Technical Data
ComparepH
| Measuring Principle | Potentiometric |
| Application | Certified reference pH buffer solution with pH values of 4, 7 and 10 (feature 30/option C) Technical pH buffer solution with pH values of 2, 4, 7, 9, 9.2, 10 and 12 (feature 30/option D) |
| Characteristic | Certified reference pH buffer solution: Measurement uncertainty with metrological traceability at pH 4 and pH 7 = 0.03 pH units and at pH 10 = 0.08 pH units Technical pH buffer solution: Measurement uncertainty 0.02 pH units according to GUM. pH buffer greater than 10: Measurement uncertainty 0.05 pH units according to GUM (without metrological traceability) |
| Measuring range | Certified reference pH buffer solution: pH 4 pH 7 pH 10 Technical pH buffer solution: pH 2, pH 4, pH 7, pH 9, pH 9.2, pH10, pH12 |
| Design | The different buffer solutions are colored to avoid mixing of the buffers. pH 4.0 --> red pH 7.0 --> green pH 9.2 --> blue |
| Dimension | Available in different volume units: 5 L for use in the Liquiline Control CDC90 system 1000 ml / 250ml / 20x18 ml for single use. |
The high-quality CPY20 buffer solutions provide the highest-precision pH calibration. They are produced and bottled in calibration laboratories that are permanently accredited by the authoritative DAkkS (German accreditation body). The accuracy of the buffer solutions is +/-0.02 pH; they are prepared using NIST and PTB standards and contain only FDA-approved preservatives. With CPY20 you obtain reliable, accurate values.
Benefits
Highly accurate, reproducible buffer solutions help you optimize pH measured values in the process and increase product yield and quality
CPY20 pH buffer solutions are prepared in accordance with NIST (USA) and PTB (Germany) standards, are traceable and meet strict documentation requirements over their service life
All preservatives used are FDA-approved media, ensuring maximum product safety
The temperature curves of the CPY20 pH buffer solutions are preset in the Liquiline series transmitters for convenient sensor calibration and adjustment, reducing maintenance workload
Easily accessible buffer solution certificates simplify your audit trail and increase SOP reliability
Applications
CPY20 pH buffer solutions are used for calibration and adjustment of pH electrodes in all industries, suitable for the daily calibration of high-precision sensors in production processes and laboratories
Calibration and adjustment can be performed with:
Memobase Plus CYZ71D software
Liquiline series transmitters
Various conventional pH transmitters
For information on buffer solutions and bottle sizes, click “Features and specifications”.
Accessories/Spare parts
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Measurement principle video
Click to playSource: Endress+Hauserpublic information from the website
Configurator / Comparison
Manuals & Documents 2
All documents for this modelCase 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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