The 221BD-00100A Baratron® Bakeable Differential Capacitance Manometer features 100 Torr (100 mm Hg) full scale pressure measurement and a 0.5 inch OD tube fitting. It offers a reliable, accurate, inexpensive solution to measuring low differential pressures. Operating on the variable capacitance technique, the 221 all-metal sensor contains a tensioned metal diaphragm, one side of which is exposed to the gas whose pressure is to be measured (Px side). The other side (reference, or Pr, side) is adjacent to an electrode assembly which is terminated in another like port. The diaphragm deflects with changing differential pressure, causing a capacitance change between the diaphragm and the adjacent electrode assembly. The capacitance change with pressure generates an AC voltage which is amplified, demodulated, and converted into a high level DC voltage output, linear with pressure, and calibrated against a pressure standard. The electronics of the 221 are housed remotely from the sensor, allowing it to be baked at 200°C (with interconnecting cable removed). An MKS or user-supplied power supply/readout is required to operate the 221.
120% of Full Scale or 20 psi (140 kPa), whichever is greater (for Full Scale ranges less than 1000 mmHg, the following restrictions apply: if high pressure is on the Px side of the sensor, the maximum differential overpressure allowable is 120% of Full Scale or 20 psi, whichever is greater, if high pressure is on the Pr side of the sensor, the maximum differential overpressure allowable is 120% of Full Scale Consult factory for higher Pr overpressure protection.)
Analog Output
0 - 10 VDC
Volume
Px side: 7.9 cc Pr side: 19.0 cc
Power Requirements
±15 VDC
Operating Temperature
Sensor: 0 - 150°C (bakeable to 200°C with cable removed), Preamp: 0 - 50°C
Operating Temperature Range
Sensor: 0 - 150°C (bakeable to 200°C with cable removed), Preamp: 0 - 50°C
120% of Full Scale or 20 psi (140 kPa), whichever is greater (for Full Scale ranges less than 1000 mmHg, the following restrictions apply: if high pressure is on the Px side of the sensor, the maximum differential overpressure allowable is 120% of Full Scale or 20 psi, whichever is greater, if high pressure is on the Pr side of the sensor, the maximum differential overpressure allowable is 120% of Full Scale Consult factory for higher Pr overpressure protection.)
Analog Output
0 - 10 VDC
Volume
Px side: 7.9 cc Pr side: 19.0 cc
Power Requirements
±15 VDC
Operating Temperature
Sensor: 0 - 150°C (bakeable to 200°C with cable removed), Preamp: 0 - 50°C
Operating Temperature Range
Sensor: 0 - 150°C (bakeable to 200°C with cable removed), Preamp: 0 - 50°C
Additional CAD file downloads are not available for this product.
221BD-00100A - Drawings
Additional drawings are not available for this product.
221BD-00100A
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