Technical Data
ComparePressure
| Measuring Principle | Pressure switch |
| Characteristic | Intelligent pressure switch with capacitive sensor, long term stable and abrasion resistant |
| Supply voltage | 10...30 VDC |
| Reference Accuracy | 0.5 %, Platinum: 0.3 % |
| Long term stability | 0.2 % of URL/year |
| Process temperature | -25 °C....+100 °C (-13 °F....+212 °F) |
| Ambient temperature | -20 °C...+70 °C (-4 °C...+158 °F) |
| Measuring cell | +100 mbar....+40 bar (+1.5 psi....600 psi) |
| Max. overpressure limit | 60 bar (900 psi) |
| Process connection | Threads: G1/4, G1/2, MNPT1/4, MNPT1/2, DIN13, JIS R1/2 |
| Communication | 1x PNP switch 2x PNP switch 1x PNP switch + 4...20mA analogue |
| Design approvals | EN 10204-3.1 Final inspection report Cleaned from oil and grease Cleaned for oxygen applications Set min alarm |
| Specialities | Digital display |
The Ceraphant PTC31B is a cost-effective pressure switch with a ceramic diaphragm sensor. The sensor is vacuum-resistant and can safely measure and monitor absolute and gauge pressure. The pressure switch has a compact design and high stability, withstands high vacuum and can withstand an absolute vacuum down to 0 bar.
Advantages
Built-in electronic switch component enables decentralized and economical monitoring
Convenient function check and on-site information display via LED indicator and digital display
The capacitive, non-oil-filled ceramic diaphragm sensor (Ceraphire) has a minimum range of 0...20 mbar for stable process monitoring
High process availability, suitable for vacuum applications and measurement of abrasive media
Areas of application
Pressure switch with ceramic diaphragm sensor for absolute and gauge pressure monitoring in gases, steam, liquids and dust.
Process connection: thread
Process temperature: -25...+100°C (-13...+212°F)
Pressure: -1/0...+40 bar (-15/0...+600 psi)
Measurement accuracy: ±0.3%
Spare Parts & Accessories 5
5 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71336104 | Hirschmann connector M164-pole. Consists of: plug connector, srew, seal. Usage: PTC31B, PTP31B/PTP33B. | Details |
| 71336105 | Hirschmann connector NPTF1/24-pole. Consists of: plug connector, srew, seal. Usage: PTC31B, PTP31B/PTP33B. | Details |
| 71114212 | M12 right-angle aviation connector, 90°自连接 可用于: M12插头 | 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 |
Configurator / Comparison
Source:Endress+Hauserwebsite public information
Measuring principle video
Click to playManuals & Documents 8
All documents for this model8 documents · click to expand
BA Ceraphant PTC31B, PTP31B, PTP33B Chinese
BA Ceraphant PTC31B, PTP31B, PTP33B IO-Link Chinese
BA Ceraphant PTC31B, PTP31B, PTP33B English
BA Ceraphant PTC31B, PTP31B, PTP33B IO-Link English
TI 焊接接头、过程转接头和法兰 Chinese
TI Ceraphant PTC31B, PTP31B Chinese
TI Weld-in adapter, process adapter and flanges English
TI Ceraphant PTC31B, PTP31B 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.
