For pressure in the mbar ranges, a strain gauge diaphragm sensor is technically unsuitable. A large diameter capacitive sensor solves this problem. Rosemount is the leading manufacturer of such sensors in very large numbers for process industries. Depending on the reference pressure, we use the following terms:
Absolute Pressure Measurement referenced to a sealed, mostly an evacuated volume.
Relative Pressure Measurement referenced to atmospheric pressure.
Differential Pressure with 2 pressure ports for differential measurement of two pressures.
| Manufacturer | Rosemount, Emerson Process Management |
| Fluids | Gases, Liquids, Vapor |
| Types | Gauge, Absolute, Differential |
| Max pressure & temperature | 670 Bar and 300°C |
| Pressure range | 0 - 0.25 mbar and 0 - 670 bar |
| Accuracy | 0.025% of full scale to 0.1% full scale |
| Stability | 0.125% for 5 years |
| Options | Local indicator, remote seals, exotic material |
| Advantages | Very accurate measurement, quality / price ratio |
| Limitations | Size |
Serv'Instrumentation
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Impasse Louis VERD
69540 IRIGNY
FRANCE
Phone : +33 (0)4 78 51 47 50
Fax : +33 (0)4 78 51 59 96