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 24.0016X

Page 1 of 3

Status:Current

Issue No: 0

Date of Issue:

2024-04-15

Applicant:

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

Equipment:

Portable gas detector, type GX-Force

Optional accessory:
Type of Protection:

Ex d, Ex i

Marking:

Ex da ia IIC T4 Ga, (with catalytic gas sensor)
Ex ia IIC T4 Ga, (without catalytic gas sensor)

Approved for issue on behalf of the IECEx
Certification Body:

R. Schuller

Position:

Certification Manager

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

2024-04-15

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:

IECEx Certificateof Conformity
Certificate No.:

IECEx DEK 24.0016X

Page 2 of 3

Date of issue:

2024-04-15

Issue No: 0Manufacturer:

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

Manufacturinglocations:

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

RIKEN KEIKI NARA MFG. Co., Ltd.
49‐1, Abe, Sakurai‐shi,Nara, 633‐0054,
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 Report:
NL/DEK/ExTR24.0019/00
Quality Assessment Reports:
NL/DEK/QAR23.0010/00

NL/DEK/QAR23.0011/00

IECEx Certificate
of Conformity
Certificate No.:

IECEx DEK 24.0016X

Page 3 of 3

Date of issue:

2024-04-15

Issue No: 0

EQUIPMENT:
Equipment and systems covered by this Certificate are as follows:
GX-Force is an “Ex ia” portable suction type gas detector which can measure 4 gases. For gas sensors, electrochemical type and catalytic
type are used. The electrochemical type sensor detects CO (carbon monoxide), H2S (hydrogen sulfide), and O2 (oxygen). The catalytic typesensor detects flammable gases.
Rechargeable temperature range is between +10 °C and +40 °C.
Ambient temperature range is between -20 °C and +60 °C.
Type designation:
GX-Force
Three different gas sensors are used:
Model ESR-A1DP: measures CO/H2S (electrochemical principle)
Model ESR-X13P: measures O2 (electrochemical principle)
Model NCR-6309: measures flammables (catalytic)
Electrical data
Non-user-replaceable Battery powered.
Nominal voltage: 3.6 V
Maximum open circuit voltage: 4.2 V
Charging circuit:
Charging shall be done in a non-hazardous location by use of a charger exclusively specified for it.
Um = 6.0 V (SELV circuit).

SPECIFIC CONDITIONS OF USE: YES as shown below:
1. The flameproof joints are not intended to be repaired.
2. When using the product in hazardous areas, take the precautions as listed in safety instructions to safeguard against static electricity
hazards.