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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.

2019 GX-3R, world’s smallest 4-gas monitor / GX-3R Pro smallest 5-gas monitor with bluetooth connectivity for phone app, RK Link



2018
MSHA GX-2009 available with NO2 Sensor



2017
Benzene Specific PID available for GX-6000



2015
Six gas sample draw with PID, IR, and super toxics, GX-6000 multi gas monitor



2016
Leak checker for 40+ Gases fumigants, toxics, freons, and combustibles, SP-220



2012
Five gas sample draw with 3 operating modes and auto-ranging display of % LEL and % volume, GX-2012 multi gas monitor



2010
Six gas portable monitor with PID capability, EAGLE 2



2009
The smallest confined space 4 gas monitor, GX-2009



2005
RKI Instruments purchases a new building for the corporate headquarters located at 33248 Central Ave, Union City California



2003
Five sensor sample drawing personal monitor that measures % LEL and % volume methane, GX-2003.



2001
The worlds smallest 4 gas monitor, GX-2001.



1999
Riken introduces the GD-K77D smart transmitter with greatly simplified calibration and maintenance.



2001
RKI developed the Beacon 100 and 800 controllers. The Eclipse, NIC stand alone transmitter is also introduced with unique optical controls.



1997
GasWatch, the first wrist worn multi-gas monitor for O2, CO, or H2S.



1995
RKI and Riken together develop and introduce the first 6 gas portable monitor, the EAGLE.



1994
RKI Instruments, Inc. becomes Riken Keiki’s North American partner with the introduction of is the GX-94, four gas, portable gas monitor with datalogging and auto calibration.



1990
Riken introduces the first super toxic gas monitor, SC-90.



1986
Riken presents world’s first 4 gas, belt worn portable monitor, GX-86.




1984
Riken offers a portable IR monitor for Freon detection, RI-413.



1983
Riken introduces portable IR unit for CO2 monitoring, RI-411.



1982
Riken introduces the world’s 3 gas, belt worn gas monitor, GX-82.



1980
First pocket sized monitors from Riken, Models OX-80, CO-80, and HS-80.



1978
Riken introduces the world’s first 3 gas monitor (LEL, O2, CO) with alarm, Model 1641.


1969  Riken builds the first combination combustible and oxygen portable gas monitor with alarm, GX-3.



1938 Riken develops first combustible gas monitors based on catalytic sensors, Interferometer.