| 1945 |
Company founded by Dr. Karl E. Slevogt |
| 1948 |
Renamed to Wissenschaftlich-Technische-Werkstätten (WTW) |
| 1954 |
Introduction of first WTW pH meter |
| 1965 |
Introduction of first WTW dissolved oxygen meter |
| 1976 |
Bavarian State Award for the Combibox compact multi-parameter system |
| 1982 |
Introduction of the world’s first zero-current-free (stable zero point) dissolved oxygen sensor for field measurements |
| 1983 |
Start of WTW’s online measuring technology program |
| 1986 |
First company to offer a 3-electrode dissolved oxygen sensor (TriOxmatic®) with automatic calibration on air (OxiCal®) |
| 1987 |
First company to offer a 4-electrode conductivity sensor (TetraCon®) for portable water analysis |
| 1993 |
First manufacturer of D.O., pH and conductivity measuring systems to be certified to ISO 9001 |
| 1995 |
• Introduction of the mercury-free OxiTop® system for manometric BOD determination • First company to offer monitors with built-in lightning protection |
| 1997 |
New photoLab®-laboratory photometers combine precision with outstanding ease of use |
| 1998 |
• I ntroduction of the PurCon® sample preparation system as a replacement for conventional filtration systems • First WTW spectrophotometer |
| 1999 |
The new laboratory instruments of the inoLab® family set new standards for the measurement of pH, D.O., conductivity, ISE and temperature |
| 2000 |
Introduction of TresCon® – the modular analytical system for the continuous measurement of ammonium, nitrite, nitrate, phosphate |
| 2001 |
• IQ SENSOR NET – the multi-parameter measuring system offers unlimited possibilities for online measurements • The new VisoTurb® and ViSolid® turbidity and solid sensors with their revolutionary ultrasonic keeping clean system give “low-maintenance” a completely new meaning |
| 2002 |
• AmmoLyt® 700 IQ enables reliable Online direct measurement of Ammonium • PurCon® IS: Sample Preparation – directly without pump |
| 2003 |
NitraLyt® 700 IQ is a perfect supplementary nutrient parameter (Nitrate) for Online direct measurement |
| 2004 |
• Multi-parameter portable meter Multi 3500i represents state-of-the-art technology in field applications • NitraVis®, CarboVis® and NiCaVis® – spectral “in-situ” Online sensors for Nitrate, Carbon and TSS measurement for wastewater control |
| 2005 |
• Portable photometers and turbidity meters for universal applications: pHotoFlex®/pHotoFlex® Turb Turb 430 IR • IQ SENSOR NET System 182 compact 2 channel transmitter |
| 2006 |
• VARiON® ammonium and nitrate multisensor with automatic compensation of interference ions |
| 2007 |
• The new optical D.O. sensor FDO® 700 IQ completes the WTW portfolio for online D.O. measuring • The new spectrophotometers of the photoLab® 6000 series combine systematic and spectral analysis with well proven quality assurance AQA. |
| 2008 |
The IQ SENSOR NET system keeps on developing: • New terminal/controller T 2020 XT with USB and dual-processor function • System 182 XT-4: perfect for up to 4 sensors • IQ-LabLink joins online measuring with laboratory calibration |
| 2009 |
The new ProfiLine single parameter portable meters feature extreme robustness and outstanding ease of use |
| 2010 |
MultiLine® IDS – new digital world of portable measurement: • MultiLine® – digital multi-parameter portable meters and • FDO® 925 – optical dissolved oxygen sensor for field and lab |