Pressure metrology is the technology of transducing pressure into an electrical quantity. The sensor consists of a micro-machined silicon diaphragm with piezoresistive strain gauges diffused into it, fused to a silicon or glass backplate. Under the pressure-induced strain, the resistors change their value. Pressure sensing using diaphragm technology measures the difference in pressure of the two sides of the diaphragm. 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 | Keller |
| Fluids | Gases, Liquids, Vapor |
| Types | Gauge, Absolute, Differential |
| Max pressure & temperature | 1400 Bar and 300°C |
| Pressure range | 1 mbar to 1000 bar |
| Accuracy | 0.01% of full scale to 1% full scale |
| Rangeability | 50:1 |
| Options | High temperature, gold membrane, VCR fitting ... |
| Advantages | Accurate, Good quality price ratio |
| Limitations | Low design pressure < 50 mbar |
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