628H 0.05-25,000 Torr, Heated (100°C) Absolute Baratron® Capacitance Manometers
Overview
628H 0.05-25,000 Torr, Heated (100°C) Absolute Baratron® Capacitance Manometers are temperature controlled to 100°C, accurate to 0.25% of Reading and includes updated temperature control electronics to provide superior long-term stability and repeatability. Optional heater and temperature status LED/switches indicate that the heater is in control.
- Temperature controlled to 100°C for up to 0.25% of reading accuracy
- 0 to 10 VDC analog output proportional to absolute pressure
- Full Scale ranges low as 50 mTorr for precise low pressure measurement
- All-Inconel corrosion-resistant wetted surfaces
- Integrated sump (US patent #5,822,685) provides particle protection
- Measures total pressure directly, independent of gas composition
Products
| Compare | Description | Drawings, CAD & Specs | Availability | Price | |||
|---|---|---|---|---|---|---|---|
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Heated Capacitance Manometer, 0.1 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Vertical Calibration
$2,664
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628H.1TBF2B Heated Capacitance Manometer, 0.1 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Vertical Calibration | $2,664 |
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Heated Capacitance Manometer, 0.1 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Horizontal Calibration
$2,663
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628H.1TBF6B Heated Capacitance Manometer, 0.1 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Horizontal Calibration | $2,663 |
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Heated Capacitance Manometer, 0.1 Torr, 100°C, NW16 ISO-KF, DB15 w/Thread Lock, 0-10 VDC, Horizontal Calibration
$2,519
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628H.1TDF5B Heated Capacitance Manometer, 0.1 Torr, 100°C, NW16 ISO-KF, DB15 w/Thread Lock, 0-10 VDC, Horizontal Calibration | $2,519 |
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Heated Capacitance Manometer, 10 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration
$2,518
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628H11TBE1B Heated Capacitance Manometer, 10 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration | $2,518 |
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Heated Capacitance Manometer, 10 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Vertical Calibration
$2,663
|
628H11TBE2B Heated Capacitance Manometer, 10 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Vertical Calibration | $2,663 |
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Heated Capacitance Manometer, 10 Torr, 100°C, NW16 ISO-KF, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration
$2,518
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628H11TDE1B Heated Capacitance Manometer, 10 Torr, 100°C, NW16 ISO-KF, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration | $2,518 |
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Heated Capacitance Manometer, 1,000 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration
$2,519
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628H13TBE1B Heated Capacitance Manometer, 1,000 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration | $2,519 |
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Heated Capacitance Manometer, 1,000 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Vertical Calibration
$2,663
|
628H13TBE2B Heated Capacitance Manometer, 1,000 Torr, 100°C, 8 VCR-F, DB15 w/Thread Lock, 0-10 VDC, Status LEDs, Vertical Calibration | $2,663 |
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|||
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Heated Capacitance Manometer, 1,000 Torr, 100°C, NW16 ISO-KF, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration
$2,519
|
628H13TDE1B Heated Capacitance Manometer, 1,000 Torr, 100°C, NW16 ISO-KF, DB15 w/Thread Lock, 0-10 VDC, Vertical Calibration | $2,519 |
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Configuration Options
The following options are available for 628H Baratron® Heated Absolute Capacitance Manometers
Ordering Code Example: 628H01TBE1B
| Configuration Option | Option Code |
|---|---|
| 628H Absolute Capacitance Manometer. | 628H |
Full Scale Range |
|
| 0.05 Torr | U5T |
| 0.1 Torr | .1T |
| 0.25 Torr | RET |
| 1 Torr | 01T |
| 2 Torr | 02T |
| 10 Torr | 11T |
| 20 Torr | 21T |
| 100 Torr | 12T |
| 1000 Torr | 13T |
| 2000 Torr | 23T |
| 5000 Torr | 53T |
| 10000 Torr | 14T |
| 15000 Torr | RBT |
| 20000 Torr | 24T |
| 25000 Torr | RCT |
Fittings |
|
| 0.5 in. OD Tube | A |
| 8 VCR female | B |
| 1.33 in. OD CF | C |
| NW16 ISO-KF (range < 5000 Torr) | D |
| 8 VCO female | E |
| 2.75 in. OD CF | L |
| NW25 ISO-KF (range < 5000 Torr) | Q |
Accuracy |
|
| 0.25% of Reading | E |
| 0.5% of Reading | F |
Options |
|
| Standard Configuration, vertical calibration 1 (ranges = 1 Torr) | 1 |
| Optional Temperature/Heater Status, vertical calibration | 2 |
| Standard Configuration, horizontal calibration 5 (ranges <1 Torr only) | 5 |
| Optional Temperature/Heater Status, horizontal calibration (ranges <1 Torr only) | 6 |
Connector |
|
| 15 pin Type "D" with Thread Locks | B |
| 15 pin Type "D" with Slide Locks | P |
Specifications
-
TypeVacuum/pressure Transducer
-
Measurement TypeAbsolute
-
Sensor TemperatureControlled to 100°C
-
Full Scale Pressure Ranges0.05, 0.1, 0.25, 1, 2, 10, 20, 100, 1000, 2000, 5000, 10000, 15000, 20000, 25000 Torr
-
Accuracy0.25% of reading for 1-25,000 Torr
0.50% of reading for 0.25, 0.1, and 0.05 Torr -
Resolution0.001% of Full Scale (0.002% of Full Scale for 0.05 Torr)
-
Analog Output0-10 VDC into >10K Ω load
-
Analog Connector15-pin D-sub
-
Zero Temperature Coefficient0.002% of Full Scale/°C for 1-25,000 Torr
0.01%/°C of Full Scale for 0.25 and 0.1 Torr
0.02%/°C of Full Scale for 0.05 Torr
-
Span Temperature Coefficient0.02% of Reading/°C
-
Operating Temperature Range15-50°C
-
Volume6.3 cc
-
Warm-up Time2 hours for 1-25,000 Torr ranges, 4 hours for ranges <1 Torr
-
Overpressure Limit45 psia (310 kPa) or 120% Full Scale, whichever is greater
-
Materials Exposed to Process GasesInconel®
-
Power Requirements±15 VDC ±5% @ 0.6 Amps (maximum)
-
ComplianceCE
Features
Baratron® Capacitance Manometer Technology
Capacitance manometers are electro-mechanical gauges that can measure both pressure and vacuum. The capacitance gauge translates a pressure-modulated movement in a thin diaphragm into an electrical signal proportional to the pressure. The pressure sensor is the thin diaphragm that is exposed to the pressure or vacuum being measured via the inlet tube. An electrode is mounted in the reference cavity behind the diaphragm. Pressure differences between the process and the reference cavity deflect the diaphragm slightly, changing the distance between it and the electrode. Variations in this distance produce variations in the capacitance between the diaphragm and the electrode creating an electrical signal that is proportional to the pressure change. Since differences in the capacitance signal are produced by physical changes within the manometer and not by changes in the gas properties, pressure measurements by the capacitance manometer are independent of the composition of the gas being measured.
Gas independent pressure measurement with a Baratron® capacitance manometer. Schematic shows the internal components and functional zones.
Percent of Reading Accuracy
Accuracy is specified as a percent of Reading, not Full Scale, as seen in some of the lower performance devices. Percent of Reading accuracy provides you with an even more accurate output signal in the lower scale of the pressure range, where it is needed most.
Internally Heated to 100°C
These capacitance manometers are temperature controlled to 100°C for improved accuracy. Unheated versions are exposed to ambient temperature variations which can degrade the sensor accuracy. These devices have the sensor enclosed in a volume that is maintained at a constant temperature above ambient. This solution improves the manometer’s accuracy and repeatability and lowers instrument drift by reducing or eliminating process contamination within the manometer. Heated manometers are recommended for applications that require maximum accuracy and repeatability, operate above ambient temperature and for those processes that employ hot gases.
The pressure sensor is located inside a 100°C constant temperature oven for improved pressure measurement accuracy.
Absolute Pressure Measurement
These Baratron® pressure transducers are referenced to vacuum for absolute pressure measurement. Applications include: vacuum furnaces, freeze-drying of fruits and vegetables, gas lasers, automotive component testing, bottle coatings, and vacuum distillation.
All-Inconel® Wetted Surfaces
These pressure transducers feature all Inconel® construction of the pressure sensor allowing it to operate without damage in virtually any chemical environment, including exposure to halogens, deionized water and steam, and ozone.
0 to 10 VDC Proportional Analog Output
These Baratron® capacitance manometers feature a high-level 0-10 VDC analog output signal that is linear with pressure. This analog output can be interfaced with an MKS pressure controller, an MKS power supply/display instrument, or any instrument that meets these requirements.
Type "D" Pin-Out Assignments
| Pin | Description |
|---|---|
| 2 | Pressure Output |
| 5 | Power Common |
| 6 | -15 VDC |
| 7 | +15 VDC |
| 12 | Pressure Common |
| 15 | Chassis Ground |
All other pins are no connection.
Resources
Literature
- 628H Heated (100°C) Absolute Baratron® Capacitance Manometer (2.1 MB, PDF)
- 628H Heated (100°C) Baratron® Capacitance Manometer with 24 VDC and Profibus® Options (2.1 MB, PDF)
- Analog 600 Series Absolute Baratron® Capacitance Manometer Selection Guide (2.9 MB, PDF)
Manuals
- MKS 628H Transducer Manual (564.7 kB, PDF)
- 626, 627, 628, E27 & E28 Capacitance Manometer Pin-outs (22.4 kB, PDF)
Drawings & CADs
- 628 Dimensional Drawing (126.9 kB, PDF)
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