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RKI / Riken Keiki History

Riken KeikiRKI 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.

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.

History Presentation
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