The pressure transmitter with diaphragm seals for sticky, corrosive or hot media
The PMP55 is the Cerabar pressure transmitter with diaphragm seal. Plants use it when direct contact with the process would damage the sensor – like in viscous, corrosive, or high-temperature fluids. It comes with one seal or two for differential pressure. The piezoresistive sensor gives good accuracy, and it's common in chemical, food, and pharma applications.
| Measuring principle | Piezoresistive sensor with diaphragm seal |
| Pressure type | Gauge, absolute |
| Process temperature | Up to +400 °C depending on seal and fill fluid |
| Pressure range | From 400 mbar to 400 bar |
| Accuracy | Up to ±0.075% |
| Output | 4–20 mA HART |
| Enclosure | IP66/67 |
Q: Why diaphragm seal?
A: Protects sensor from difficult media.
Q: Capillary length?
A: Various lengths available.
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