KITAGAWA GAS DETECTOR TUBE SYSTEM began in a small hydrogen sulfide detector tube for quality control, and have explored the field of GAS DETECTOR TUBE SYSTEM since then.

All through its history, we have put heavy efforts to research and development in order to achieve high quality, sensitivity, and accuracy. There are numerous characteristics to our method which cannot be seen in others, and our products are utilized in various fields.

We are certified under ISO9001.（Certificate ID JP97/10585QA）

The head office, and Aizu Komyo are certified under ISO9001.
The management system of KOMYO RIKAGAKU KOGYO K.K., head office, located in 1-8-28 Shimonoge, Takatsu-ku, Kawassaki-shi Japan, has been assessed and certified as meeting the requirement of ISO 9001:2000. Osaka branch, Fukuoka Sales Office, Kitakanto Sales Office and Aizu Komyo K.K. have been also assessed and certified as meeting the requirement of ISO 9001:2000.
The detailed scope is as below;
1） The development, design, manufacture, sales and in-house maintenance service of detector tubes and pumps, gas sampling tubes and air flow indicators
2） The development, design, manufacture, sales of gas sensors
3） The development, design, manufacture, sales and in-house maintenance service of standard products （Portable, Transportable and Fixed type） of gas measuring instruments, gas detectors and gas alarm apparatus
4） The development, design, manufacture, sales and in-house maintenance service of In-house maintenance of specially ordered products
5） Maintenance services of products

We are certified under ISO14001.（Certificate ID JP03/00350EM）

The head office and Aizu Komyo are certified under ISO14001.
The management system of KOMYO RIKAGAKU KOGYO K.K., head office located in 1-8-28 Shimonoge, Takatsu-ku, Kanagawa-ken Japan, has been assessed and certified as meeting the requirement of ISO 14001:2004.
The detailed scope is as below;
"The development, design, manufacture and in-house maintenance service of detector tubes and gas measuring instruments, gas detectors and gas alarm apparatus."