Technical Data
CompareContinuous / Liquids
| Measuring Principle | Absolute and gauge pressure |
| Characteristic / Application | Cost-effective pressure transducer, piezoresistive sensor with metallic measuring diaphragm |
| Supply / Communication | 10…30 VDC |
| Accuracy | 0.3% |
| Long term stability | 0.2% of URL/year |
| Ambient temperature | -40…+85°C (-40…+185°F) |
| Process temperature | -40…+100°C (-40…+212°F) |
| Process pressure / max. overpressure limit | 600 bar (9000 psi) |
| Pressure measuring range | 400 mbar…+400 bar (6...+6000psi) |
| Process connection | Thread: G1/4, G1/2, MNPT1/4, MNPT1/2, DIN13, JIS R1/2 |
| Communication | 4...20 mA, IO-Link |
| Certificates / Approvals | ATEX, FM, CSA, IEC Ex, NEPSI, UK Ex |
| Design approvals | EN 10204-3.1 Final inspection report Cleaned from oil and grease |
| Marine approval | DNV/ GL/ ABS/ LR/ RINA |
Pressure
| Measuring Principle | Absolute and gauge pressure |
| Characteristic | Cost-effective pressure transducer, piezoresistive sensor with metallic measuring diaphragm |
| Supply voltage | 10…30 VDC |
| Reference Accuracy | 0.3 % |
| Long term stability | 0.2 % of URL/year |
| Process temperature | -40 °C…+100 °C (-40 °F…+212 °F) |
| Ambient temperature | -40 °C…+85 °C (-40 °F…+185 °F) |
| Measuring cell | +400 mbar…+400 bar (+6 psi...+6000 psi) |
| Max. overpressure limit | 600 bar (9000 psi) |
| Process connection | Threads: G1/4, G1/2, MNPT1/4, MNPT1/2, DIN13, JIS R1/2 |
| Communication | 4...20 mA, IO-Link |
| Certificates / Approvals | ATEX, FM, CSA, IEC Ex, NEPSI, UK Ex |
| Design approvals | EN 10204-3.1 Final inspection report Cleaned from oil and grease |
| Marine approvals | DNV/ GL/ ABS/ LR/ RINA |
The Cerabar PMP21 is a highly cost-effective ultra-compact pressure transmitter. It uses a piezoresistive sensor with an absolute or gauge pressure measuring range of 400 mbar..100 bar. The PMP21 can measure under demanding conditions in the process industry, with a maximum degree of protection of IP68 and high-quality materials (e.g. 316L). Numerous approvals (e.g. explosion protection approval or marine approval) make it suitable for most measuring applications.
Advantages
Ultra-compact design and user-configurable measuring range allow simple, time-saving instrument installation and setup in the plant
Reference measuring accuracy of 0.3% with high long-term stability and high repeatability, ensuring high-quality process monitoring
Made entirely of 316L for improved process compatibility; versions with IP68 degree of protection can be used submerged in water
The PMP21 has numerous explosion protection and marine approvals, and an EN10204 3.1 material certificate is also available to meet documentation, traceability and device safety requirements
Application areas
Pressure transmitter with piezoresistive metal diaphragm for absolute or gauge pressure measurement of gases or liquids.
Process connection: thread
Process temperature: -40...+100°C (-40...+212°F)
Process pressure: 400 mbar...+100 bar (6...1,500 psi)
Measuring accuracy: ±0.3% of full scale
International explosion protection approval, marine approval
Spare Parts & Accessories 14
14 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 52009800 | flat sealing gasketSet of process gaskets Viton for Cerabar M/Cerabar S, metal cell | Details |
| 71286350 | Seal kitConsists of: gasket 18.5x23.9x1.5 FKM. O-ring 14x1.78, FKM. Usage: PMP11, PMP21, PMP51, PTP31B. | Details |
| 52010285 | M12 connector, 90° angled, with 5 m cable适用于M12插头 带5m电缆 PVC材质，铜镀锡/ 镍锁紧螺母 | Details |
| 52006263 | Process connection | Socket for plug 4p-125V, 4A-M12M12 插头 自连接 M12转成格兰 | Details |
| 71114212 | M12 right-angle aviation connector, 90°自连接 可用于: M12插头 | Details |
| 71280307 | Hirschmann connector M16Consists of: plug connector, screw, seal, valve plug ring, adapter ring. Usage: FTI26, FTL31/FTL33, FTW33, PMC11, PMC21, PMP11, PMP21/PMP23. | Details |
| 71280349 | Hirschmann connector NPTF1/2Consists of: plug connector, screw, seal, valve plug ring, adapter ring. Usage: FTI26, FTL31/FTL33, FTW33, PMC11, PMC21, PMP11, PMP21/PMP23. | Details |
| 52022914 | Display module插接式显示模块 4-20mA, 4位红色数字显示, 霍斯曼接头DIN43650, 防护等级IP65, 压降 < 5V Cerabar T | Details |
| 52002643 | Stainless steel connector|Weld-in adapter G1/2, 316LFlush mount process connection PMP41 "1D" Material: 316L Correct installation only with dummy | Details |
| 52010172 | Weld-on socket, G1/2, protective plug required during welding, 3.1 material certificateFlush mount process connection PMP41 "1D" Material: 316L Inspection cert. EN10204-3.1 material Correct installation only with dummy | Details |
| 71389241 | Process connection | Weld-in G1/2, 316L, A DIN 3852Weld-in adapter for G1/2 A DIN 3852. Material: 316L. Usage: PMP11, PMP21, PMP43, PMP51, PMP71, PTP31B. | Details |
| 71389243 | Welding socket, G1/2, 3.1 material certificateWeld-in adapter for G1/2 A DIN 3852. Material: 316L. Inspection cert. EN10204-3.1 material. Usage: PMP21, PMP43, PMP51, PMP71. | Details |
| 52005082 | Weld boss protection plugto avoid any deformation during welding of welding nozzle 52002643 / 52010172. | Details |
| 71395803 | FTI26 Explosion-Proof SheathMaterial: PC. Mandatory for Ex-version. W/o Ex-protection cover the following Ex-protection is not guaranteed: FTI26: Dust Ex-protection. PMC21, PMP21: Ex ec approval. | Details |
Configurator / Comparison
Accessories / Spare parts
Source:Endress+Hauserpublic information from the website
Measuring principle video
Click to playManuals & Documents 10
All documents for this model10 documents · click to expand
BA Cerabar PMC11, PMC21, PMP11, PMP21, PMP23 Chinese
BA Cerabar PMP21 IO-Link Chinese
Cerabar PMC11, PMC21, PMP11, PMP21, PMP23 English
BA Cerabar PMP21 IO-Link English
TI 焊接接头、过程转接头和法兰 Chinese
TI Cerabar PMC11, PMC21, PMP11, PMP21 Chinese
TI Cerabar PMP21 IO-Link Chinese
TI Weld-in adapter, process adapter and flanges English
TI Cerabar PMC11, PMC21, PMP11, PMP21 English
TI Cerabar PMP21 IO-Link English
Case Studies
Municipal Wastewater Treatment · Gauge and Absolute Pressure — Application Case
Site Conditions
This is a Municipal Wastewater Treatment customer whose plant is at the inlet, biological and outlet stages of a municipal plant. The main task was measuring gauge or absolute pressure to judge process state.
The Problem
The difficulty lies in high solids and corrosive fractions, with large diurnal flow swings; at the same time effluent parameters drift and probes foul with sludge and biofilm. Specification therefore means selected by turndown, overpressure protection and diaphragm material.
What We Did
We took a pressure range approach — pressure solution matched to process pressure and temperature. Delivery was built around selected by turndown, overpressure protection and diaphragm material, with point-by-point checks on: stable compliance with Grade 1A discharge limits and online data reporting.
Operating Outcome
In service the system performs as intended — spotting abnormal pressure early, before equipment is damaged, with routine maintenance falling noticeably.
Food & Beverage · Gauge and Absolute Pressure — Application Case
Application Context
dosing, pasteurising, filling and CIP stages is a typical Food & Beverage duty. The project started from Gauge and Absolute Pressure, focusing on measuring gauge or absolute pressure to judge process state.
Process Constraints
frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, and syrups, dairy and beverages that scale easily, under strict hygienic requirements only amplify it. The Gauge and Absolute Pressure specification must therefore cover selected by turndown, overpressure protection and diaphragm material.
Delivery Approach
Delivery was handled as the pressure range — pressure solution matched to process pressure and temperature. Execution centred on selected by turndown, overpressure protection and diaphragm material, together with food-safety and hygienic design per 3-A / EHEDG.
Field Results
Operation shows the benefit clearly — spotting abnormal pressure early, before equipment is damaged, with confidence in this measuring point improving markedly.
Chemical & Pharmaceutical · Gauge and Absolute Pressure — Application Case
Customer Profile
The typical setting in Chemical & Pharmaceutical is reactors, metering vessels and finished-product tanks. The measuring point is Gauge and Absolute Pressure; the focus is measuring gauge or absolute pressure to judge process state.
Key Difficulties
Conditions are highly corrosive media with solvents and crystallisation, partly in explosive atmospheres and, on top of that, corrosion plus Ex protection shortens instrument life and makes downtime costly, which a standard configuration cannot handle for long. The design therefore starts with selected by turndown, overpressure protection and diaphragm material.
Implementation
The scope ran through the pressure range: pressure solution matched to process pressure and temperature. Technically it hinges on selected by turndown, overpressure protection and diaphragm material, and on these requirements: Ex certification and GMP traceability of records.
Customer Benefit
In practice this means spotting abnormal pressure early, before equipment is damaged, which cut the workload on the site maintenance team.
Power & Energy · Gauge and Absolute Pressure — Application Case
Project Background
The project covers boiler feedwater, turbine condensate and FGD/DeNOx systems. The work centres on Gauge and Absolute Pressure and the core task is measuring gauge or absolute pressure to judge process state.
Operating Challenges
The medium and duty are characterised by high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. So Gauge and Absolute Pressure cannot be specified generically — it calls for selected by turndown, overpressure protection and diaphragm material.
Solution
The Ainstru engineering team worked through the pressure range: pressure solution matched to process pressure and temperature. The configuration involves selected by turndown, overpressure protection and diaphragm material, with these requirements in view: compliance with power-industry codes and unit availability targets.
Results
Since start-up the system has run steadily; the practical result is spotting abnormal pressure early, before equipment is damaged.
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