Water purification & distribution

Map view Table view

Measuring point	Product	Alternatives
Maximum level detection of sodium hydroxide	Liquiphant FTL51B - digital, simple and safe	Vibronic Point level detection Liquiphant FTL31	Liquiphant FTL62 - the specialist for aggressive media
Sodium hydroxide addition	Proline Promag H 100 electromagnetic flowmeter	Proline Promass K 10 Coriolis flowmeter	Proline Promass F 100 Coriolis flowmeter
Maximum level detection of bisulfite	Liquiphant FTL51B - digital, simple and safe	Vibronic Point level detection Liquiphant FTL31	Liquiphant FTL62 - the specialist for aggressive media
Bisulfite addition	Proline Promass K 10 Coriolis flowmeter	Proline Promass E 100 Coriolis flowmeter	Proline Promass F 100 Coriolis flowmeter
Minimum level detection of bisulfit	Liquiphant FTL51B - digital, simple and safe	Vibronic Point level detection Liquiphant FTL31	Liquiphant FTL62 - the specialist for aggressive media
Chlorine addition	Proline Promass K 10 Coriolis flowmeter	Proline Promass E 100 Coriolis flowmeter	Proline Promass F 100 Coriolis flowmeter
Potable water inlet	Proline Promag W 400 electromagnetic flowmeter	Proline Promag W 10 electromagnetic flowmeter
Tap water oxidation-reduction potential	Digital ORP sensor Memosens CPS12E	Digital combined pH/ORP sensor Memosens CPS16E
Pre-filter pressure	Cerabar PMC51B - pressure transmitter	Cerabar PMP51B - pressure transmitter	Cerabar PMP43 – hygienic pressure transmitter
Inlet pressure for softener	Cerabar PMC51B - pressure transmitter	Cerabar PMP51B - pressure transmitter	Cerabar PMP43 – hygienic pressure transmitter
Permeate flow	Proline Promass F 100 Coriolis flowmeter	Proline Promass E 100 Coriolis flowmeter	Proline Promass F 300 Coriolis flowmeter
Water conductivity	Digital 4-electrode conductivity sensor Memosens CLS82E	Digital conductivity sensor Indumax CLS54D	Digital conductivity sensor Memosens CLS21E	Digital conductivity sensor Memosens CLS15E
Inlet RO oxidation-reduction potential	Digital ORP sensor Memosens CPS12E	Digital combined pH/ORP sensor Memosens CPS16E
Water pH	Digital pH sensor Memosens CPS11E	Digital pH sensor Memosens CPS31E	Digital pH sensor Memosens CPS41E
Inlet pressure reverse osmosis 1	Cerabar PMP43 – hygienic pressure transmitter	Cerabar PMC51B - pressure transmitter	Absolute and gauge pressure Cerabar PMP23
Inlet pressure reverse osmosis 2	Cerabar PMP43 – hygienic pressure transmitter	Cerabar PMC51B - pressure transmitter	Absolute and gauge pressure Cerabar PMP23
Outlet pressure reverse osmosis 2	Cerabar PMP43 – hygienic pressure transmitter	Cerabar PMC51B - pressure transmitter	Absolute and gauge pressure Cerabar PMP23
Minimum level detection of sodium hydroxide	Liquiphant FTL51B - digital, simple and safe	Vibronic Point level detection Liquiphant FTL31	Liquiphant FTL62 - the specialist for aggressive media
Minimum level detection of bisulfit	Liquiphant FTL51B - digital, simple and safe	Vibronic Point level detection Liquiphant FTL31	Liquiphant FTL62 - the specialist for aggressive media
Minimum level detection of chlorine	Liquiphant FTL51B - digital, simple and safe	Vibronic Point level detection Liquiphant FTL31	Liquiphant FTL62 - the specialist for aggressive media
MPD MeasuringPoint_Detail - A1-21 - Analyser	Low range water hardness analyzer Liquline System CA82HA

Level measurement in: Maximum level detection of sodium hydroxide

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Liquiphant FTL51B - digital, simple and safe

Point level switch for all liquid media

Alternatives:

Liquiphant FTL31 - Vibronic point level detection

Vibronic Point level detection Liquiphant FTL31

Point level switch for liquids in compact design with stainless steel housing

Liquiphant FTL62 - the specialist for aggressive media

A level switch for aggressive and pumpable liquids

General Requirements:

Cleanability, no dead legs, front flush mounting
No interaction with agitator operation

Technical requirements:

Measuring task: Point Level / Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Flow measurement in: Sodium hydroxide addition

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Picture of flowmeter Proline Promag H 100 / 5H1B (DN ≥ 40 / 1 1/2") for hygienic applications

Proline Promag H 100 electromagnetic flowmeter

The specialist for hygienic applications with an ultra-compact transmitter

Alternatives:

Picture of Coriolis flowmeter Proline Promass K 10 for multivariable measurement in utilities

Proline Promass K 10 Coriolis flowmeter

Flowmeter with minimized total cost of ownership with easy-to-use operation concept

Picture of Proline Promass F 100 / 8F1B with highest measurement performance for liquids and gases

Proline Promass F 100 Coriolis flowmeter

The flowmeter with premium accuracy, robustness and an ultra-compact transmitter

General Requirements:

Reliable and accurate measurement
Chemical resistant material

Technical requirements:

Measuring task: Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40 °C (104 °F)
Density: 0.8 to 1.25 g/cm³

Level measurement in: Maximum level detection of bisulfite

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Liquiphant FTL51B - digital, simple and safe

Point level switch for all liquid media

Alternatives:

Vibronic Point level detection Liquiphant FTL31

Point level switch for liquids in compact design with stainless steel housing

Liquiphant FTL62 - the specialist for aggressive media

A level switch for aggressive and pumpable liquids

General Requirements:

Cleanability, no dead legs, front flush mounting
No interaction with agitator operation

Technical requirements:

Measuring task: Point Level / Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Flow measurement in: Bisulfite addition

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Proline Promass K 10 Coriolis flowmeter

Flowmeter with minimized total cost of ownership with easy-to-use operation concept

Alternatives:

Picture of Coriolis flowmeter Proline Promass E 100 / 8E1C Cost-effective – multi-purpose device

Proline Promass E 100 Coriolis flowmeter

Mid-range Coriolis flowmeter with an ultra-compact transmitter

Proline Promass F 100 Coriolis flowmeter

The flowmeter with premium accuracy, robustness and an ultra-compact transmitter

General Requirements:

Reliable and accurate measurement
Flow measurement in a non-conductive media
Chemical resistant material

Technical requirements:

Measuring task: Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40 °C (104 °F)
Density: 0.8 to 1.25 g/cm³

Level measurement in: Minimum level detection of bisulfit

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Liquiphant FTL51B - digital, simple and safe

Point level switch for all liquid media

Alternatives:

Vibronic Point level detection Liquiphant FTL31

Point level switch for liquids in compact design with stainless steel housing

Liquiphant FTL62 - the specialist for aggressive media

A level switch for aggressive and pumpable liquids

General Requirements:

Cleanability, no dead legs, front flush mounting
No interaction with agitator operation

Technical requirements:

Measuring task: Point Level / Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Flow measurement in: Chlorine addition

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Proline Promass K 10 Coriolis flowmeter

Flowmeter with minimized total cost of ownership with easy-to-use operation concept

Alternatives:

Proline Promass E 100 Coriolis flowmeter

Mid-range Coriolis flowmeter with an ultra-compact transmitter

Proline Promass F 100 Coriolis flowmeter

The flowmeter with premium accuracy, robustness and an ultra-compact transmitter

General Requirements:

Reliable and accurate measurement
Flow measurement in a non-conductive media
Chemical resistant material

Technical requirements:

Measuring task: Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40 °C (104 °F)
Density: 0.8 to 1.25 g/cm³

Flow measurement in: Potable water inlet

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Picture of Electromagnetic flowmeter Proline Promag W 400 / 5W4C for the water & wastewater industry

Proline Promag W 400 electromagnetic flowmeter

Versatile standard flowmeter for the water and wastewater industry

Alternatives:

Picture of electromagnetic flowmeter Proline Promag W 10 for basic water and wastewater applications

Proline Promag W 10 electromagnetic flowmeter

Flowmeter for basic water and wastewater applications with easy-to-use operation concept

General Requirements:

Robust and reliable
Accurate and repeatable measurement
Easy accessibility for possible maintenance

Technical requirements:

Measuring task: Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40 °C (104 °F)
Density: 0.8 to 1.25 g/cm³

Analysis measurement in: Tap water oxidation-reduction potential

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Memosen CPS12E - Digital ORP sensor with platinum cap for processes with stable conditions

Digital ORP sensor Memosens CPS12E

Memosens 2.0 ORP electrode for standard applications in process and water & wastewater industries

Alternatives:

Memosens CPS16E - Digital combined pH/ORP sensor for standard applications

Digital combined pH/ORP sensor Memosens CPS16E

Memosens 2.0 glass electrode for standard applications in process and water & wastewater industries

General Requirements:

High accuracy
Long-term stability
Easy and accurate calibration

Technical requirements:

Measuring task: pH/ORP / Redox
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Pressure measurement in: Pre-filter pressure

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Cerabar PMC51B - pressure transmitter

Smart transmitter with ceramic membrane for highly accurate measurement of liquids and gases

Alternatives:

Cerabar PMP51B - pressure transmitter

Smart pressure transmitter with metal membrane for highly accurate measurement of liquids and gases

Cerabar PMP43 – hygienic pressure transmitter

Particularly compact, highly reliable and the perfect fit for demanding hygienic applications

General Requirements:

Front flush mounting for drainability
Fast temperature shock response
High linearity

Technical requirements:

Measuring task: Pressure
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Pressure measurement in: Inlet pressure for softener

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Cerabar PMC51B - pressure transmitter

Smart transmitter with ceramic membrane for highly accurate measurement of liquids and gases

Alternatives:

Cerabar PMP51B - pressure transmitter

Smart pressure transmitter with metal membrane for highly accurate measurement of liquids and gases

Cerabar PMP43 – hygienic pressure transmitter

Particularly compact, highly reliable and the perfect fit for demanding hygienic applications

General Requirements:

Front flush mounting for drainability
Fast temperature shock response
High linearity

Technical requirements:

Measuring task: Pressure
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Flow measurement in: Permeate flow

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Proline Promass F 100 Coriolis flowmeter

The flowmeter with premium accuracy, robustness and an ultra-compact transmitter

Alternatives:

Proline Promass E 100 Coriolis flowmeter

Mid-range Coriolis flowmeter with an ultra-compact transmitter

Coriolis flowmeter - Proline Promass F 300

Proline Promass F 300 Coriolis flowmeter

Flowmeter with premium accuracy, robustness and a compact, easily accessible transmitter

General Requirements:

Cleanability, no dead legs
Design according to ISPE "Water and Steam Systems"
High reproducibility over a large flow range
Low conductivity

Technical requirements:

Measuring task: Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40 °C (104 °F)
Density: 0.8 to 1.25 g/cm³

Analysis measurement in: Water conductivity

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Memosens CLS82E - Hygienic 4-electrode conductivity sensor for life sciences, food & beverage

Digital 4-electrode conductivity sensor Memosens CLS82E

Memosens 2.0 contacting conductivity sensor for hygienic applications in life sciences, food & bev

Alternatives:

Indumax CLS54D is an inductive conductivity probe for the highest hygienic and sterile demands.

Digital conductivity sensor Indumax CLS54D

Memosens toroidal conductivity sensor for hygienic and sterile applications

Memosens CLS21E - Robust conductivity sensor for medium conductivities

Digital conductivity sensor Memosens CLS21E

Memosens 2.0 contacting conductivity sensor for surface and drinking water monitoring

Memosens CLS15E - Digital contacting conductivity sensor for pure and ultrapure water

Digital conductivity sensor Memosens CLS15E

Memosens 2.0 contacting conductivity sensor for standard applications in pure and ultrapure water

General Requirements:

Mid-range conductivity

Technical requirements:

Measuring task: Conductivity
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Analysis measurement in: Inlet RO oxidation-reduction potential

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Digital ORP sensor Memosens CPS12E

Memosens 2.0 ORP electrode for standard applications in process and water & wastewater industries

Alternatives:

Digital combined pH/ORP sensor Memosens CPS16E

Memosens 2.0 glass electrode for standard applications in process and water & wastewater industries

General Requirements:

High accuracy
Long-term stability
Easy and accurate calibration

Technical requirements:

Measuring task: pH/ORP / Redox
Process pressure: 0 to 4 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Analysis measurement in: Water pH

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Memosens CPS11E - Digital pH sensor for standard applications with stable process conditions

Digital pH sensor Memosens CPS11E

Memosens 2.0 pH electrode for standard applications in process and water & wastewater industries

Alternatives:

Memosens CPS31E - Digital pH sensor for pH compensation in disinfection processes

Digital pH sensor Memosens CPS31E

Memosens 2.0 glass electrode for application in drinking water and swimming pools

Memosens CPS41E - digital pH sensor with liquid KCl electrolyte

Digital pH sensor Memosens CPS41E

Memosens 2.0 pH electrode for demanding applications in the chemical and process industries

General Requirements:

High accuracy
Long-term stability
Easy and accurate calibration

Technical requirements:

Measuring task: pH
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Pressure measurement in: Inlet pressure reverse osmosis 1

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Cerabar PMP43 – hygienic pressure transmitter

Particularly compact, highly reliable and the perfect fit for demanding hygienic applications

Alternatives:

Cerabar PMC51B - pressure transmitter

Smart transmitter with ceramic membrane for highly accurate measurement of liquids and gases

Absolute and gauge pressure Cerabar PMP23

Cost-effective pressure transducer with fully welded design for the food & beverage industry

General Requirements:

Front flush mounting for drainability
Fast temperature shock response
High linearity

Technical requirements:

Measuring task: Pressure
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Pressure measurement in: Inlet pressure reverse osmosis 2

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Cerabar PMP43 – hygienic pressure transmitter

Particularly compact, highly reliable and the perfect fit for demanding hygienic applications

Alternatives:

Cerabar PMC51B - pressure transmitter

Smart transmitter with ceramic membrane for highly accurate measurement of liquids and gases

Absolute and gauge pressure Cerabar PMP23

Cost-effective pressure transducer with fully welded design for the food & beverage industry

General Requirements:

Front flush mounting for drainability
Fast temperature shock response
High linearity

Technical requirements:

Measuring task: Pressure
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Pressure measurement in: Outlet pressure reverse osmosis 2

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Cerabar PMP43 – hygienic pressure transmitter

Particularly compact, highly reliable and the perfect fit for demanding hygienic applications

Alternatives:

Cerabar PMC51B - pressure transmitter

Smart transmitter with ceramic membrane for highly accurate measurement of liquids and gases

Absolute and gauge pressure Cerabar PMP23

Cost-effective pressure transducer with fully welded design for the food & beverage industry

General Requirements:

Front flush mounting for drainability
Fast temperature shock response
High linearity

Technical requirements:

Measuring task: Pressure
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Level measurement in: Minimum level detection of sodium hydroxide

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Liquiphant FTL51B - digital, simple and safe

Point level switch for all liquid media

Alternatives:

Vibronic Point level detection Liquiphant FTL31

Point level switch for liquids in compact design with stainless steel housing

Liquiphant FTL62 - the specialist for aggressive media

A level switch for aggressive and pumpable liquids

General Requirements:

Cleanability, no dead legs, front flush mounting
No interaction with agitator operation

Technical requirements:

Measuring task: Point Level / Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Level measurement in: Minimum level detection of bisulfit

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Liquiphant FTL51B - digital, simple and safe

Point level switch for all liquid media

Alternatives:

Vibronic Point level detection Liquiphant FTL31

Point level switch for liquids in compact design with stainless steel housing

Liquiphant FTL62 - the specialist for aggressive media

A level switch for aggressive and pumpable liquids

General Requirements:

Cleanability, no dead legs, front flush mounting
No interaction with agitator operation

Technical requirements:

Measuring task: Point Level / Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Level measurement in: Minimum level detection of chlorine

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

Liquiphant FTL51B - digital, simple and safe

Point level switch for all liquid media

Alternatives:

Vibronic Point level detection Liquiphant FTL31

Point level switch for liquids in compact design with stainless steel housing

Liquiphant FTL62 - the specialist for aggressive media

A level switch for aggressive and pumpable liquids

General Requirements:

Cleanability, no dead legs, front flush mounting
No interaction with agitator operation

Technical requirements:

Measuring task: Point Level / Liquids
Process pressure: 0 to 16 bar (0 to 232 psi)
Max. process temperature: 40°C (104°F)
Density: 0.8 to 1.25 g/cm³

Analysis measurement in: MPD MeasuringPoint_Detail - A1-21 - Analyser

Endress+Hauser offers a suite of analytical instruments ideal for this stage.

New

Low range water hardness analyzer Liquline System CA82HA

Colorimetric system for online monitoring of process water with low limit of detection

General Requirements:

Technical requirements:

Purified water (PW) or Water for Injection (WFI) production/storage loop

Water purification & distribution

Critical parameters under control - reliable water systems for pharma

Pharmaceutical water is one of the most critical products in drug manufacturing. To ensure consistent quality and supply, operations must meet stringent regulations and maintain full control over key process parameters. Endress+Hauser’s complete instrumentation portfolio enables real-time quality monitoring across all stages - from treatment and purification to distribution and point of use.

Comprehensive portfolio: Instruments for every scale and application—from small systems to large facilities
Regulatory compliance: Designed according to ASME BPE, ISPE, and Pharmacopeias
Digital integration made easy: Seamless connectivity via IO-Link, industrial Ethernet, and cloud platforms
Optimized performance: Data-driven calibration strategy for less downtime and greater reliability
Simplified operations: Standardized instrumentation for easier maintenance and reduced complexity

Check out our latest launches and innovations for your water processes

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

Pressure transmitter Cerabar PMP63B – product picture

Cerabar PMP63B – digital pressure transmitter

Precise measurement of hydrostatic level, absolute pressure and gauge pressure

Differential pressure transmitter Deltabar PMD63B – product picture

Deltabar PMD63B - differential pressure transmitter

Reliable measurement of hydrostatic level and differential pressure

Low range water hardness analyzer
Liquline System CA82HA

Colorimetric system for online monitoring of process water with low limit of detection

Cerabar PMP43 – hygienic pressure transmitter

Particularly compact, highly reliable and the perfect fit for demanding hygienic applications

Liquiphant FTL43 – hygienic point level switch for liquids

Proven in the field, particularly compact and perfectly suitable for hygienic applications

Liquiline Edge Module
CYY7

Connectivity device for the Liquiline platform for all industries

Liquiline CM42B two-wire transmitter for pH, ORP, conductivity or oxygen measurement

1-channel transmitter
Liquiline CM42B

Two-wire field device for hazardous and non-hazardous areas and hygienic applications in chemical, life sciences and food & beverage industries

Micropilot FMR43 – radar sensor for hygienic processes

High performance sensor, especially compact and the perfect fit for fast changing level applications

RTD IO-Link temperature head transmitter iTEMP TMT36 for head mount process temperature sensors

iTEMP TMT36 temperature transmitter

IO-Link temperature head transmitter with one RTD sensor input

iTEMP TMT31 temperature transmitter

4-20 mA temperature transmitter as head or DIN rail device with one RTD or one TC sensor input suitable for use in zone 2 (Ex ec) / Div. 2 areas

on-site flow calibration rig in a clean room of a biopharmaceutical facility

Services

ISO 17043‑proven calibration services

Highest level of measurement accuracy through Endress+Hauser’s on‑site calibration services, strengthened by accredited proficiency testing according to ISO 17043. This combination ensures objective proof of reliable and globally comparable calibration results beyond any other provider’s capabilities.

Guarantee consistent batch quality through accurate, stable measurement of critical formulation and filling parameters
Maximize production efficiency and process reliability with minimized measurement uncertainty and stable process control
Accelerate scale‑up and ensure reliable process consistency from laboratory to commercial manufacturing

Get more insights

FAQ

Frequent questions about the water purification process

What are the critical process parameters in purified water (PW) generation via RO/EDI/ion exchange?

Critical process parameters (CPPs) are the operating variables that directly affect the critical quality attributes (CQAs) of Purified Water, such as conductivity, TOC, microbial count, and overall chemical purity, which are the attributes ultimately demonstrating that the PW system remains in control.

Which measurements are needed to monitor purified water (PW) generation via RO/EDI/ion exchange?

For a GMP-compliant pharmaceutical PW system, the truly critical measurements are conductivity, TOC, flow, pressure (including ΔP), temperature, and EDI electrical parameters (current/voltage), because these directly affect or demonstrate compliance and system performance.

How is TOC monitoring per USP <643> managed in purified water (PW) generation via RO/EDI/ion exchange?

USP describes TOC and conductivity as complementary chemical control tests, with TOC addressing organic contamination and conductivity addressing ionic contamination. TOC is not a direct control parameter for RO, EDI, or ion exchange units. Rather, it is a critical quality attribute (CQA) used to verify that the overall PW generation and distribution system remains under chemical control. Organic contamination can originate from feed water, resin degradation, membrane materials, elastomers, biofilm, or distribution-system surfaces.

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Critical parameters under control - reliable water systems for pharma

Check out our latest launches and innovations for your water processes

ISO 17043‑proven calibration services

Frequent questions about the water purification process

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Water purification & distribution

Critical parameters under control - reliable water systems for pharma

Check out our latest launches and innovations for your water processes

ISO 17043‑proven calibration services

Frequent questions about the water purification process

Products & Services

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