Copyright© 2023 RIKEN KEIKI Co., Ltd. All Rights Reserved.

Major Products:   Combustible gas detection
          Oxygen deficiency / enrichment gas detection
          Toxic gas detection
          Multi-Gas detection equipment
          Gas Calorimeter
          Environmental Measurement Instruments,     
and more

Headquarter:               2-7-6 Azusawa, Itabashi-Ku, Tokyo 174-8744 Japan


Development &      2-3 Minamisakaecho, Kasukabe City,
Production:               Saitama 344-0057 Japan

Production:               RIKEN KEIKI NARA MFG. Co., Ltd.: 49-1 Abe, Sakurai City,
                                    Nara 633-0054 Japan

Comprehensive Gas Detector Manufacturer in Japan since 1939  |  SD-3 Special Web Site

Features & Traits     |     Sensor Technology     |     Detectable Gases     |     Contact Us

Packed with Features

model :  SD-3

RIKEN's most premium fixed gas detector ever

IECEx / ATEX / JPEx / FM / cFM
4-20mA / HART / MODBUS
CE / IEC(EN) / SIL2 / MED / IP66,7

<Explosion proof>
ATEX / IECEx, Japan Ex, FM, cFM
<Performance>
IEC/EN 60079-29-1, EN 45544-2, EN 50104
<Others>
CE(ATEX/EMC/RoHS), IP66/67, HART, SIL2, MED

<Compliant with Global Standards>

<Various Outputs>

4-20mA + HART
MODBUS (RS-485)
Alarm outputs (3 contacts)
・Alarm1
・Alarm2
・Fault alarm

<Usable in Harsh Environments>

<Chassis>
Stainless Steel SCS14 (equivalent to SS316)
<Performance>
-40 to 70 ℃(-40 to 158℉), IP66/67, Three-year warranty
<Options>
Splash guard, Weather cover, Filters, Lightning rod, etc. 

<Versatile Sensor Installation Methods>

<Diffusion>

<Suction>

<Remote>

<Direct Insertion>

<Dual Range Auto-switching >

No. Gas name Formula Full scale   No. Gas name Formula Full scale
1 Hydrogen H2 1 vol%   39 Freon 41 R-41 2000 ppm
2 Hydrogen H2 2 vol%   40 Freon 32 R-32 2000 ppm
3 Hydrogen H2 4 vol%   41 Freon 32 R-32 5000 ppm
4 Hydrogen H2 100 %LEL   42 Freon 32 R-32 20000 ppm
5 Hydrogen H2 500 ppm   43 Propylene C3H6 100 %LEL
6 Hydrogen H2 1000 ppm   44 Propylene C3H6 2000 ppm
7 Hydrogen H2 2000 ppm   45 Propane C3H8 100 vol%
8 Carbon dioxide CO2 2 vol%   46 Propane C3H8 100 %LEL
9 Carbon dioxide CO2 5 vol%   47 Butadiene C4H6 100 %LEL
10 Carbon dioxide CO2 10 vol%   48 Normal pentane n-C5H12 100 %LEL
11 Carbon dioxide CO2 2000 ppm   49 Normal hexane n-C6H14 200 ppm
12 Carbon dioxide CO2 5000 ppm   50 Normal hexane n-C6H14 2000 ppm
13 Carbon dioxide CO2 10000 ppm   51 N-propyl alcohol C3H8O 100 %LEL
14 Nitrogen dioxide NO2 15 ppm   52 Normal butane n-C4H10 100 %LEL
15 Carbon disulfide CS2 200 ppm   53 Normal octane C8H18 100 %LEL
16 Carbon monoxide CO 150 ppm   54 Normal octane C8H18 2000 ppm
17 Carbon monoxide CO 1000 ppm   55 Toluene C7H8 100 %LEL
18 Hydrogen sulfide H2S 5ppm   56 Tetrahydrofuran THF 100 %LEL
19 Hydrogen sulfide H2S 30 ppm   57 Cyclohexane C6H12 100 %LEL
20 Hydrogen sulfide H2S 100 ppm   58 Ethylene C2H4 100 %LEL
21 Carbonyl sulfide COS 2000 ppm   59 Ethylene C2H4 2000 ppm
22 Ethyl acetate EtAc 100 %LEL   60 Ethylbenzene EtBenz 100 %LEL
23 Deuterium / Heavy hydrogen D2 2000 ppm   61 Ethyl alcohol C2H5OH 10 vol%
24 Oxygen O2 25 vol%   62 Ethyl alcohol C2H5OH 100 %LEL
25 Ethylene oxide EO 100 ppm   63 Ethane C2H6 100 %LEL
26 Vinyl chloride VCM 100 %LEL   64 Isopropyl alcohol IPA 100 %LEL
27 Hydrogen chloride HCL 15ppm   65 Isopropyl alcohol IPA 2000 ppm
28 Chlorine CL2 1.5ppm   66 Isobutylene i-C4H8 100 vol%
29 Methyl ethyl ketone MEK 100 %LEL   67 Isobutylene i-C4H8 100 %LEL
30 Methyl isobutyl ketone MIBK 100 %LEL   68 Isobutane i-C4H10 100 vol%
31 Methyl alcohol CH3OH 100 %LEL   69 Isobutane i-C4H10 100 %LEL
32 Methane CH4 2 vol%   70 Isobutane i-C4H10 2000 ppm
33 Methane CH4 100 vol%   71 Ammonia NH3 75 ppm
34 Methane CH4 100 %LEL   72 Acetone C3H6O 100 %LEL
35 Methane CH4 5000 ppm   73 Acetylene C2H2 100 %LEL
36 Methane CH4 20000 ppm   74 Acetylene C2H2 2000 ppm
37 Benzene C6H6 100 %LEL   75 N,N-dimethylacetamide DMAC 4000 ppm
38 Hexafluoro-1,3-butadiene C4F6 2000 ppm   76 2,3,3,3-tetrafluoropropene CH2C2F4 20000 ppm
          77 1,2-dichloroethylene C2H2CL2 600 ppm
The application for certain certificates is currently pending. Please feel free to contact us for more information.

Any other gases will be ready to ship. Please feel free to contact us for more information.

Comprehensive Gas Detector Manufacturer in Japan since 1939.

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