About DKK-TOA
Why Are We Different?
Our Specialization
Globalization
For Our Future
Portable Water Quality MeterP-40 Series
Optical Dissolved Oxygen ProbeMM4-DDO
Desktop Water Quality Meter X Series
Ambient Air Monitoring System
Message from the President
DKK-TOA Corporate Video
Company Brochure
Environment / CSR Report(in Japanese)
News Release
Announcement
21/12/2020
We are closed during Dec. 29 - Jan. 4.