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Multi Gas Detector


Simply put, the GX-6000 is a game changer. This powerful hand-held instrument is capable of simultaneously monitoring up to 6 gases. In addition to the standard 4 confined space gases which include combustibles, O2, CO, & H2S, the GX-6000 has 2 additional smart channels that accept PID, IR or super toxic sensors.

Equipped with a strong internal sample pump, a man-down alarm, a panic alarm, an LED flashlight, and large auto rotating LCD display, the GX-6000 can operate as a single gas PID unit or a multifunctional tool utilizing all 6 channels. The GX-6000 with a PID sensor will come equipped with a library of over 600 VOC gases to choose from as standard. Choosing from the library is easy with a personalized favorites list of 30 commonly used VOC’s as well as a list of 8 of the most recently used VOC’s.

The GX-6000 has a rugged design built for the nastiest environments. It is equipped with a removable impact-resistant rubber boot and a dust and water resistant enclosure with an IP-67 rating. With 5 bright LED lights on 3 sides of the instrument, alarms are easily seen from a variety of perspectives. With vibration and loud audible alarm, GX-6000 will easily alert users when needed.

  • Features
  • Applications
  • Approvals
  • Gas Combination
  • Specification
  • Accessories
  • Multi gas Detection - 1 to 6 gases
  • Small & light - World smallest & lightest
  • Wide operation temp -20 to 50°C
  • Various approvals - ATEX IIECEx I CE
  • Smart sensor - PID, EC, IR, as
  • Interchangeable power source - Li-ion I Alkaline
  • High water .& dust proof level - IP67
  • Docking station - SDM-6000
  • New functions - Full dot LCD / Multi language / Man down / Panic alarm / LCD inversion / LED Flashlight
  • Personal Monitoring
  • Refineries / Petrochemical / Wastewater Treatment
  • Confined Space
  • Utilities
  • Chemical Plants
  • Hazardous Material
  • Water
  • Fire Services
  • Mining
  • Ex ia IIC T4 Ga (ATEX / IECEx)

Standard 4 Gas Sensor

No. Target Gas Sensor Code
1 CH4 or HC NC-6264AZP M or H or O
2 O2 OS-8M2 1 or 0
3 H2S ES-1827i 1 r 0
4 CO ES-1821 1 r 0

Smart Sensor

5, 6
7, 8
VOC (ppb) PIS-001 P1
VOC (ppm) PIS-002 P2
NH3 ESS-8332 E4
CL2 ESS-8335 E5
CO2 (5vol%) DES-3311-1 D1
HC (IR) DES-3311-2 D2
None - 00

Battery Type

No. Battery Type Model Code
9 Lithium-ion BUL-6000 L
Dry alkaline BUD-6000 D

"A" is a fixed code.
Choose a combination of 1-6 gases and battery type from the tables left.
1 to 4 : Standard 4 gas sensor (0 to 4 sensors) 5,6, 7,8 : Smart sensor' (0 to 2 sensors) 9 : Battery type
Ex.) When "M11 OP1E1 L" is indicated, the gases to be detected are "CH4 <%LEL>, O2, H2S, VOC (ppb). SO2", and the battery type is Lithium-ion.


Interference effects on indicated values are seen on some combination. For more details, please contact RIKEN KEIKI.

Gas To Be Detected Combustible gas
Hydrogen sulfide
Carbon monoxide
Detection Principle New ceramic Galvanic cell type Electrochemical type Electrochemical type Electrochemical type
Detection Range 0- 100%LEL 0-25.0% 0- 30.0 ppm 0- 150 ppm 0-400.0 ppm
Minimum Resolution 1%LEL 0.1 vol% 0.5 ppm 1 ppm 0.5 ppm
Alarm Setpoint 10%LEL (AL 1)
50%LEL (AL2)
19.5 vol% (AL 1)
23.5 vol% (AL2)
40.0 vol% (OVER)
5.0 ppm (AL 1)
30.0 ppm (AL2)
10.0 ppm (TWA)
15.0 ppm (STEL)
100.0 ppm (OVER)
25 ppm (AL 1)
50 ppm (AL2)
25 ppm(TWA)
200 ppm (STEL)
500.0 ppm (OVER)
25.0 ppm (AL 1)
50.0 ppm (AL2)
25.0 ppm (TWA)
35.0 ppm (STEL)
400.0 oorn (OVER)
Gas To Be Detected Volatile organic compound
Volatile organic compound
Sulfur dioxide
Nitrogen dioxide
DetectIon Principle Photoionization type Photoionization type Electrochemical type Electrochemical type Electrochemical type
DetectIon Range 50000 ppb 6000 ppm 0- 6.00 ppm 0- 9.00 ppm 0- 10.00 ppm
Minimum Resolution 1 ppb
(0 - 5000 ppb)
10 ppb
(5000 - 50000 ppb)
0.1 ppm
(0 - 600.0 ppm)
1 ppm
(600 - 6000 ppm)
0.05 ppm 0.05 ppm 0.05 ppm
Alarm Setpoint 5000 ppb (AL 1)
10000 ppb (AL2)
- (TWA)
- (STEL)
50000 ppb (OVER)
400.0 ppm (AL 1)
1000.0 ppm (AL2)
- (TWA)
- (STEL)
6000 ppm (OVER)
2.00 ppm (AL 1)
5.00 ppm (AL2)
2.00 ppm (TWA)
5.00 ppm (STEL)
6.00 ppm (OVER)
3.00 ppm (AL 1)
6.00 ppm (AL2)
3.00 ppm (TWA)
9.00 ppm (OVER)
0.50 ppm (AL 1)
1.00 ppm (AL2)
0.50 ppm (TWA)
1.00 ppm (OVER)
Gas to be detected Hydrogen cyanide
Carbon dioxide (CO2)
< vol% >
Combustible gas (HC)
<%LEL | Vol%>
Detection Principle Electrochemical type Non-dispersive infrared type Non-dispersive infrared type  
DetectIon Range 0- 15.0 ppm 0∼5.00vol% 0∼100%LEL /
(to 30.0 Vol%)
Minimum Resolution 0.1 ppm 0.02vol% 1%LEL / O.5vol%  
Alarm Setpoint 5.0 ppm (AL 1)
10.0 ppm (AL2)
4.7 ppm (STEL)
15.0 ppm (OVER)
0.50vol%(AL 1)
1O%LEU-(AL 1)

(*) Automatic %LEL and vol% range switching

Common specification

Concentration Display Digital LCD (full-dot display, 160 x 128 dots)
Detection Method Pump suction type
Flow Rate 0.45 L/min or more (Open flow rate)
Displays Clock display, battery level display, operating state display and'flow check display
Displays Language English, Japanese, German, Russian, Korean, Spanish, Italian, French, Portuguese
Buzzer Sound Volume 95 dB (A) or higher (30 cm)
Gas Alarm Display Lamp blinking, continuous modulating buzzer sounding, gas concentration and alarm detail disolav blinkina and vibration
Gas Alarm Pattern Self-latching
Fault Alarm/Self Diagnosis System abnormalities, sensor abnormalities, battery voltage drop, calibration failure, and low flow rate
Fault Alarm Display Lamp blinking, intermittent buzzer sounding, and detail display
Fault Alarm Pattern Self-latching
Panic Alarm Display Preliminary alarm : Lamp blinking, intermittent buzzer sounding
Main alarm : Lamo blinkina, continuous modulatina buzzer soundina
Panic Alarm Pattern Self-latching
Man-Ddown Alarm Display (*) Preliminary alarm : Lamp blinking, intermittent buzzer sounding
Main alarm : Lamp blinking, continuous modulating buzzer sounding
Man-Down Alarm Pattern (*) Non latching (auto-reset)
Transmission Specification IrDA (for data logger)
Power Supply Standard : Dedicated lithium ion battery unit [BUL-6000)
Option : Dedicated dry battery unit [BUD-60001
Continuous Operating Time BUL-6000 : About 14 hours (25°C, no alarm and no lighting)
BUD-6000 : About 8 hours (25°C, no alarm and no lighting)
Operating Temperatures -20 - +50°C
Operating Humidities Below 95% RH (Non-condensing)
Structure Drip-proof and dust-proof performances (compliant to IP67 level) (tubes excluded)
Explosion-Proof Structure Intrinsically safe explosion-proof structure
Explosion-Proof Class Ex ia IIC T4 Ga (ATEXIIECEx)
External Dimensions Approx. 70 (W) x 201 (H) x 54 (D) mm (projection portions excluded
Weight Approx. 500 g (When BUL-6000 is used)/Approx. 450 g (When BUD-6000 is used)

* Normally the man-down alarm function IS set to OFF and unavailable. To use this function, please contact RIKEN KEIKL

Standard Accessories
  • BUL-6000
    (Li-ion battery unit), Charger
  • Rubber Boot
  • Taper Nozzle
  • LCD Protect Film
  • Hand Strap
  • Belt Clip

CO2 removal filter for CO2 sensor
Charcoal filter for PID sensor

Optional Accessories
  • Gas Sampling Probe gas sampling hose (0.75m/5m/10m/20m/30m)
  • BUD-6000 (Alkaline battery unit) AA battery x 3
  • Data logger Program
  • PID list Setting Program
  • SDM-6000
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