The 220DD Baratron® differential capacitance manometer is temperature controlled to 45°C for use in demanding, harsh environments. The Baratron® 220 includes all signal conditioning, power supply and is enclosed in a rugged, NEMA1 approved housing. It is available in ranges from 1 to 25,000 mmHg/Torr (500 psia). Accuracy is ±0.15% of Reading.
|Compare||Model||Drawings, CAD & Specs||Availability||Price|
|220DD-00001A2B Vacuum Pressure Transducer, Differential, 1 Torr, 0.5 in. Tube, NEMA1, 45C||$2,300||
|220DD-00001B2B Vacuum Pressure Transducer, Differential, 1 Torr, 8 VCR, NEMA1, 45C||$2,475||
|220DD-00001D2B Vacuum Pressure Transducer, Differential, 1 Torr, NW16 ISO-KF, NEMA1, 45C||$2,475||
|220DD-00010A2B Vacuum Pressure Transducer, Differential, 10 Torr, 0.5 in. Tube, NEMA1, 45C||$2,300||
|220DD-00010B2B Vacuum Pressure Transducer, Differential, 10 Torr, 8 VCR, NEMA1, 45C||$2,475||
|220DD-00010D2B Vacuum Pressure Transducer, Differential, 10 Torr, NW16 ISO-KF, NEMA1, 45C||$2,475||
|220DD-00100A2B Vacuum Pressure Transducer, Differential, 100 Torr, 0.5 in. Tube, NEMA1, 45C||$2,300||
|220DD-00100B2B Vacuum Pressure Transducer, Differential, 100 Torr, 8 VCR, NEMA1, 45C||$2,475||
|220DD-00100D2B Vacuum Pressure Transducer, Differential, 100 Torr, NW16 ISO-KF, NEMA1, 45C||$2,475||
220DD Baratron® Differential Pressure Transducers are available with the following options.
|Configuration Option||Option Code|
|220DD Differential Capacitance Manometer||220DD|
|Range Full Scale|
|0.5 in. OD tube||A|
|8 VCR female||B|
|1.33 in. OD CF, rotatable||C|
|0-10 VDC and 4-20 mA||B|
These capacitance manometers are temperature controlled to 45°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.
Differential capacitance manometers can be connected to any pressure or vacuum source for use as the reference pressure. These manometers read the difference in pressure between the inlet tube and the reference cavity at the backside of the electrode. Differential pressure transducers can be used to measure either the true differential pressure or vacuum between two locations, or the reference side of the product can be left open to provide a true reference to local atmospheric pressure. Applications include air and gas flow measurements for filters and analytical systems, downstream pressure control in thin film processing systems, and automated leak testing systems.
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.
These Baratron® capacitance manometers feature two simultaneous 0 to 10 VDC and 4 to 20 mA analog pressure outputs to interface with common process control systems. The 0-10 VDC signal allows it to be used as a pressure transducer, while the 4-20 mA signal supports use as a pressure transmitter.
All pressure sensor components and electronics are housed in a rugged, NEMA 1 rated enclosure for protection when used in harsh industrial environments.
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.