Technical Data
ComparepH
| Measuring Principle | Potentiometric |
| Application | Measurements in drinking water, wastewater and process water |
| Characteristic | Digital Memosens 2.0 pH sensor for laboratory measurements and random sampling in the field Robust pH sensor with plastic shaft |
| Measuring range | pH 0 to 14 (1 to 12 application range) |
| Material | Glass and polymer |
| Dimension | Diameter: 12 mm (0.47 inch) Shaft length: 120 mm (4.72 inch) |
| Process temperature | -5 to 80 °C (23 to 176 °F) |
| Process pressure | 1 bar, not intended for continues measurment in process |
| Temperature sensor | NTC 30kΩ |
| Connection | Inductive, digital Connection head with Memosens technology |
| Ingress protection | IP68 |
The Memosens CPL51E is rugged and durable, with a plastic electrode shaft, protected glass membrane and no metal lead, allowing direct water sample analysis in the field or in the laboratory. The precalibrated electrode is plug and play. It is recommended for use with the Liquiline Mobile CML18 mobile handheld device, without any further settings.
Benefits
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Inductive Memosens sensor connection is unaffected by moisture and corrosion.
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Measuring point checks can be performed in the laboratory or on site. The physically protected glass membrane works safely in water and wastewater conditions.
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Built-in temperature sensor with automatic temperature compensation.
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Fast response, even in cold water with poor ionic activity.
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Reference system with open junction minimizes the risk of clogging.
Application areas
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Memosens CPL51E is suitable for drinking water, wastewater and process water applications:
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Online checking of measuring loops
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Analysis of water samples (on site or in the laboratory)
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Offline pH measurement
Spare Parts & Accessories 3
3 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71538217 | CPSxx electrode protection cap20 pc protective caps for pH sensors CPSxx | 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
Source: public information from the Endress+Hauser website
Manuals & Documents 4
All documents for this modelCase Studies
Municipal Wastewater Treatment · EH-Lab — Application Case
Project Background
The project covers the inlet, biological and outlet stages of a municipal plant. The work centres on EH-Lab and the core task is water and process analysis with E+H laboratory instruments.
Operating Challenges
The medium and duty are characterised by high solids and corrosive fractions, with large diurnal flow swings, and effluent parameters drift and probes foul with sludge and biofilm. So EH-Lab cannot be specified generically — it calls for configured by parameter set, range and calibration practice.
Solution
The Ainstru engineering team worked through the laboratory line: configuring around lab method standards and sample throughput. The configuration involves configured by parameter set, range and calibration practice, with these requirements in view: stable compliance with Grade 1A discharge limits and online data reporting.
Results
Since start-up the system has run steadily; the practical result is consistent with online instruments, making cross-checks easy.
Food & Beverage · EH-Lab — Application Case
Project Overview
The site is dosing, pasteurising, filling and CIP stages. The customer wanted EH-Lab properly configured on the existing plant, with the aim of water and process analysis with E+H laboratory instruments.
Technical Challenges
What actually causes trouble is syrups, dairy and beverages that scale easily, under strict hygienic requirements, and frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. All of this means the EH-Lab configuration has to involve configured by parameter set, range and calibration practice.
Configuration
Supply and installation were organised through the laboratory line: configuring around lab method standards and sample throughput. On site this meant configured by parameter set, range and calibration practice, checked line by line against: food-safety and hygienic design per 3-A / EHEDG.
Performance
After commissioning the outcome is consistent with online instruments, making cross-checks easy, and the readings are now used for process tuning.
Chemical & Pharmaceutical · EH-Lab — Application Case
Site Conditions
This is a Chemical & Pharmaceutical customer whose plant is at reactors, metering vessels and finished-product tanks. The main task was water and process analysis with E+H laboratory instruments.
The Problem
The difficulty lies in highly corrosive media with solvents and crystallisation, partly in explosive atmospheres; at the same time corrosion plus Ex protection shortens instrument life and makes downtime costly. Specification therefore means configured by parameter set, range and calibration practice.
What We Did
We took a laboratory line approach — configuring around lab method standards and sample throughput. Delivery was built around configured by parameter set, range and calibration practice, with point-by-point checks on: Ex certification and GMP traceability of records.
Operating Outcome
In service the system performs as intended — consistent with online instruments, making cross-checks easy, with routine maintenance falling noticeably.
Power & Energy · EH-Lab — Application Case
Application Context
boiler feedwater, turbine condensate and FGD/DeNOx systems is a typical Power & Energy duty. The project started from EH-Lab, focusing on water and process analysis with E+H laboratory instruments.
Process Constraints
drift under high temperature and pressure, with very costly unplanned outages, and high temperature and pressure with both steam and saline water only amplify it. The EH-Lab specification must therefore cover configured by parameter set, range and calibration practice.
Delivery Approach
Delivery was handled as the laboratory line — configuring around lab method standards and sample throughput. Execution centred on configured by parameter set, range and calibration practice, together with compliance with power-industry codes and unit availability targets.
Field Results
Operation shows the benefit clearly — consistent with online instruments, making cross-checks easy, with confidence in this measuring point improving markedly.
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