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

Features & Traits

<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 >

Improved Sensing Technology

Detectable Gas List

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