Oxygen Monitor with pump

  • Riken Keiki GX-8000 Combustible Monitor 0-100% LEL with internal pump. Riken Keiki GX-8000 Combustible Monitor 0-100% LEL with internal pump.
GX-8000-O2 at a glance

< 1/1 >

To request further information about this product please fill in your details below, we will respond to you via email or telephone. Please make sure that you have read and agree with our Privacy Policy before submitting your enquiry.

Riken Keiki GX-8000 harsh environment Oxygen Monitor

The  GX-8000 Single gas Oxygen monitor sets a new industry standard for rugged, reliable, portable gas detection.

This robust, lightweight, sample drawing multi-gas monitor is designed to provide continuous and simultaneous monitoring of Oxygen.  It measures  oxygen(O2) with a range of 0-40% volume.

The GX-8000-O2 is available with Alarms or No Alarms as well as having the option of Alkaline or Lithium Ion batteries.

It has a rugged IP-67 waterproof design making it well suited to harsh as well as tough environments. The GX-8000 is suitable for many industries including pharmaceutical, utilities, waste water treatment, telecommunications as well as marine shipping.

The compact, lightweight design makes it comfortable to carry using the shoulder/neck strap. It has an optional waist strap allows for hands free use. The instrument is easy to operate single-handed in addition a powerful 750ml / minute built-in pump will draw a sample from 30m within a few seconds. The GX-8000-O2 has ATEX Exia II CT4 approval for use in Hazardous areas as well as having a datalogging function.GX-8000 Features Diagram


Riken’s Gx-8000 usability as well as its reliability are the culmination of 75 years of experience as a leading gas detector  manufacturer. The GX-800o is certified to international standards (ATEX / IECEx / MED (wheel mark), etc).

GX-8000 Harsh Environment Multi-Gas Monitor

OX-03 Personal Oxygen Monitor

SD-1OX Fixed Explosion proof Oxygen detector

RX-8500 Series

  • Real-time,  detection of Oxygen 0-40% Volume
  • Large display with auto back lighting
  • Strong sample drawing capability (0.75L/min)
  • Loud 95dB alarm buzzer
  • 3 bright LED alarm windows
  • Intrinsically Safe ATEX Exia II CT4 approved
  • IP67 water and dust resistant
  • Lithium-ion rechargeable battery
  • Compact, light weight, ergonomic design
  • Optional waist strap for hands free operation
  • Data logging as standard
  • Pharmaceutical
  • Utilities
  • Waste water treatment
  • Telecommunications
  • Marine shipping
Target gas Combustibles
(CH4, i-C4H1O, H2, others)
Hydrogen Sulfide
Carbon Monoxide
Detection principle Thermal Conductivity Catalytic Combustion Galvanic cell Electro-chemical Electro-chemical
Detection range
0-100 vol%
0-100 LEL%
Gas alarm N/A 1st : 10%LEL
2nd: 50%LEL
1st : 19.5%
2nd: 23.5%
1st : 10.0ppm
2nd: 30.0ppm
TWA: 10.0ppm
STEL: 15.0ppm
1st : 25ppm
2nd: 50ppm
TWA: 25ppm
STEL: 200ppm
Types of alarm Gas alarm : Latching, 2 alarms
Failure alarm: Flow failure, Sensor failure, Battery failure, Circuit failure, Calibration failure
Display of alarm LED: -Flashing LED’s
Buzzer:: -Buzzer sounds alternates between a low and high pitch
Visual display: -Indication value flashes. Alarm message displays and flashes.
Alarm sound More than 95dB (A) at 30cm
Display Digital LCD with auto backlight
Digital display (7 segments) and digital bar graph (25 segments)
(50 segments with single gas versions GX-8000 Type LEL & Type O2)
Sampling method Sample Draw, Minimum 0.75L/min
Power source Lithium-ion battery as standard (fully charged in 3 hours)
Optional 3pcs AA alkaline battery pack also available
(Alkaline battery pack standard with single gas versions:
GX-8000 Type O2 / GX-8000 Type LEL
-Lithium-ion battery optional)
Continuous operation Lithium-ion battery: more than 12 hours (GX-8000 Type O2, more than 20 hours)
AA alkaline battery pack: more than 6 hours (GX-8000 Type O2, more than 12 hours)
Operating temp & humidity -20~+50°C, -4-+122°F below 95%&RH (Non-condensing)
Dimensions & Weight Approx. 154(W) x 81(H) x 127(D) mm, Approx. 1.1kg with Lithium ion battery (Alkaline battery 0.9kg)
Approx. 6.1″(W) x 3.1″(H) x 4.9″(D), Approx. 2.4lb with Lithium ion battery (Alkaline battery 2.0lb)
Ingress proof rating IP67
Explosion proof Intrinsically safe Exia II CT4
Approvals IECEx, ATEX, MED (Wheel Mark), CE, TIIS, HK
Additional features Activity indicator (pilot indicator and pump driving indicator), Pump stop function, Bump test function,
IrDA communication, Data logger, Password protection
(GX-8000 single gas versions Type LEL & Type O2
with confidence beep and LED flash (once every minute)
(CH4, i-C4H10,
H2, etc)*
0-40% VOL
Hydrogen Sulfide
Carbon Monoxide
The new GX-8000 consolidates and improves the old classic models; including…
(catalytic sensor)
(TC sensor)
Type A GX-111
Type B GX-111
Type C GX-7, GX-85N
(with gas tube)
Type D GX-7, GX-85N
(with gas tube)
Type E NP-237H
Type F GX-7, GX-85N
Type LEL GP-226
Type O2 OX-226, OX-415, OX-1, OX-62B

• Please specify gas combinations when ordering.

* Combustible gases:
Standard: Hydrocarbons (HC) Iso-butane i-C4H10 / Methane CH4 / Hydrogen (H2) (specify when ordering)
Optional: Toluene, n-Hexane, Methyl alcohol, Acetylene, MEK (factory set).