Technical Data
ComparepH
| Measuring Principle | |
| Application | Hygienic and sterile applications, food industry, pharmaceutical industry, biotechnology |
| Characteristic | Sterilizable and autoclavable ISFET sensor for the pH measurement Analog or digital sensors with Memosens technology |
| Measuring range | pH 0 to 14 |
| Measuring principle | Ceramic diaphragm, double chamber reference, double gel |
| Design | All shaft lengths with temperature sensor Advanced gel technology |
| Material | PEEK, Ceramics und EPDM |
| Dimension | Diameter: 12 mm (0.47 inch) Shaft lengths: 120, 225, 360 and 425 mm (4.72, 8.86, 14.2 and 16.7 inch) |
| Process temperature | –15 to 135 °C (5 to 275 °F) |
| Process pressure | Max. 10 bar at 100 °C (Max. 145 psi at 212 °F) |
| Temperature sensor | Pt1000 |
| Ex certification | ATEX, FM, CSA |
| Connection | Contactless, inductive, digital connection head with Memosens technology |
| Ingress protection | IP68 |
Field of application
Ceragel CPS71D is the digital specialist for demanding processes and hygienic applications. Its contamination-resistant gel guarantees stable measurement even in flowing media or low conductivity. The sensor measures reliably at high temperatures and is non-toxic assuring highest safety. Ceragel CPS71D is not the latest Memosens generation. To get information on the new Memosens sensors with extended functionality, click CPS71E for chemical applications and CPS61E for hygienic applications.
Process technology and monitoring of processes with:
- Quickly changing pH values
- High proportion of electrode poisons such as H2S
Chemical industry
Hygienic and sterile applications:
- Fermenters
- Biotechnology
- Life sciences
With ATEX, FM, and CSA approval for application in hazardous areas
Benefits
Sensor resists strong acids and bases and high organic loads
Suitable for CIP/SIP and autoclaving maintaining high accuracy
Free from animal-based materials and from acrylamide
Maximum process safety through non-contact inductive signal transmission
Enables predictive maintenance due to storage of sensor and process-specific data
Reduced operating costs thanks to minimized process downtime and extended sensor lifetime
pH：
| Measuring Principle | Potentiometric | |
| Application | Aggressive chemical and hygienic applications, process | |
| Characteristic | Analog, digital pH single-rod measuring cells For chemical process, hygienic and sterile applications with an ion trap for poison-resistant reference |
|
| Measuring range | pH 0 to 14 | |
| Measuring principle | Ceramic diaphragm, ion-trap | |
| Design | All shaft lengths with temperature sensor Advanced gel technology Digital electrode with Memosens technology |
|
| Material | Glass and ceramic | |
| Dimension | Diameter: 12 mm (0.47 inch) Shaft lengths: 120, 225, 360 and 425 mm (4.72, 8.86, 14.2 and 16.7 inch) |
|
| Process temperature | 0 to 140 °C (32 to 284 °F) | |
| Process pressure | 1 to 14 bar (15 to 203 psi) | |
| Temperature sensor | NTC 30k | |
| Ex certification | ATEX, FM, CSA | |
| Connection | Inductive, digital connection head with Memosens technology | |
| Ingress protection | IP68 | |
| Additional certifications | 3A, biocompatibility | |
Measuring principle video
Click to playConfigurator / Comparison
Manuals & Documents 5
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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