IECEx Certificateof Conformity
INTERNATIONAL ELECTROTECHNICAL COMMISSION
IEC Certification System for Explosive Atmospheres
for rules and details of the IECEx Scheme visit www.iecex.com

Certificate No.:

IECEx DEK 21.0057X

Page 1 of 4

Status:Current

Issue No: 1

Date of Issue:

2024-04-26

Applicant:

RIKEN KEIKI Co., Ltd.
2-7-6, Azusawa, Itabashi-ku,
Tokyo, 174-8744,
Japan

Equipment:

Portable Gas Detector 9000 series, models GX-9000, GX-9000H, SC-9000

Optional accessory:
Type of Protection:

Ex ia, Ex daMarking:

Ex da ia IIC T4...T3 Ga
orEx ia IIC T4...T3 Ga

Approved for issue on behalf of the IECEx
Certification Body:

L.G. van Schie

Position:

Certification Manager

Signature:(for printed version)Date:(for printed version)

2024-04-26

1. This certificate and schedule may only be reproduced in full.
2. This certificate is not transferable and remains the property of the issuing body.
3. The Status and authenticity of this certificate may be verified by visiting www.iecex.com or use of this QR Code.

Certificate issued by:
DEKRA Certification B.V.
Meander 1051
6825 MJ Arnhem
Netherlands

Certificate history:
Issue 0 (2022-10-12)

IECEx Certificateof Conformity
Certificate No.:

IECEx DEK 21.0057X

Page 2 of 4

Date of issue:

2024-04-26

Issue No: 1

Manufacturer:

RIKEN KEIKI Co., Ltd.
2-7-6, Azusawa, Itabashi-ku,
Tokyo, 174-8744,
Japan

Manufacturinglocations:

RIKEN KEIKI NARA MFG. Co., Ltd.
49‐1, Abe, Sakurai‐shi,Nara, 633‐0054,
Japan

RIKEN KEIKI Co., Ltd.
2-3, Minamisakae-cho,
Kasukabe-shi,
Saitama, 344-0057,
Japan

This certificate is issued as verification that a sample(s), representative of production, was assessed and tested and found to comply with theIEC Standard list below and that the manufacturer's quality system, relating to the Ex products covered by this certificate, was assessed andfound to comply with the IECEx Quality system requirements.This certificate is granted subject to the conditions as set out in IECEx SchemeRules, IECEx 02 and Operational Documents as amended
STANDARDS :The equipment and any acceptable variations to it specified in the schedule of this certificate and the identified documents, was foundto comply with the following standards
IEC 60079-0:2017
Edition:7.0

Explosive atmospheres - Part 0: Equipment - General requirements

IEC 60079-1:2014
Edition:7.0

Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures "d"IEC 60079-11:2011
Edition:6.0

Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"This Certificate does not indicate compliance with safety and performance requirements
other than those expressly included in the Standards listed above.
TEST & ASSESSMENT REPORTS:
A sample(s) of the equipment listed has successfully met the examination and test requirements as recorded in:
Test Reports:
NL/DEK/ExTR21.0038/00

NL/DEK/ExTR21.0064/01

Quality Assessment Reports:
NL/DEK/QAR23.0010/00

NL/DEK/QAR23.0011/00

IECEx Certificateof Conformity
Certificate No.:

IECEx DEK 21.0057X

Page 3 of 4

Date of issue:

2024-04-26

Issue No: 1

EQUIPMENT:
Equipment and systems covered by this Certificate are as follows:
The Portable Gas Detector 9000 series is designed to provide continuous exposure monitoring of up to 6 mixture toxic gases and/or oxygenby suction type method.
It contains up to 3 R-sensors for the measurement of oxygen (O2), hydrogen sulphide (H2S) and carbon monoxide (CO) as well as maximumof 3 F-sensors out of 5 sensors for measuring of combustible gases, toxic gases, CO2 and VOC.
F-sensor will internally process concertation calculation and transmit digital data from gas concentration to the main CPU.
Gas sampling is done by the internal pump. Up to two pumps can be installed, sampling of two systems is possible.
The measurement results are displayed on the LCD while gas alarms can be issued via LED and buzzer.
The examination of the Portable Gas Detector does not include a judgment of the functional performance of the apparatus.
For more information see Annex 1.
SPECIFIC CONDITIONS OF USE: YES as shown below:
For ambient temperature range see thermal data in Annex 1.
Equipment must be prevented from impact to the buzzer opening at the enclosure.

IECEx Certificate
of Conformity
Certificate No.:

IECEx DEK 21.0057X

Page 4 of 4

Date of issue:

2024-04-26

Issue No: 1

DETAILS OF CERTIFICATE CHANGES (for issues 1 and above)
1. Minor changes on the label drawing.
2. Linked to new QARs.
3. Manufacturing location Ebina Denki is no longer listed.
4. Correction in Annex 1

Annex:
228482000-15-Annex1.pdf

Annex 1 to: Report No. NL/DEK/ExTR21.0064/01
IECEx DEK 21.0057X
Description
The Portable Gas Monitor 9000 series is designed to provide continuous exposure monitoring of up to 6
mixture toxic gases and/or oxygen by suction type method.
It contains up to 3 R-sensors for the measurement of oxygen (O2), hydrogen sulphide (H2S) and carbon
monoxide (CO) as well as maximum of 3 F-sensors out of 5 sensors for measuring of combustible gases,
toxic gases, CO2 and VOC.
F-sensor will internally process concertation calculation and transmit digital data from gas concentration tothe main CPU.
Gas sampling is done by the internal pump. Up to two pumps can be installed, sampling of two systems ispossible.
The measurement results are displayed on the LCD while gas alarms can be issued via LED and buzzer.
The examination of the Portable Gas Monitor does not include a judgment of the functional performance of
the apparatus.
Type designation
The type GX-9000 contains all sensor combinations.
The type GX-9000H is limited to combinations ofR-sensors for detection of O2 and low concentration of H2S,F-sensors ESF for detection of high concentration of H2S andF-sensors IRF.
The type SC-9000 is limited to multiple of ESF sensors.
Following sensor options are available:

R-sensorsName

ESR (3EC)

ESR (3EC)

ESR (3EC)
orESR (4EC)

Target Gas

O2

H2S

CO

Electro Chemical

Electro Chemical

Electro Chemical

Appearance
Detection
Principle

F-sensors
Name

NCF

TEF

ESF

IRF

PIF

Target Gas

Combustible

Combustible

Toxic

CO2 / CH4 / HC

VOC

Range%LEL

VOL%

ppm

ppm / vol%ppb / ppm

Catalytic

ThermalConductivity

ElectroChemical

NDIR

PID

Appearance

Detection
principle

Page 1 of 2Form 124
Version 4 (2019-10)

Annex 1 to: Report No. NL/DEK/ExTR21.0064/01
IECEx DEK 21.0057X
Marking variations and thermal data
The relation between type of battery, combustible gas thermo-catalytic sensor NC-6322, ambient
temperature range and marking symbols is given below:
Marking code

Ambient
temperature

Combustible gas
thermo-catalytic

Battery unit

Cell typeBUL-9000

NCR18650GA(Panasonic)

BUD-9000

LR6 (Toshiba)

BUD-9000

MN1500sensor NC-6322
Ex da ia IIC T4 Ga-40 °C to +60 °C

Ex ia IIC T4 Ga
Ex da ia IIC T4 Ga

No-40 °C to +60 °C

Ex ia IIC T4 Ga
Ex da ia IIC T4 Ga

Ex ia IIC T3 Ga

Yes
No-40 °C to +40 °C

Ex ia IIC T4 Ga
Ex da ia IIC T3 Ga

Yes

Yes
No

-40 °C to +60 °C(Duracell)

Yes
No

Electrical data
Supply:Battery unit type BUD-9000 with 6 Alkaline Manganese AA batteries (2 parallel lines of 3 in seriesconnected batteries), type LR6 manufactured by Toshiba or type MN1500 manufactured by Duracellorbattery unit type BUL-9000 with 3 lithium-ion rechargeable batteries (parallelly connected), type
NCR18650GA manufactured by Panasonic.
Main unit backup battery type CR1220 manufactured by Maxell.
ESF sensor backup battery type CR1632 manufactured by MuRata.

Page 2 of 2Form 124
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