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Our History - Gas Detectors - Portable Gas Monitors - Gas Sensors by RKI

Our 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.

October 26, 2005

RKI purchases a new building for the cooperate headquarters located at 33248 Central Ave, Union City California

October 26, 2003

Riken introduces the GX-2003, five-sensor sample drawing personal monitor, measures % LEL and % volume Methane.

October 26, 2001

Riken introduces the GX-2001, worlds smallest 4 gas monitor.

October 26, 2000

RKI develops and begins shipping the Diffusion Eagle. 550,000 portable and fixed gas monitors sold to date by Riken Keiki.

October 26, 1999

Riken introduces the GD-K77D smart transmitter with greatly simplified calibration and maintenance.

October 26, 1998

RKI develops the Beacon 100 and 800 controllers. The Eclipse, NIC stand alone transmitter is also introduced with unique optical controls.

October 26, 1997

Riken offers the GasWatch, the first wrist worn multi- gas monitor.

October 26, 1995

RKI and Riken together develop and introduce the first 6 gas portable monitor, the EAGLE.

October 26, 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

October 26, 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.

October 26, 1982

Riken presents the GX-86, world’s first 4 gas, belt worn portable monitor.

October 26, 1980

Riken offers the RI-413, portable IR unit for Freons

October 26, 1978

Riken introduces RI-411, portable IR unit for CO2.

October 26, 1971

Riken introduces the world’s first 3 gas, belt worn monitor, the GX-82.

October 26, 1969

Models OX-80, CO-80, and HS-80 become the first pocket size monitors from Riken.

October 26, 1959

Riken introduces the world’s first 3 gas monitor with alarm, model 1641.

October 26, 1939

Riken begins OEM sales to the USA with portable and fixed gas monitors.

October 26, 1927

Riken builds the first combination combustible and oxygen portable gas monitor with alarm model GX-3.

October 26, 1925

Riken develops combustible gas monitors based on catalytic sensors.