The AA07A Micro-Baratron® is a higher accuracy, single-end pressure transducer offering superior value and performance. The building block design of Micro-Baratron® pressure transducers make custom configuration easy. A highly accurate and stable sensor with sophisticated electronics optimize performance with EMI/RFI insensitive, high level output. The AA07A offers enhanced accuracy, long term stability and low temperature coefficients for repeatability important in today's gas measurement applications.
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The following options are available for the AA07A Micro-Baratron® High Pressure Single-end Pressure Transducer.
|Configuration Option||Option Code|
|AA07A Single-ended Pressure Transducer||AA07A|
|Pressure Range Full Scale*|
|½” weld stub||BA|
|¼” weld stub||BB|
|¼” Butt-welded “T”||BD|
|4 VCR male, rotatable||CB|
|4 VCR female||CD|
|1% of Reading||G|
|9-pin type D at end of 9” flying lead||A|
|15-pin high density type D at end of 9” flying lead||C|
|Bendix 4-pin at end of 9” flying lead||D|
|6’ flying leads||F|
|10’ flying leads||L|
|Bendix 4-pin 4-20 mA on pins A&B||H|
|LDM-C (Red LED), 0-5 VDC and 0-10 VDC with high density D connector||T|
|LDM-C (with Blank Cover), 0-5 VDC and 0-10 VDC with high density D connector||W|
|Standard enclosure (indoor use)||1|
|Optional NEMA 4 enclosure for water, ice and dust||4|
* Other engineering units available (i.e. KPa). Consult Applications Engineering for additional information
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.
The AA07A/AA08A transducers are ideally suited for use in delivery systems that feed ultrapure gases to critical process systems. Their wetted surfaces exposed to the gas stream have a finish of better than 5 µin Ra. These transducers exhibit superior dry-down characteristics, and contribute no particles above background. After manufacture and assembly, they are purged with ultraclean nitrogen prior to double bagging in a class 100 environment.
The all-Incoloy® construction of the sensors in the AA07A/ AA08A allows for high overpressure tolerances that reduce errors due to line pressure spikes. High burst pressure ratings contribute to overall system safety. On existing gas cabinets and process systems, field replacement of common dial gauges or lower performance transducers is made easy due to the small size, industry standard endto-end lengths, and electrical interface choices of these transducers.
The optional local integrated display provides a digital readout of the line pressure at the transducer. The display, which is available on the 1000 Torr, 100 and 250 PSIA ranges with the 0-10 VDC output signal, provides a highlyvisible red LED display of the pressure and the units of measurement. The display can also be switched to show any of four different units (PSIA, Torr, bar, and kPa) without requiring recalibration or re-ranging of the transducer itself. It takes its power from the incoming transducer voltage, so no additional cables are required.