Technical Data
ComparepH
| Measuring Principle | |
| Application | Flotation, leaching, neutralization, outlet monitoring |
| Characteristic | Resistent against electrolyte poisoning and dirt repellent gel-electrode including process connection NPT 3/4" |
| Measuring range | pH 0 to 14 |
| Measuring principle | Gel-compact electrode with double chamber reference system, kalium nitrate bridge electrolyte and PTFE-diaphragm |
| Design | Compact electrode in PPS housing with NPT 3/4" process connection |
| Material | Housing: PPS pH electrode: lead-free membrane glass Double chamber reference system: KNO3 and KCl/AgCl |
| Dimension | Diameter: 22 mm (0.87 inch) Length (protcetion guard, long shaft): 150 mm (5.91 inch) Length (flat membrane): 140 mm (5.51 inch) |
| Process temperature | Version LH: 0 to 110 °C (32 to 230 °F) Version NN: 0 to 80 °C (32 to 170 °F) |
| Process pressure | 1 to 10 bar abs at 80 °C (15 to 145 psi at 176 °F) |
| Temperature sensor | NTC 30K |
| Ex certification | (optional) FM IS NI Cl. I Div.1&2, Groups A-D |
| Connection | Memosens plug |
| Ingress protection | IP68 |
The Orbipac CPF81D is a digital electrode and a simple solution for measurements under harsh operating conditions. It provides reliable, high-precision measurement even in fibrous media and at high flow rates. The integrated assembly saves space and time when installing the electrode in flow or immersion installations. Using Memosens digital technology, the CPF81D offers maximum process and data integrity and is easy to operate. The electrode is corrosion-resistant and moisture-proof and can be calibrated in the laboratory and used for preventive maintenance.
Advantages
Suitable for flow and immersion installations
Long-term stability: a second electrolyte bridge provides better protection against electrode poisoning, e.g. by S2- or CN- ions
Robust polymer housing protects against mechanical damage
Flat diaphragm suitable for measurement in high-flow and fibrous media
Non-contact inductive signal transmission ensures maximum process safety
Stores sensor characteristic data for convenient preventive maintenance
Reduces process downtime, extends electrode service life and lowers operating costs
Application areas
The Orbipac CPF81D is a rugged pH electrode for measurements in mining processes and water & wastewater treatment processes. It monitors:
Flotation
Leaching
Neutralization
Inlet and outlet
Spare Parts & Accessories 3
3 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71038228 | *** sensorfor assignment of sensors to measuring loop. 100 sensor clips with printable labels | Details |
| CPY4- | KCl electrolyte CPY4For liquid filled electrodes | Enquire |
| CPY20- | pH buffer solution CPY20pH quality buffer solution, referenced to primary reference material of PTB and standard reference material of NIST. With calibration certificate buffer solution | Enquire |
Configurator / Comparison
Accessories / Spare parts
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Measuring principle video
Click to playSource:Endress+Hauserpublic information from the website
Manuals & Documents 7
All documents for this model7 documents · click to expand
BA CPSx1, CPFx1 pH电极 CPSx2, CPFx2 ORP电极 Chinese
BA CPSx1, CPFx1 pH sensors CPSx2, CPFx2 ORP sensors English
pH-/Redoxsensoren und Referenzhalbzellen pH/ORP sensors and reference half cells Operating Instructions English
Orbipac CPF81D, CPF82D, CPF81, CPF82 Chinese
技术资料 Orbipac CPF81/CPF82, CPF81D/CPF82D Chinese
Orbipac CPF81D/CPF82D and CPF81/CPF82 English
Technical Information Orbipac CPF81/CPF82 and CPF81D/CPF82D English
Case Studies
Municipal Wastewater Treatment · PH — Application Case
Application Context
the inlet, biological and outlet stages of a municipal plant is a typical Municipal Wastewater Treatment duty. The project started from PH, focusing on continuous pH monitoring for neutralisation and compliance control.
Process Constraints
effluent parameters drift and probes foul with sludge and biofilm, and high solids and corrosive fractions, with large diurnal flow swings only amplify it. The PH specification must therefore cover choosing glass or ISFET sensors by temperature, fluoride content and pressure.
Delivery Approach
Delivery was handled as the analyser range — selecting as part of a complete water-analysis system. Execution centred on choosing glass or ISFET sensors by temperature, fluoride content and pressure, together with stable compliance with Grade 1A discharge limits and online data reporting.
Field Results
Operation shows the benefit clearly — tighter dosing control and lower reagent consumption, with confidence in this measuring point improving markedly.
Food & Beverage · PH — Application Case
Customer Profile
The typical setting in Food & Beverage is dosing, pasteurising, filling and CIP stages. The measuring point is PH; the focus is continuous pH monitoring for neutralisation and compliance control.
Key Difficulties
Conditions are syrups, dairy and beverages that scale easily, under strict hygienic requirements and, on top of that, frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, which a standard configuration cannot handle for long. The design therefore starts with choosing glass or ISFET sensors by temperature, fluoride content and pressure.
Implementation
The scope ran through the analyser range: selecting as part of a complete water-analysis system. Technically it hinges on choosing glass or ISFET sensors by temperature, fluoride content and pressure, and on these requirements: food-safety and hygienic design per 3-A / EHEDG.
Customer Benefit
In practice this means tighter dosing control and lower reagent consumption, which cut the workload on the site maintenance team.
Chemical & Pharmaceutical · PH — Application Case
Project Background
The project covers reactors, metering vessels and finished-product tanks. The work centres on PH and the core task is continuous pH monitoring for neutralisation and compliance control.
Operating Challenges
The medium and duty are characterised by highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. So PH cannot be specified generically — it calls for choosing glass or ISFET sensors by temperature, fluoride content and pressure.
Solution
The Ainstru engineering team worked through the analyser range: selecting as part of a complete water-analysis system. The configuration involves choosing glass or ISFET sensors by temperature, fluoride content and pressure, with these requirements in view: Ex certification and GMP traceability of records.
Results
Since start-up the system has run steadily; the practical result is tighter dosing control and lower reagent consumption.
Power & Energy · PH — Application Case
Project Overview
The site is boiler feedwater, turbine condensate and FGD/DeNOx systems. The customer wanted PH properly configured on the existing plant, with the aim of continuous pH monitoring for neutralisation and compliance control.
Technical Challenges
What actually causes trouble is high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. All of this means the PH configuration has to involve choosing glass or ISFET sensors by temperature, fluoride content and pressure.
Configuration
Supply and installation were organised through the analyser range: selecting as part of a complete water-analysis system. On site this meant choosing glass or ISFET sensors by temperature, fluoride content and pressure, checked line by line against: compliance with power-industry codes and unit availability targets.
Performance
After commissioning the outcome is tighter dosing control and lower reagent consumption, and the readings are now used for process tuning.
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