video |
| MX4A Demonstration Video |
| MX2A/MX4A Sensor Replacement Video |
Tools
| Televac® Vacuum Measurement Converter |
Brochures
| MX4A Features and Benefits Brochure |
| Full Range Solutions for Vacuum Furnaces Brochure |
| Televac®️ Product Catalog |
MX4A Convection Active Vacuum
Gauge Quantity Discounts
| Quantity | Discount |
| 1 | List |
| 5 | 2% |
| 10 | 5% |
| 15 | 7% |
| 20 | 10% |
| 25 | 13% |
| 30 | 15% |
| 50 | 18% |
| 75+ | 20% |
D-Sub 15 Cable Quantity Discounts
| Quantity | Discount |
| 1 | List |
| 50 | 5% |
| 75 | 10% |
| 100 | 15% |
| 125 | 20% |