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WTW : What instruments for analysing water quality?

A brand of Xylem Analytics, WTW is a leading name in water analysis for laboratories and plant operators. Its instruments cover the entire workflow: pH, redox (ORP), ions, conductivity, dissolved oxygen, turbidity, BOD, UV-Vis photometry. With its IDS (Intelligent Digital Sensors), WTW delivers traceability, accuracy and reliability, in compliance with ISO/DIN/EPA methods, for environmental monitoring, drinking and industrial water, aquaculture and quality control.

A German pioneer who set the standard in water measurement

Founded in 1945 in Weilheim (Bavaria, Germany), WTW – Wissenschaftlich-Technische Werkstätten – started out as a metrology workshop serving laboratories. Early on, the brand specialised in water electrochemistry and earned a reputation for the reliability of its benchtop and portable instruments. The introduction of now-iconic solutions – such as BOD measurement with OxiTop and photoLab spectrophotometers – marked key milestones. The digital era accelerated with IDS smart sensor technology, bringing on-sensor calibration and GLP traceability. By joining the Xylem group, WTW strengthened its international footprint while keeping its manufacturing base in Germany. The common thread: robust, accurate and durable instruments, engineered for the daily demands of laboratories and water operators.

Expertise and areas of specialisation

At the core of the WTW portfolio: electrochemistry and optics for water analysis.
- Core measurements in the lab and in the field: pH/ORP, ions, conductivity, dissolved oxygen. Digital IDS sensors store their own calibration, secure data integrity (GLP) and reduce connection errors. Portable and benchtop meters are built for precision and ruggedness (waterproof housings, field-ready ergonomics), with direct access to key ISO/DIN methods.
- Turbidity and photometry: turbidimeters to ISO 7027 (IR LED, nephelometry) cover major parameters (nutrients, metals, disinfectants) with built-in method programmes and quality assurance features.
- Biochemical oxygen demand: OxiTop systems automate BOD (dedicated reagents, time-course tracking), the reference solution for control laboratories.
WTW stands out for consistency from bench to field: the same smart sensors, the same protocols, the same data quality. Add strong application support, ISO/DIN/EPA-compliant methods and a design focused on sustainability (long sensor life, optimised maintenance). Result: reliable measurements that accelerate QC in food and beverage, chemical and cosmetic workflows, deliver robust insights in environmental R&D and support smoother operation of water networks.

WTW products supplied by Dutscher.

Frequently Asked Questions about the WTW brand

Where are WTW instruments designed and manufactured?
WTW designs and manufactures predominantly in Germany (Weilheim). The brand is part of Xylem Analytics and adheres to rigorous industry standards.

What is the WTW IDS technology?
These are digital sensors with onboard calibration and automatic identification. They enhance GLP traceability and reduce measurement errors.

Does WTW cover both laboratory and field?
Yes: benchtop instruments, waterproof portable meters.

Are WTW methods compliant with standards?
WTW instruments and methods are based on ISO/DIN/EPA frameworks (e.g. turbidity ISO 7027, BOD with OxiTop), delivering results accepted in audits.

What about CSR commitments?
Within Xylem, WTW is committed to sustainability (the Watermark programme, sustainable products, optical sensors that minimise consumables and waste).