DSE-2005-2

Gas Detectors with Signal Converters
Model:

SD-3 Series

Features● Next generation high performance sensor "F Sensor Series" is installed, greatly
improving both functions and performance.
• Three-year sensor warranty *Specific sensors excluded. Inspection at least once a year is a requirement.
• Operating temperature range: -40 - +70 °C *Specific sensors excluded• Sensor degradation and life assessment function• IEC/EN, ANSI/ISA, and CSA performance compatibility planned● Complies with different global standards (including planned certifications).

• Explosion-proof certifications in different countries (ATEX/IECEx, Japan Ex (Japan), FM/cFM),
CE marking, SIL 2 (IEC 61508), etc.

● Wide range of output options• Supports Modbus (RS-485) communication in addition to 4 - 20 mA output + HART communication.
• Three relays (ALARM1, ALARM2, FAULT) can be mounted• Allows up to three relays (ARM1, ALARM2, FAULT) to be mounted.

● Rugged housing construction allows use even in harsh environments.

• Housing material: Stainless steel SCS14 (SUS316 equivalent), protection rating equivalent to IP66/67,
compatible with wide temperature range (-40 - +70 °C)• Extensive range of optional accessories: Protective cover, splash guard, lightning arrester (except Japan
Ex), filters, etc.

● Wide range of types to suit a variety of uses and installation environments• Diffusion type, suction type (pour into by external unit), remote type, duct insertion type

RIKEN KEIKI Co., Ltd

DSE-2005-2

The SD-3 Series are fixed explosion-proof gas detectors that
continuously monitor for combustible gases, toxic gases, andoxygen in the surrounding atmosphere. These gas detectors
detect gas leaks and activate an alarm when preset
concentrations are exceeded. Detected gas concentrations areconverted and output as 4 - 20 mA analog and digital HART
signals. Output options include Modbus (RS-485)
communication and the use of three relays.

The rugged housing construction (material: stainless steel,protection rating equivalent to IP66/67) allows use in a wide
temperature range (-40 - +70 °C). A range of different mounting
types (e.g., wall, pole, and duct mounted) support a variety ofuses and installation environments.
These global products are certified explosion-proof in various
countries and meet the requirements of various international
standards, including IEC/EN performance and SIL 2 certification.
<Connector 3> unused<Connector 2><Connector 4>• Power supply/signal cable• Lightning arrester (TP-48)*• Power supply/signal cable
Lightning arrester (TP-48)**Requires adapter.

*Requires adapter.

<Connector 1><Connector 5>• Contact output cable• RS-485 interface
cable• HART modem connector(Cannot be used in explosionproof areas)

7-segment LED and 3-color
lamps (Red/Green/Yellow)<Remote type>

Displays gas concentration,
status, and command selection
menu.

<Connector 6><Connector 6>• Sensor connector• Remote sensor head connector cable

New improved fixed-type sensors!
Incorporates the newly developed “F Sensor” sensor series. The “F Sensor” series products are high-performance sensors withdramatically improved sensor performance. The sensors are covered by a three-year warranty for peace of mind.

<Features>• Three-year sensor
warranty*• Operating temperature
range of -40 - +70 °C*• Sensor degradation and life
assessment function• IEC/EN performancecompatibility planned

IRF
Non-dispersive
infrared typeNCF
New ceramic type

SGF
Semiconductor type

SHF
Hot-wiresemiconductor type

ESF
Electrochemical type*Specific sensors excluded

RIKEN KEIKI Co., Ltd

DSE-2005-2

Detection principles and detection target gases by model
The SD-3 Series consists of the following models, which vary by sampling method and detection principle.
Please select the appropriate model for the intended use.

<List of detection target gases by model>
Model

Sampling
method

SD-3RI

Diffusion typeSD-3DRI

Suction type

SD-3NC

Diffusion typeSD-3DNC

Suction typeSD-3GH

Diffusion typeSD-3DGH

Suction typeSD-3GHS

Diffusion typeSD-3DGHS

Suction type

SD-3SP

Diffusion typeSD-3DSP

Suction type

SD-3EC

Diffusion typeSD-3DEC

Suction type

SD-3ECS

Diffusion typeSD-3DECS

Suction type

SD-3ECB

Diffusion typeSD-3DECB

Suction type

Detection principle

Certification
plate

Detection target gas
Combustible
gas

Toxic gas〇

IRF: Infrared typeRed〇

NCF: New ceramic
type

Red

〇

Yellow〇

SGF: Semiconductor
type

ESF: Electrochemical
type

Blue

〇

Remarks〇〇

Yellow
SHF: Hot-wiresemiconductor type

OxygenCS2 (carbon disulfide) only〇
Toxic gas: Yellow
certification plate
Oxygen: Silver certification
plate

Yellow/silver〇Yellow〇

H2S (hydrogen sulfide) only

Yellow〇

With EC barrier*〇*Differs depending on detection target gas. See the F-sensor list for details.

<List of detection target gases by model (remote type)>
Model(Main unit)
Main unit model(Remote sensor
unit)

SD-3SC

Sampling
methodDetection principle

Certification
plate

Detection target gas
Combustible
gas

Toxic gas〇

GD-3RI

IRF: Infrared typeRed〇

GD-3NCNCF: New ceramic typeRed〇

Yellow〇

GD-3GH

SGF: Semiconductor
type

GD-3GHS
GD-3SP

Diffusion
type

SHF: Hot-wiresemiconductor type

GD-3ECGD-3ECS
GD-3ECB

ESF: Electrochemical
type〇

Remarks〇〇

YellowBlue

OxygenCS2 (carbon disulfide) only〇
Toxic gas: Yellow
certification plate
Oxygen: Silver certification
plate

Yellow/silver〇Yellow〇

H2S (hydrogen sulfide) only

Yellow〇

With EC barrier*〇*Differs depending on detection target gas. See the F-sensor list for details.

RIKEN KEIKI Co., Ltd

DSE-2005-2

Wide range of types to suit a variety of uses and installation
environments!

The SD-3 Series detectors can be used with a remote sensor which can be installed in a location up to
20 m from the main detector unit. An optional splash guard and dedicated kit (sold separately) can beused to allow insertion inside ducts. Using a suction type model in conjunction with an external pumpallows use in limited installation space and high places where maintenance work is not possible.
[Diffusion type] [Suction type]

NC[Remote type][Duct insertion type]

Calibration gas
inlet
Splash guard(Sensor part)

With double range! Allows high-accuracy measurements over a wide
concentration range from low concentrations (ppm) to the lower
explosive limit (LEL)! *HART communication not available

SD-3NC and SD-3DNC models with the NCF (new ceramic type) sensor support double range. The double
range feature allows the scale to be switched between Low range (low concentration side) and High range(high concentration side) depending on gas concentration levels. For example, if the detection target gas
is methane, the display range automatically switches between Low range for 0 - 2,000 ppm and Highrange for 5 - 100 %LEL. Using two different calibration gases for the Low and High ranges allows highaccuracy measurements.
<High range: 5 - 100 %LEL><Low range: 0 - 2,000 ppm>.

Auto range switching

Any of the following three can be selected for the 4 - 20 mA analog output:[Double range + 4-16][Double range + L4-20]

External output[Double range + H4-20]

External output

20.5 mA

22 mA

20 mA

20 mA

Detection mode

External output

Maintenance mode

20.5 mA
20 mA

16 mA
Switching point mA
Full scale over

4 mA

4 mA
2.5 mA

2.5 mA
L rangeZerosuppression

H range
Full scaleGas
concentration
Full scale over4 mA
2.5 mA
L rangeZerosuppression

Full scaleGas
concentration
H range

L rangeZerosuppression

H range
Full scaleGas
concentration

RIKEN KEIKI Co., Ltd

DSE-2005-2

Wide range of output options
The SD-3 Series detectors allow Modbus (RS-485) communication or contact output to be added forexternal output, in addition to 4 - 20 mA signal output + HART communication. This support for a wide
variety of communication types enables flexible integration with existing systems.
The optional contact output can also output gas alarms (ALARM1/ALARM2) and fault alarms (FAULT),
allowing you to organize a local gas detection system by combining with external devices such as alarm
lamps and buzzers.
[Option] Alarm contact outputs• Gas alarm output: ALARM 1• Gas alarm output: ALARM 2• Fault alarm output: FAULT

4 - 20 mA signal+
HART communication[Option] Modbus (RS-485) communication[Terminal specifications: 4 - 20 mA signal + HART communication]<Using 3-core cable>
Terminal
No.

Power supply/signal cable connection

1

Power source (+)

2

Common (Power source (-), signal (-))

3

Signal (+)

Power supply/signal
terminal plate(The numbers are
terminal numbers.)<Using 4-core cable>
Terminal
No.

Power supply/signal cable connection

1

Power source (+)

2Power source (-)

3

Signal (+)

4

Signal (-)[Terminal specifications: Contact output (option)]
Terminal
No.

Contact output
terminal plate(Relay 1)

Cable connection

1

N.O.

2

Common3

N.C.

(Relay 2)

N.O.: Normal Open
N.C.: Normal Close(Relay 3)*Relays 1 : ALARM1
Relays 2 : ALARM2
Relays 3 : FAULT

RIKEN KEIKI Co., Ltd

DSE-2005-2

Specifications[SD-3 Series]
Model

Diffusion typeSD-3RI

SD-3NC

SD-3GH

SD-3GHS

Suction typeSD-3DRI
Non-dispersive
infrared typeSD-3DNC
Catalytic type(New ceramic type)SD-3DGH

SD-3DGHS

Detection principle
Detection gas

SD-3SP

SD-3EC

SD-3DSP
SD-3DEC
Hot-wire
Semiconductor typesemiconductor typeCombustible gas/toxic gas/oxygen; detection range depends on detection target gas.

Display

SD-3ECS

SD-3ECB

SD-3DECS

SD-3DECB

Electrochemical type7-segment LED (5-digit) and 3-color lamps (red / green / yellow)

Sampling method

Diffusion type/suction type (pour into by external unit)

Setting flow rate

0.4 – 1.5 L/min

Gas alarm typeTwo-step alarm (H-HH or H-L or L-LL)

Fault alarm/self-diagnosis
Warnings
Gas
Standard
Concentration
OptionSignalAlarm contact (option)

System abnormality (E-9)/sensor abnormality (E-1)
Sensor life assessment/clock abnormality diagnosis/communication diagnosis/sensor warning
Gas concentration output (4 - 20 mA + HART), 4 - 20 mA DC (non-insulated, linear output), load resistance 600 Ω or less, maximum resolution 250 divisions (depending on specifications)RS-485 (half-duplex)
SPDT (2 alarms, 1 fault output operation), 250 V 2 A AC, 30 V 1 A DC (resistance load), minimum load 5 V 0.1 A DC

Power supply

24 V DC (18 - 30 V DC)

Power consumption

Maximum 3.8 W

Maximum 4.5 W

Maximum 4.5 W

Maximum 4.5 W

Maximum 3.5 W

Maximum 2.8 W

Maximum 2.8 W-40 - +70 °C (no sudden changes), 0 - 95 %RH or less (no condensation), or according to sensor specifications if restrictions apply
Stainless steel SCS14 (SUS316 equivalent)Degrees of protection
External
Diffusion type
dimensions(excluding
Suction typeprojections)Diffusion type
WeightSuction type

Equivalent to IP66/67
Approximately 171 (W) × 322 (H)× 127 (D) mm
Approximately 171 (W) × 334 (H)× 127 (D) mm
Approximately 7.3 kg

Approximately 171 (W) × 277 (H) × 127 (D) mm
Approximately 171 (W) × 289 (H) × 127 (D) mm
Approximately 6.7 kg
Approximately 7.0 kg

Type of protection

Approximately 7.6 kg
Flameproof construction+ intrinsically safe explosion-proof
construction

Flameproof construction
ATEX

Explosion-proof
approvals

IECEx

Maximum 3.1 W

M25 × 1.5, option: NPT3/4, NPT1/2, M20 × 1.5 (using adapter)

Cable connectors
Operating temperature/ humidity
range
Housing material

II 2G Ex db IIC
T6/T5 Gb
IEx db IIC
T6/T5 Gb

II 2G Ex db IIC
T5/T4 Gb
Ex db IIC
T5/T4 Gb

II 2G Ex db IIC
T5/T4 Gb
Ex db IIC
T5/T4 Gb

CE marking

II 2G Ex db IIC
II 2G Ex db IIC
II 2G Ex db IIC
T6/T4 Gb
T5/T4 Gb
T5/T4 Gb
Ex db IIC
Ex db IIC
Ex db IIC
T6/T4 Gb
T5/T4 Gb
T5/T4 Gb
ATEX directive, EMC directive, RoHS directive

HART communication

II 2G Ex db IIC
T5/T4 Gb
Ex db IIC
T5/T4 Gb

II 2G Ex db ia IIC T4 Gb
Ex db ia IIC T4 Gb

HART7[Remote type: SD-3SC + GD-3 Series]
Model

Main unit
Remote sensor unit

Detection principle

SD-3SCGD-3RI
Non-dispersive
infrared type

GD-3NC
Catalytic type(New ceramic type)

Detection target gas

GD-3GH

GD-3GHS

GD-3SP
GD-3EC
Hot-wiresemiconductor typeCombustible gas/toxic gas/oxygen; detection range depends on detection target gas.

GD-3ECS

Semiconductor type

Display

7-segment LED (5-digit) and 3-color lamps (red / green / yellow)

Sampling method

Diffusion typeGas alarm typeTwo-step alarm (H-HH or H-L or L-LL)

Fault alarm/self-diagnosis

System abnormality (E-9)/sensor abnormality (E-1)

Warnings
Gas
Standard
Concentration
OptionSignalAlarm contact (option)

Sensor life assessment/clock abnormality diagnosis/communication diagnosis/sensor warning
Gas concentration output (4 - 20 mA + HART), 4 - 20 mA DC (non-insulated, linear output), load resistance 600 Ω or less, maximum resolution 250 divisions (depending on specifications)RS-485 (half-duplex)
SPDT (2 alarms, 1 fault output operation), 250 V 2 A AC, 30 V 1 A DC (resistance load), minimum load 5 V 0.1 A DC
Shielded twisted pair cable 1.25sq (1.38 mm2/AWG16), maximum 20 m between main unit (SD-3SC) and remote sensor unit (GD-3)

Remote cable
Power supplyPower
consumption

24 V DC (18 - 30 V DC)
Main unit
Remote sensor unit

Maximum 5.0 W
Maximum 1.2 W

Maximum 2.0 W

Maximum 2.0 W

Maximum 1.0 W

Maximum 1.0 W

Maximum 1.0 W

Maximum 1.0 W-40 - +70 °C (no sudden changes), 0 - 95 %RH or less (no condensation), or according to sensor specifications if restrictions apply

Operating temperature/humidity range
Housing material

Stainless steel SCS14 (SUS316 equivalent)Degrees of protection
External
Main unit
dimensions(excluding
Remote sensor unit
projections)
Main unit
WeightEquivalent to IP66/67
Approx. 171 (W) × 193 (H) × 127 (D) mm

Approximately 6.0 kg
Approximately 3.0 kg

Main unit

IECEx

CE marking
HART communication

Approximately 4.0 kg

Flameproof enclosure
Flameproof construction

Remote sensor unit

ATEX

Approximately 125 (W) × 240 (H)× 88 (D) mm

Approximately 125 (W) × 195 (H) × 88 (D) mm

Remote sensor unit

Explosion-proof
approvals

Maximum 2.0 W

M25 × 1.5, option: NPT3/4, NPT1/2, M20 × 1.5 (using adapter)

Cable connectors

Type ofprotection

GD-3ECBElectrochemical type

II 2G Ex db IIC
T6/T5 Gb
Ex db IIC
T6/T5 Gb

II 2G Ex db IIC
T5/T4 Gb
Ex db IIC
T5/T4 Gb

II 2G Ex db IIC
T5/T4 Gb
Ex db IIC
T5/T4 Gb

II 2G Ex db IIC
II 2G Ex db IIC
II 2G Ex db IIC
T6/T4 Gb
T5/T4 Gb
T5/T4 Gb
Ex db IIC
Ex db IIC
Ex db IIC
T6/T4 Gb
T5/T4 Gb
T5/T4 Gb
ATEX directive, EMC directive, RoHS directive

II 2G Ex db IIC
T5/T4 Gb
Ex db IIC
T5/T4 Gb

Flameproof construction+ intrinsically safe explosion-proof
construction
II 2G Ex db ia IIC
T4 Gb
Ex db ia IIC
T4 Gb

HART7

RIKEN KEIKI Co., Ltd

DSE-2005-2<F sensor list>
F sensor

IRF

NCF

SGF

SHF

ESF

Product
No.

Sensormodel

Gas name

Chemicalformula

F.S.

Digit

Calibration gas

Operatingtemperature range(no sudden changes)

Operatinghumidity range(no condensation)

Barrier or not(ESF only)

6200 00
6200 01
6200 026200 036200 04
6200 05
6200 06
6200 07
6200 08
6200 09
6200 106200 116200 12**** **
6000 07
6000 146000 196000 206000 216000 226000 23
6000 24
6000 25
6000 26
6000 27
6000 28
6000 29
6000 306000 31
6000 32
6000 33
6000 34
6000 35
6000 36
6000 37
6000 38
6000 39
6000 40
6000 416030 01
6030 036030 086030 04
6030 056030 06
6030 076060 016060 026060 04
6060 05
6060 06
6060 076060 086060 09
6060 106060 116060 126060 136060 146060 186060 156060 166060 036060 176100 01
6100 026100 036100 076100 28
6100 04
6100 06
6100 08

IRF-1301
IRF-1303
IRF-1315
IRF-1435
IRF-1436
IRF-1433
IRF-1437
IRF-1438
IRF-1439
IRF-1334
IRF-1316
IRF-1340
IRF-1308
IRF-1332
NCF-6318
NCF-6318
NCF-6318
NCF-6318
NCF-6318
NCF-6320
NCF-6320
NCF-6320
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
NCF-6319
SGF-8581
SGF-8581
SGF-8581
SGF-8562
SGF-8562
SGF-8563
SGF-8562
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8601
SHF-8603
SHF-8603
SHF-8603
SHF-8603
ESF-B242
ESF-B245
ESF-A24P
ESF-A24E
ESF-A24RH
ESF-A24R
ESF-A24A
ESF-X24P

MethaneIsobutane
PropaneCarbon dioxide
Carbon dioxide
Carbon dioxide
Carbon dioxide
Carbon dioxide
Carbon dioxide
MethaneEthylene
Isobutylene
N-hexane
Butadiene
EthanePropaneMethaneMethaneMethaneHydrogenHydrogenHydrogen
Isobutane
HydrogenHydrogenN-hexaneHydrogen
Isopropyl alcohol
TolueneAcetoneHydrogenN,N-dimethylacetamide
Acetylene
Ethylene
Normal octane
Ethyl alcohol
Methyl alcohol
Propylene
Vinyl chloride
MethaneMethaneDifluoromethane
Carbonyl sulfide
Carbon disulfide
Ethylene oxide
Hydrogen sulfide
MethaneIsobutane
Ethylene
Acetylene
Propylene
N-hexane
OctaneFluoromethane
Difluoromethane
Difluoromethane
Isopropyl alcohol
Hexafluoro-1,3-butadiene
1,2-dichloroethylene
Carbon monoxide
HydrogenHydrogenHydrogen
Deuterium
Ammonia
Chlorine
Carbon monoxide
Hydrogen chloride
Hydrogen sulfide
Hydrogen sulfide
Nitrogen dioxide
Oxygen

CH4
C4H10
C3H8
CO2
CO2
CO2
CO2
CO2
CO2
CH4
C2H4
C4H8
C6H14
C4H6
C2H6
C3H8
CH4
CH4
CH4
H2
H2
H2
C4H10
H2
H2
C6H14
H2
C3H8O
C7H8
C3H6O
H2
C4H9NO
C2H2
C2H4
C8H18
C2H6O
CH4O
C3H6
C2H3CL
CH4
CH4
CH2F2
COS
CS2
C2H4O
H2S
CH4
C4H10
C2H4
C2H2
C3H6
C6H14
C8H18
CH3F
CH2F2
CH2F2
C3H8O
C4F6
C2H2CL2
CO
H2
H2
H2
D2
NH3
CL2
CO
HCL
H2S
H2S
NO2
O2

100 %LEL
100 %LEL
100 %LEL
2,000 ppm
5,000 ppm
10,000 ppm
2 vol%
5 vol%
10 vol%100 vol%
100 %LEL
100 %LEL
100 %LEL
100 %LEL
100 %LEL
100 %LEL
100 %LEL
2 vol%
2,000 ppm
100 %LEL
2 vol%
2,000 ppm
100 %LEL
2 vol%
100 %LEL
2,000 ppm
1 vol%
100 %LEL
100 %LEL
100 %LEL
4 vol%
4,000 ppm
100 %LEL
100 %LEL
100 %LEL
100 %LEL
100 %LEL
100 %LEL
100 %LEL
2,000 ppm
5,000 ppm
2,000 ppm
2,000 ppm
200 ppm
100 ppm
100 ppm
5,000 ppm
2,000 ppm
2,000 ppm
2,000 ppm
2,000 ppm
200 ppm
2,000 ppm
2,000 ppm
2,000 ppm
5,000 ppm
2,000 ppm
2,000 ppm
600 ppm
1,000 ppm
500 ppm
1,000 ppm
2,000 ppm
2,000 ppm
75 ppm
1.5 ppm
150 ppm
15 ppm30 ppm100 ppm
15 ppm25 %0.5 %LEL
0.5 %LEL
0.5 %LEL
1 ppm
10 ppm10 ppm
0.005 vol%0.01 vol%0.01 vol%0.5 vol%
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.01 vol%10 ppm
0.5 %LEL
0.01 vol%10 ppm
0.5 %LEL
0.01 vol%0.5 %LEL
10 ppm0.01 vol%0.5 %LEL
0.5 %LEL
0.5 %LEL
0.02 vol%20 ppm
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
0.5 %LEL
10 ppm25 ppm10 ppm10 ppm
1 ppm
1 ppm
1 ppm
25 ppm10 ppm10 ppm10 ppm10 ppm1 ppm
10 ppm10 ppm10 ppm25 ppm10 ppm10 ppm5 ppm
10 ppm
2.5 ppm
10 ppm10 ppm10 ppm
0.5 ppm
0.01 ppm
1 ppm
0.1 ppm
0.2 ppm
1 ppm
0.1 ppm
0.1 %CH4
i-C4H10
C3H8 or i-C4H10
CO2
CO2
CO2
CO2
CO2
CO2
CH4
C2H4 or CH4
i-C4H8 or i-C4H10
n-C6H14 or i-C4H10
C4H6 or CH4
CH4
CH4
CH4
CH4
CH4
H2
H2
H2
i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10i-C4H10
CH4
CH4
R-32
COS
CS2
EO
H2S
CH4
i-C4H10
C2H4
C2H2
C3H6
n-C6H14
C8H18
R-41
R-32
R-32
IPA
C4F6
C2H2CL2
CO
H2
H2
H2
D2
NH3
CL2
CO
HCL
H2S
H2S
NO2
O2

-40 - 70 °C-40 - 70 °C-40 - 70 °C-20 - 70 °C-20 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-20 - 65 °C-20 - 65 °C-20 - 65 °C-20 - 65 °C-20 - 65 °C-20 - 65 °C-20 - 65 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C-30 - 70 °C
0 - 70℃-30 - 70℃
-30 - 70 °C-30 - 70 °C-30 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C-40 - 70 °C

95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less
95 %RH or less20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
20 - 95 %RH
30 - 80 %RH
30 - 80 %RH
20 - 90 %RH
20 - 90 %RH
40 - 95 %RH
20 - 90 %RH
20 - 90 %RH
20 - 90 %RH

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Remarks

Hydrogen selectivity
Hydrogen selectivity
Hydrogen selectivity

Scheduled to bereleased*Please contact Riken Keiki for information on other gas types and detection ranges.

RIKEN KEIKI Co., Ltd

DSE-2005-2

Exterior drawings[SD-3 Series]

Diffusion type without EC barrier

Suction type (pour into by external unit)
without EC barrier

Diffusion type with EC barrier

Suction type (pour into by external unit)
with EC barrier[Remote type: SD-3SC + GD-3 Series]

Main unit (SD-3SC)

Remote sensor unit (GD-3 Series)
Diffusion type without EC barrier

Remote sensor unit (GD-3 Series)
Diffusion type with EC barrier

RIKEN KEIKI Co., Ltd

DSE-2005-2

Standard accessories
Name

Quantity

Part No.

Description

Control key*

4286 9200 80

Key used to operate the productOperating lever

×1

2594 0481 90

Tool used to connect cables to the terminal plateHex key wrench(2 across flats)*

1510 5020 40

Tool used to tighten M4 hex socket set screws*The number will differ depending on the number of units purchased.
1 -10 units: × 1, 11 - 20 units: × 2, 21 - 50 units: × 3, 51 or more units: × 4

Optional accessories (sold separately)Part No.: 4283 9011 00
Calibration adapter(for IRF sensor only)Part No.: 4283 9016 60
Calibration adapter for the SD-3RI<Materials> Body: PP, nipple: stainlesssteel/Teflon

Part No.: 4283 9012 70
Calibration adapter(for combustible gas
sensor only)

Calibration adapter for the SD-3NC/GH/GHS/SP<Materials> Body: PP, nipple: stainlesssteel/Teflon

Part No.: 4283 9013 40
Calibration adapter(for ESF sensor only)

Calibration adapter for the SD-3EC/ECS/ECB<Materials> Body: PP, nipple: stainlesssteel/Teflon

Part No.: 4283 9019 80 (wall mounting) / 4283 9045 60 (pole mounting)Protective cover

Cover for protecting the SD-3 main unit
<Material> SUS316

Part No.: 4283 9015 90
Sunshade(for IRF)
Part No.: 4283 9017 30
Splash guard(for NCF/SGF/SHF)<Material> SUS316

M25 × 1.5 blanking plug

Splash guard(for ECF)

Adapter for converting M25 × 1.5 threads to
1/2NPT threads

Silicone removal
filter (SI-8)

Activated carbon
filter(CF-8304)

cable

Adapter for converting M25 × 1.5 threads to
3/4NPT threads

Part No.: 4283 9055 50

kit

Lightning arrester

Adapter for converting M25 × 1.5 threads to
M20 × 1.5 threads

Part No.: 2032 0116 40

Relay connector used when connecting a HART
modem

(TP48-3-N-NDI)

Lightning arrester(TP48-4-N-NDI)(1.25 A, 100 V DC)

Device for limiting instantaneous overvoltage
due to lightning
With conversion adapter(M25×1.5⇒1/2NPT)

Device for limiting instantaneous overvoltage
due to lightning
With conversion adapter(M25×1.5⇒1/2NPT)Part No.: 4283 9046 30

U-bolt parts
Littelfuse fuse

Kit for mounting the remote sensor head ona duct<Material> SUS316<Material> Equivalent to SUS316<Material> Equivalent to SUS316

Filter for removing traces of silicone fromatmosphere. Fitting the filter extends sensor
service life. Offers silicone removal
performance superior to the silicone removal
filter.*2

Part No.: 4262 9580 80
Duct mounting

Part No.: 2564 0125 10
Fuse

Filter for removing traces of silicone fromatmosphere. Fitting the filter extends sensor
service life.*1

It can also be used to remove interferencegas. This minimizes interference effects fromgases other than the detection target gas.

<Material> Equivalent to SUS316

Part No.: 2905 2439 10
HART communication

Cover for protecting sensors against waterand dust. “3” is marked on the underside of
the guard. <Material> Resin

Part No.: 4283 0030 10<Material> Equivalent to SUS316

Part No.: 4283 9047 10
Adapter<Material> Resin

Part No.: 4283 0040 10Part No.: 4283 9057 00
Adapter

Cover for protecting sensors against waterand dust. “2” is marked on the underside of
the guard.

Part No.: 4283 9031 80

Part No.: 4283 9058 70
Adapter

Cover for protecting sensors against waterand dust. “2” is marked on the underside of
the guard.
<Material> Resin

Cover to minimize rise in temperature due to
direct sunlight or radiant heat

Part No.: 4283 9018 10
Blanking plug

Splash guard

U-bolt, spring washers, and hexagonal nuts
for use when installing the main unit on apole (size: 50A (2B))<Material> SUS316*1: Fitting the silicone removal filter will limit the types of detection target gases.
*2: Fitting the activated carbon filter will further limit the types of detection target gases
than with the silicone removal filter.

RIKEN KEIKI Co., Ltd

Order information

SD-3

①

② (③

0

0

0

⑦

⑧)

[Remote type: Main unit (SD-3SC) + Remote sensor unit (GD-3)]

SD-3SC ( ③
GD-3
①

D

③

④

Infrared typeNC

New ceramic typeGH

Semiconductor type
Semiconductor type + sintered metal(selectable for CS2 only)
Hot-wire semiconductor type
Electrochemical type(selectable for CO/O2 only)
Electrochemical type + sintered metal(selectable for H2S only)
Electrochemical type + barrier(selectable for gases other than
CO/O2/H2S)

EC
ECS
ECB

⑦

⑧)

Additional cable connectors
0

Suction type (pour into by external unit)

RI

SP

0

*Explosion-proof application model

Diffusion type

Sensor type selection

GHS

0

②

Diffusion type/suction type selection
Blank

②

①

0

⑤

⑥

⑦

Connector 1 + Connector 2 [standard]
Connector 1 + Connector 2 + Connector 4 +1Connector 5
Explosion-proof
1

ATEX/IECEx [Standard]

2

-

3

-

4

-

Functional safety0

No [Standard]

1-

Performance certification
0

No [Standard]

1

-

2

-

3

-

Range setting *Connector 2Connector 40Single range [Standard][Standard][Optional]

1

Double range + 4-16 (selectable with NC only)2

Double range + L4-20 (selectable with NC only)

3

Double range + H4-20 (selectable with NC only)

Connector 1

Connector 5[Standard][Optional]

Additional cable connectors* If you do not use the connection port, be sure to plug itwith a blanking plug (sold separately)⑧

Output type selection0

4 - 20 mA + HART [Standard]

1

4 - 20 mA + HART + contact (3c)2-

*HART communication is not available when double range is selected.

★Distributed by:

DSE-2005-2