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.

gx-3r and gx-3r pro tools from rki2019 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
2018
MSHA GX-2009 available with NO2 Sensor


2017 Benzene Specific PID available for GX-6000
2017
Benzene Specific PID available for GX-6000


2015 Six gas sample draw with PID, IR, and super toxics, GX-6000 multi gas monitor
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
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
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
2010
Six gas portable monitor with PID capability, EAGLE 2


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


2005 RKI Instruments purchases a new building
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.
2003
Five sensor sample drawing personal monitor that measures % LEL and % volume methane, GX-2003.


man wearing glove holding and rki tool
2001
The worlds smallest 4 gas monitor, GX-2001.


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


2001 RKI developed the Beacon 100 and 800 controllers
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
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
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
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
1990
Riken introduces the first super toxic gas monitor, SC-90.


986 Riken presents world’s first 4 gas
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
1984
Riken offers a portable IR monitor for Freon detection, RI-413.


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


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


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


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


 first combination combustible and oxygen portable gas monitor with alarm, GX-31969  Riken builds the first combination combustible and oxygen portable gas monitor with alarm, GX-3.


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