CERTIFICATE(1)

EU-Type Examination(2)

Equipment or protective systems intended for use inpotentially explosive atmospheres - Directive
2014/34/EU(3)

EU-Type Examination Certificate Number: DEKRA 16ATEX0007 X(4)

Product:

Gas detector Model SDWL-1EC, SDWL-1DEC, SDWL-1OX,SDWL-1DOX, SDWL-1RI, SDWL-1DRI andRepeater Model RTWL-1(5)

Manufacturer:

RIKEN KEIKI Co., Ltd.

(6)

Address:

2-7-6, Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan(7)

This product and any acceptable variation thereto is specified in the schedule to this certificate and the documents
therein referred to.

(8)

DEKRA Certification B.V., Notified Body number 0344 in accordance with Article 17 of Directive 2014/34/EU of theEuropean Parliament and of the Council, dated 26 February 2014, certifies that this product has been found tocomply with the Essential Health and Safety Requirements relating to the design and construction of products
intended for use in potentially explosive atmospheres given in Annex II to the Directive.

Issue Number:2

The examination and test results are recorded in confidential test report number NL/DEK/ExTR16.0008/02.
(9)Compliance with the Essential Health and Safety Requirements has been assured by compliance with:EN IEC 60079-0 : 2018

EN 60079-11 : 2012

except in respect of those requirements listed at item 18 of the Schedule.
(10)

If the sign ”X” is placed after the certificate number, it indicates that the product is subject to the Specific Conditionsof Use specified in the schedule to this certificate.

(11)This EU-Type Examination Certificate relates only to the design and construction of the specified product. Furtherrequirements of the Directive apply to the manufacturing process and supply of this product. These are not coveredby this certificate.

(12)

The marking of the product shall include the following:

II 1 GEx ia IIC T4 Ga

Date of certification: 12 May 2020
DEKRA Certification B.V.

?
R. Schuller
Certification Manager©

Integral publication of this certificate and adjoining reports is allowed. This Certificate may only be reproduced
in its entirety and without any change.

DEKRA Certification B.V. Meander 1051, 6825 MJ Arnhem P.O. Box 5185, 6802 ED Arnhem The Netherlands
T +31 88 96 83000 F +31 88 96 83100 www.dekra-product-safety.com Registered Arnhem 09085396

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DescriptionIssue No. 2

The Gas detector Models SDWL-1EC, SDWL-1DEC, SDWL-1OX, SDWL-1DOX, SDWL-1RI andSDWL-1DRI are fixed-type gas monitors with wireless communication function designed toprovide continuous exposure monitoring of toxic gas, oxygen (O2) and flammable gas by diffusion
sampling method. The reading of gas detected or the status information of the equipment isindicated on the front LCD display, or sent to the high-order system by wireless communication.
The Repeater Model RTWL-1 is a fixed-type repeater with wireless communication function andno function of gas measurement. An optional antenna cable is available for the Gas detector orthe Repeater.
Ambient temperature: -20 °C to +60 °C
Additional information
The performance of the Gas detector Models SDWL-1EC, SDWL-1DEC, SDWL-1OX,SDWL-1DOX, SDWL-1RI and SDWL-1DRI, as safety devices, are not covered by this certificate.
Electrical data
Supply: Replaceable battery pack type RK9915, which includes two series-connected lithiumthionyl chloride batteries, model TL-5930 manufactured by TADIRAN.
Installation instructions
The instructions provided with the product shall be followed in detail to assure safe operation.
(16)

Report Number
No. NL/DEK/ExTR16.0008/02.

(17)

Specific conditions of use
Because a part of the antenna is made of plastic, if it is mounted in an area where the use of EPL
Ga equipment and group IIC is required, precautions have to be taken to avoid electrostatic
charge.
Because the enclosure is made of aluminium, if it is mounted in an area where the use of EPL Ga
equipment is required, it must be installed such, that, even in the event of rare incidents, ignition
sources due to impact and friction sparks are excluded.

(18)

Essential Health and Safety Requirements
Covered by the standards listed at item (9).

(19)

Test documentation
As listed in Report No. NL/DEK/ExTR16.0008/02.

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Form 227A
Version 2 (2019-06)

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Certificate history
Issue 0 Issue 1 -218850600
221761200

Issue 2 -224649000

Issue No. 2

initial certificate
addition of new modelsaddition of new sensor-bodyevaluation per EN IEC 60079-0: 2018

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Form 227A
Version 2 (2019-06)