Compare Description Drawings, CAD & Specs Full Scale Range Fitting Type Electrical Connector Availability Price
aa01a baratron 1-1000 torr absolute capacitance manometer
1 Torr NW16 ISO-KF 15-pin D-sub male with screw locks
aa01a baratron 1-1000 torr absolute capacitance manometer
10 Torr 0.5 in. OD tube 15-pin D-sub male with screw locks
aa01a baratron 1-1000 torr absolute capacitance manometer
100 Torr NW25 ISO-KF 15-pin D-sub male with screw locks
aa01a baratron 1-1000 torr absolute capacitance manometer
1000 Torr NW16 ISO-KF 15-pin D-sub male with screw locks

Configuration Options

aa01a baratron 1-1000 torr absolute capacitance manometer AA01A Absolute Capacitance Manometer, 1-1000 Torr, 0-10 VDC, DB15


  • Type
    Pressure Transducer
  • Measurement Type
  • Full Scale Pressure Ranges
    1, 2, 10, 20, 100, 500, 1000 Torr and metric equivalents
  • Fitting Type
    1/2 inch OD tube standard, other types optional
  • Analog Output
    0 - 10 VDC into >10 kΩ load
  • Electrical Connector
    15-pin D-subminiature standard, terminal block adapter optional
  • Accuracy
    0.25% for 1 to 1000 Torr (0.15% optional)
  • Resolution
    0.002% of Full Scale
  • Zero Temperature Coefficient
    0.005% Full Scale/°C for 10-1000 Torr ranges
    0.010% Full Scale/°C for 2 Torr range
    0.015% Full Scale/°C for 1 Torr range
  • Span Temperature Coefficient
    0.04% of Reading/°C
  • Operating Temperature
    0 to 50°C
  • Overpressure Limit
    45 psia (310 kPa)
  • Volume
    1/2 inch Tube: 6.29 cm3
    8 VCR: 8.605 cm3
  • Materials Exposed to Process Gases
    Inconel and Incoloy nickel alloys
  • Power Requirements
    15 to 30 VDC @ 35 mA
  • Compliance


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.

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.

Inconel® and Incoloy® Construction

These pressure transducers feature Inconel® and Incoloy® nickel alloy construction of the pressure sensor allowing it to operate without damage in virtually any chemical environment, including halogens, deionized water and steam, and ozone. The sensor is fully welded with no intermediate brazing or joining materials.

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