 Portable Gas Detectors |
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 Fixed Gas Detection Systems |
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 Product Literature Downloads Photoelectron Spectrometer |
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 RKI / Riken Keiki History
RKI is partnered with Riken Keiki Company, Ltd., the world leader in gas detection and sensor technologies. Celebrating over 65 years in the gas detection business, Riken has over 150,000 points of detection world wide in the semiconductor industry alone. RKI is the exclusive North American supplier of Riken products. |
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| 1925 |
Dr. Jiro Tsuji, founder of Riken Keiki, develops the Interferometer (world’s first combustible gas monitor) based on lightwave interference. |
| 1927 |
Dr. Oliver W. Johnson invented the first catalytic combustion gas sensor leading to the first combustible gas Indicator. |
| 1939 |
Riken Keiki Fine Instrument Co., Ltd. is established and the Interferometer gas monitor is in full production. |
| 1959 | Riken develops combustible gas monitors based on catalytic sensors. |
| 1969 | Riken builds the first combination combustible and oxygen portable gas monitor with alarm model GX-3. |
| 1971 | Riken begins OEM sales to the USA with portable and fixed gas monitors. |
| 1978 | Riken introduces the world’s first 3 gas monitor with alarm, model 1641. |
| 1980 | Models OX-80, CO-80, and HS-80 become the first pocket size monitors from Riken. |
| 1982 | Riken introduces the world’s first 3 gas, belt worn monitor, the GX-82. |
| 1983 | Riken introduces RI-411, portable IR unit for CO2. |
| 1984 | Riken offers the RI-413, portable IR unit for Freons. |
| 1986 | Riken presents the GX-86, world’s first 4 gas, belt worn portable monitor. |
| 1991 | Riken introduces the 4 gas monitor GX-91B. Also, the OX-62B single gas O2 with extender cable, and the SC-90 super toxic portable. |
| 1994 | In a joint venture, RKI Instruments, Inc. becomes Riken Keiki’s North American Partner. Also unveiled is the GX-94 four gas portable with datalogging and auto calibration. |
| 1995 | RKI and Riken together develop and introduce the first 6 gas portable monitor, the EAGLE. |
| 1997 | Riken offers the GasWatch, the first wrist worn multi- gas monitor. |
| 1998 | RKI develops the Beacon 100 and 800 controllers. The Eclipse, NIC stand alone transmitter is also introduced with unique optical controls. |
| 1999 | Riken introduces the GD-K77D smart transmitter with greatly simplified calibration and maintenance. |
| 2000 | RKI develops and begins shipping the Diffusion Eagle. 550,000 portable and fixed gas monitors sold to date by Riken Keiki. |
| 2001 | Riken introduces the GX-2001, worlds smallest 4 gas monitor. |
| 2003 | Riken introduces the GX-2003, five-sensor sample drawing personal monitor, measures % LEL and % volume Methane. |
| 2005 | RKI purchases a new building for the corporate headquarters located at 33248 Central Ave, Union City, California. |
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