What the PMD63B Is Designed to Measure
The PMD63B is built around a differential pressure measuring cell with a range of 100 mbar to 40 bar and a minimum calibrated span of 5 mbar. This makes it suitable for processes where the static pressure may be high, but the required measurement is a relatively small pressure difference.
It is typically applied to:
- Hydrostatic level measurement in pressurized vessels
- Differential pressure monitoring across process lines
- Filter and heat exchanger condition monitoring
- Small differential pressure detection under high static pressure
- Level measurement where capillaries and diaphragm seals are required
- Hygienic level and pressure monitoring in food, beverage and pharmaceutical processes
Why Capillaries and Diaphragm Seals Matter
The PMD63B becomes especially useful when the transmitter cannot be mounted directly at the process tapping. By adding one or two capillaries together with diaphragm seals, the sensor can be positioned away from high-temperature zones, corrosive media or confined installation spaces.
TempC diaphragm technology helps reduce temperature-induced effects on the measuring element. This is relevant for batch, CIP or SIP-related operations where process temperature changes can otherwise affect differential pressure readings.
Accuracy and Stability for Differential Pressure Loops
| Parameter | PMD63B |
|---|---|
| Measurement principle | Differential pressure |
| Sensor range | 100 mbar…40 bar (1.5 psi…600 psi) |
| Minimum calibrated span | 5 mbar (0.075 psi) |
| Span ratio | Up to 100:1 |
| Reference accuracy | Up to 0.075 % |
| Long-term stability | 0.025 % URL/year; 0.05 % URL/5 years; 0.10 % URL/10 years |
| Process temperature | -40…+250 °C (-40…+482 °F) |
| Ambient temperature | -40…+85 °C (-40…+185 °F) |
| Maximum overpressure limit | 240 bar (3600 psi) |
| Vacuum resistance | 50 mbar (0.73 psi) |
The combination of a 5 mbar minimum span and up to 100:1 span ratio allows the PMD63B to resolve small pressure differences even when the process is subject to higher line pressure. Long-term stability of 0.025 % URL/year helps reduce recalibration frequency over the device lifecycle.
Integration into Control and Asset Management Systems
For automation integration, the PMD63B can be connected via 4…20 mA HART, PROFIBUS PA or PROFINET over Ethernet-APL. Ethernet-APL enables high-speed two-wire digital communication, while HART and PROFIBUS PA remain suitable for existing plant infrastructures.
Guided wizards assist with configuration, and HistoROM stores device and process data for later review. Heartbeat Technology supports in-situ verification, so maintenance teams can check device status without removing the transmitter from the process. Optional Bluetooth connectivity allows wireless access through the SmartBlue app when the relevant module is installed.
Materials, Process Connections and Approvals
| Item | PMD63B |
|---|---|
| Process membrane | 316L |
| Gasket materials | PTFE, FKM, EPDM, FFKM |
| Fill fluids | Silicone oil, vegetable oil, high-temperature oil |
| Housing | Aluminum, 316L hygienic |
| Industrial process connections | Flange DN50…80, NPS 1-1/2"…3"; DIN11852 DN50…80; DRD; SMS 1-1/2"…2" |
| Hygienic connections | Tri-Clamp 1-1/2"…3", Varivent, NEUMO BioControl D50…80, Universal adapter, Sanitary Tank Spud 2"…6" |
| Explosive atmosphere approvals | ATEX, CAN/US Ex, IECEx, JPN Ex, KC Ex, EAC Ex, INMETRO, NEPSI, UK Ex |
| Safety and hygienic approvals | SIL; EN 10204-3.1; ASME-BPE, cGMP, 3A, EHEDG; KTW, NSF drinking water approval |
These options allow the PMD63B to be used in general industrial differential pressure applications as well as in hygienic processes where sanitary connections and documented material traceability are required.
To receive a quotation for the Endress+Hauser Deltabar PMD63B, please send the complete manufacturer type code. We quote according to the exact selection code provided.We will check the code and return pricing accordingly.
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