RSE-0476-1
GAS DETECTOR HEAD
GD-70D-EA(ESU) SPECIFICATION
Model
Detection principle
Detectable gas*
Gas concentration display
Measuring range*
Detection method
Suction flow
Alarm preset point*
Power indication
Various indicatons
Alarm accuracy

GD-70D-EA
Electrochemical method
Toxic gas
Character LCD (Digital and Bar Meter Display)
Depend on Detectable gas
Pump suction method
0.5L/min±10%
Depend on Detectable gas
POWER lamp on(green)
Gas name display/flow rate indicator/mode display/communication status
displayLess than ±30%(against alarm preset point)(under an identical condition)

Alarm-delay time
(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact*

Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact*

Contact capacity
Contact cable
Transmission scheme

Transmission cable

Various functions
Power cable

Power supply
Power consumption
Piping port
Initial clear
Operating temperature
Operating humidity
Structure
Outer dimension
WeightColorLess than 60sec (by providing the gas 1.6 times the alarm setpoint)(excluding delay in the tube and in the communication)
Two-level alarm(H-HH)
1st：ALM1 lamp on(red)2nd：ALM2 lamp on(red)Non latching (auto-reset)
No-voltage contact 1a or 1b (2 step independent)
De-energized (energized at an alarm state) or energized (de-energizedat an alarm state)
System abnormalities/sensor abnormalities/flow rate abnormalities/
communication abnormalities
FAULT lamp on(yellow)/detail display
Non latching (auto-reset)
No-voltage contact 1a or 1b
De-energized (energized at an alarm) or energized (de-energized at an
alarm)
24 VDC, 0.5 A (resistance load)
Cable of CVV, etc. (1.25 mm2) - max. 6-core
Digital transmission: Ethernet(10BASE-T/100BASE-TX)
Analog transmission: 3-wire type analog transmission(Common cable for power and signal <Power, Signal, Common>)or 2-wire type analog transmission
Digital transmission: Ethernet cable(category 5 or higher)
Analog transmission: Shielded cable of CVVS, etc.(1.25 mm2)-3-core or
2-coreWhite backlight/alarm delay/suppression/zero follower/flow control/
Calibration history/alarm trend history/event history
Cable of CVV, etc. (1.25mm2) - 2-core (common with the digitaltransmission cable when PoE connection is used/common with the analog
transmission cable when 3-wire analog connection is used)
24 VDC ±10% or PoE connection
24 VDC：Approx.3W(Max. approx.5W)
PoE：Approx.4.5W(Max. approx. 7W)
Rc1/4 (O.D Φ 6-1t polytetrafluoroethylene (PTFE) tubing, withhalf-union <PP> for the tubing)Approx.25sec
0 - 40℃(at a constant condition)
30 - 70%RH(non-condensing. It may differ according to mounted sensor.)
Box type/Wall mounted type
Approx.70(W)×120(H)×145(D)mm(projection portions excluded)
Approx.0.9kg
Body：gray
Front door：white＊ Please specify your request when ordering.

RSE-0476-1
Outline Drawings* RJ-45 connector for Ethernet cable connection is on the bottom of the main unit.

Terminal Drawings

1
+
24VDC

2

3

4

-

+
4-20mA

5

6

ALM1 contact

7

8

ALM2 contact

9

10

FAULT contact* For PoE connection, the terminals 1 and 2 are disabled. (Connection prohibited. Supply from the RJ-45
connector.)

RSE-0658-1
GAS DETECTOR HEAD
GD-70D-EA(ESU・Anoxia alarm) SPECIFICATION
Model
Detection principle
Detectable gas
Gas concentration display
Measuring range
Detection method
Suction flow
Alarm preset point＊1
Power indication
Various indications
Indicate accuracy＊2

GD-70D-EA
Electrochemical method
O2
Character LCD (Digital and Bar Meter Display)0 - 25vol%
Pump suction method
0.5L/min±10%
18vol%(1st<L>)/18vol%(2nd<LL>)【Standard】
POWER lamp on(green)
Gas name display/flow rate indicator/mode display/communication status
displayLess than ±0.7vol%(under an identical condition)

Accuracy of Alarm setpoint＊2
Response time＊2(under an identical condition)

Alarm-delay time＊2(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact＊1

Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact＊1

Contact capacity
Contact cable
Transmission scheme

Transmission cable

Various functions
Power cable

Power supply
Power consumption
Piping port
Initial clear
Operating temperature
Operating humidity
Structure

Difference between Alarm setpoint and indicated value of warning alarm
are zero.
Less than 30sec(T90) (excluding delay in the tube and in thecommunication)
By anoxia alarm(Alarm preset point ： 18vol%),less than 5sec(whenintroducing 10 - 11vol% gas) (excluding delay in the tube and in thecommunication)
Two-level alarm(L-LL)
1st：ALM1 lamp on(red)2nd：ALM2 lamp on(red)Non latching (auto-reset)
No-voltage contact 1a or 1b (2 step independent)
De-energized (energized at an alarm state) or energized (de-energizedat an alarm state)
System abnormalities/sensor abnormalities/flow rate abnormalities/
communication abnormalities
FAULT lamp on(yellow)/detail display
Non latching (auto-reset)
No-voltage contact 1a or 1b
De-energized (energized at an alarm) or energized (de-energized at an
alarm)
24 VDC, 0.5 A (resistance load)
Cable of CVV, etc. (1.25 mm2) - max. 6-core
Digital transmission: Ethernet(10BASE-T/100BASE-TX)
Analog transmission: 3-wire type analog transmission(Common cable for power and signal <Power, Signal, Common>)or 2-wire type analog transmission
Digital transmission: Ethernet cable(category 5 or higher)
Analog transmission: Shielded cable of CVVS, etc.(1.25 mm2)-3-core or
2-coreWhite backlight/alarm delay/suppression/zero follower/flow control/
Calibration history/alarm trend history/event history
Cable of CVV, etc. (1.25mm2) - 2-core (common with the digitaltransmission cable when PoE connection is used/common with the analog
transmission cable when 3-wire analog connection is used)
24 VDC ±10% or PoE connection
24 VDC：Approx.3W (Max. approx.5W)
PoE：Approx.4.5W (Max. approx.7W)
Rc1/4 (O.D Φ 6-1t polytetrafluoroethylene (PTFE) tubing, withhalf-union <PP> for the tubing)Approx.25sec-10℃ - 40℃(at a constant condition)
6 - 88%RH (non-condensing)Box type/Wall mounted type

RSE-0658-1
Approx.70(W)×120(H)×145(D)mm(projection portions excluded)
Approx.0.9kg
Body：gray
Front door：whiteOuter dimension
WeightColor＊1 Please specify your request when ordering.
＊2 In conformity to JIS T8201 2010(Oxygen deficiency indicator).

Outline Drawings* RJ-45 connector for Ethernet cable connection is on the bottom of the main unit.

Terminal Drawings

1
+
24VDC

2

3

4

-

+
4-20mA

5

6

ALM1 contact

7

8

ALM2 contact

9

10

FAULT contact* For PoE connection, the terminals 1 and 2 are disabled. (Connection prohibited. Supply from the RJ-45
connector.)

RSE-0479-1
GAS DETECTOR HEAD
GD-70D-EA(SGU) SPECIFICATION
Model
Detection principle
Detectable gas*
Gas concentration display
Measuring range*
Detection method
Suction flow
Alarm preset point*
Power indication
Various indications
Alarm accuracy*(under an identical condition)

Alarm-delay time*(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact*

Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact*

Contact capacity
Contact cable
Transmission scheme

Transmission cable

Various functions
Power cable

Power supply
Power consumption
Piping port
Initial clear
Operating temperature
Operating humidity
Structure
Outer dimension
WeightColor

GD-70D-EA
Semi-conductor method
Combustible gas/Toxic gas
Character LCD (Digital and Bar Meter Display)
Depend on Detectable gas
Pump suction method
0.5L/min±10%
Depend on Detectable gas
POWER lamp on(green)
Gas name display/flow rate indicator/mode display/communication status
display
Combustible gas：Less than ±25%(against alarm preset point)
Toxic gas：Less than ±30%(against alarm preset point)
Less than 30sec or 60sec(by providing the gas 1.6 times the alarm setpoint) (Depends on
Detectable gas, excluding delay in the tube and in the communication)
Two-level alarm(H-HH)
1st：ALM1 lamp on(red)2nd：ALM2 lamp on(red)Non latching (auto-reset)
No-voltage contact 1a or 1b (2 step independent)
De-energized (energized at an alarm state) or energized (de-energizedat an alarm state)
System abnormalities/sensor abnormalities/flow rate abnormalities/
communication abnormalities
FAULT lamp on(yellow)/detail display
Non latching (auto-reset)
No-voltage contact 1a or 1b
De-energized (energized at an alarm) or energized (de-energized at an
alarm)
24 VDC, 0.5 A (resistance load)
Cable of CVV, etc. (1.25 mm2) - max. 6-core
Digital transmission: Ethernet(10BASE-T/100BASE-TX)
Analog transmission: 3-wire type analog transmission(Common cable for power and signal <Power, Signal, Common>)or 2-wire type analog transmission
Digital transmission: Ethernet cable(category 5 or higher)
Analog transmission: Shielded cable of CVVS, etc.(1.25 mm2)-3-core or
2-coreWhite backlight/alarm delay/suppression/zero follower/flow control/
Calibration history/alarm trend history/event history
Cable of CVV, etc. (1.25mm2) - 2-core (common with the digitaltransmission cable when PoE connection is used/common with the analog
transmission cable when 3-wire analog connection is used)
24 VDC ±10% or PoE connection
24 VDC：Approx.4W (Max. approx.6W)
PoE：Approx.5.5W (Max. approx.7W)
Rc1/4 (O.D Φ 6-1t polytetrafluoroethylene (PTFE) tubing, withhalf-union <PP> for the tubing)Approx.25sec
0 - 40℃(at a constant condition)Less than 95%RH(non-condensing)Box type/Wall mounted type
Approx.70(W)×120(H)×145(D)mm(projection portions excluded)
Approx.0.9kg
Body：gray
Front door：white＊ Please specify your request when ordering.

RSE-0479-1
Outline Drawings* RJ-45 connector for Ethernet cable connection is on the bottom of the main unit.

Terminal Drawings

1
+
24VDC

2

3

4

-

+
4-20mA

5

6

ALM1 contact

7

8

ALM2 contact

9

10

FAULT contact* For PoE connection, the terminals 1 and 2 are disabled. (Connection prohibited. Supply from the RJ-45
connector.)

RSE-0480-1
GAS DETECTOR HEAD
GD-70D-EA(OSU・Anoxia alarm) SPECIFICATION
Model
Detection principle
Detectable gas
Gas concentration display
Measuring range
Detection method
Suction flow
Alarm preset point＊1
Power indication
Various indications
Indicate accuracy＊2

GD-70D-EA
Galvanic cell method
O2
Character LCD (Digital and Bar Meter Display)0 - 25vol%
Pump suction method
0.5L/min±10%
18vol%(1st<L>)/18vol%(2nd<LL>)【Standard】
POWER lamp on(green)
Gas name display/flow rate indicator/mode display/communication status
displayLess than ±0.7vol%(under an identical condition)

Accuracy of Alarm setpoint＊2
Response time＊2(under an identical condition)

Alarm-delay time＊2(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact＊1

Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact＊1

Contact capacity
Contact cable
Transmission scheme

Transmission cable

Various functions
Power cable

Power supply
Power consumption
Piping port
Initial clear
Operating temperature
Operating humidity
Structure

Difference between Alarm setpoint and indicated value of warning alarm
are zero.
Less than 30sec(T90) (excluding delay in the tube and in thecommunication)
By anoxia alarm(Alarm preset point ： 18vol%),less than 5sec(whenintroducing 10 - 11vol% gas) (excluding delay in the tube and in thecommunication)
Two-level alarm(L-LL or L-H)
1st：ALM1 lamp on(red)2nd：ALM2 lamp on(red)Non latching (auto-reset)
No-voltage contact 1a or 1b (2 step independent)
De-energized (energized at an alarm state) or energized (de-energizedat an alarm state)
System abnormalities/sensor abnormalities/flow rate abnormalities/
communication abnormalities
FAULT lamp on(yellow)/detail display
Non latching (auto-reset)
No-voltage contact 1a or 1b
De-energized (energized at an alarm) or energized (de-energized at an
alarm)
24 VDC, 0.5 A (resistance load)
Cable of CVV, etc. (1.25 mm2) - max. 6-core
Digital transmission: Ethernet(10BASE-T/100BASE-TX)
Analog transmission: 3-wire type analog transmission(Common cable for power and signal <Power, Signal, Common>)or 2-wire type analog transmission
Digital transmission: Ethernet cable(category 5 or higher)
Analog transmission: Shielded cable of CVVS, etc.(1.25 mm2)-3-core or
2-coreWhite backlight/alarm delay/suppression/zero follower/flow control/
Calibration history/alarm trend history/event history
Cable of CVV, etc. (1.25mm2) - 2-core (common with the digitaltransmission cable when PoE connection is used/common with the analog
transmission cable when 3-wire analog connection is used)
24 VDC ±10% or PoE connection
24 VDC：Approx.3W (Max. approx.5W)
PoE：Approx.4.5W (Max. approx.7W)
Rc1/4 (O.D Φ 6-1t polytetrafluoroethylene (PTFE) tubing, withhalf-union <PP> for the tubing)Approx.25sec
0 - 40℃(at a constant condition)Less than 95%RH(non-condensing)Box type/Wall mounted type

RSE-0480-1
Approx.70(W)×120(H)×145(D)mm(projection portions excluded)
Approx.0.9kg
Body：gray
Front door：whiteOuter dimension
WeightColor＊1 Please specify your request when ordering.
＊2 In conformity to JIS T8201 2010(Oxygen deficiency indicator).

Outline Drawings* RJ-45 connector for Ethernet cable connection is on the bottom of the main unit.

Terminal Drawings

1
+
24VDC

2

3

4

-

+
4-20mA

5

6

ALM1 contact

7

8

ALM2 contact

9

10

FAULT contact* For PoE connection, the terminals 1 and 2 are disabled. (Connection prohibited. Supply from the RJ-45
connector.)

RSE-0475-1
GAS DETECTOR HEAD
GD-70D-EA(NCU) SPECIFICATION
Model
Detection principle
Detectable gas*
Gas concentration display
Measuring range*
Detection method
Suction flow
Alarm preset point*
Power indication
Various indications
Alarm accuracy(under an identical condition)

Alarm-delay time
(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact*

Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact*

Contact capacity
Contact cable
Transmission scheme

Transmission cable

Various functions
Power cable

Power supply
Power consumption
Piping port
Initial clear
Operating temperature
Operating humidity
Structure
Outer dimension
WeightColor

GD-70D-EA
New ceramic catalytic method
Combustible gas
Character LCD (Digital and Bar Meter Display)
Depend on Detectable gas
Pump suction method
0.5L/min±10%
Depend on Detectable gas
POWER lamp on(green)
Gas name display/flow rate indicator/mode display/communication status
displayLess than ±25%(against alarm preset point)
Less than 30sec (by providing the gas 1.6 times the alarm setpoint)(excluding delay in the tube and in the communication)
Two-level alarm(H-HH)
1st：ALM1 lamp on(red)2nd：ALM2 lamp on(red)Non latching (auto-reset)
No-voltage contact 1a or 1b (2 step independent)
De-energized (energized at an alarm state) or energized (de-energizedat an alarm state)
System abnormalities/sensor abnormalities/flow rate abnormalities/
communication abnormalities
FAULT lamp on(yellow)/detail display
Non latching (auto-reset)
No-voltage contact 1a or 1b
De-energized (energized at an alarm) or energized (de-energized at an
alarm)
24 VDC, 0.5 A (resistance load)
Cable of CVV, etc. (1.25 mm2) - max. 6-core
Digital transmission: Ethernet(10BASE-T/100BASE-TX)
Analog transmission: 3-wire type analog transmission(Common cable for power and signal <Power, Signal, Common>)or 2-wire type analog transmission
Digital transmission: Ethernet cable(category 5 or higher)
Analog transmission: Shielded cable of CVVS, etc.(1.25 mm2)-3-core or
2-coreWhite backlight/alarm delay/suppression/zero follower/flow control/
Calibration history/alarm trend history/event history
Cable of CVV, etc. (1.25mm2) - 2-core (common with the digitaltransmission cable when PoE connection is used/common with the analog
transmission cable when 3-wire analog connection is used)
24 VDC ±10% or PoE connection
24 VDC: Approx. 4.5W (Max. approx. 6.5W)
PoE: Approx. 5.5W (Max. approx. 8.5W)
Rc1/4 (O.D Φ 6-1t polytetrafluoroethylene (PTFE) tubing, withhalf-union <PP> for the tubing)Approx.25sec
0 - 40℃(at a constant condition)Less than 95%RH(non-condensing)Box type/Wall mounted type
Approx.70(W)×120(H)×145(D)mm(projection portions excluded)
Approx.0.9kg
Body：gray
Front door：white＊ Please specify your request when ordering.

RSE-0475-1
Outline Drawings* RJ-45 connector for Ethernet cable connection is on the bottom of the main unit.

Terminal Drawings

1
+
24VDC

2

3

4

-

+
4-20mA

5

6

ALM1 contact

7

8

ALM2 contact

9

10

FAULT contact* For PoE connection, the terminals 1 and 2 are disabled. (Connection prohibited. Supply from the RJ-45
connector.)

RSE-0844-1
GAS DETECTOR HEAD
GD-70D-EA(SHU) SPECIFICATION
Model
Detection principle
Detectable gas
Gas concentration display
Measuring range
Detection method
Suction flow
Alarm preset point*
Power indication
Various indicatons
OutputAlarm accuracy

GD-70D-EA
Hot wire semiconductor method
H2
LCD(digital and bar-meter display)
0-2000ppm
Pomp suction method
0.5L/min±10%
1st：500ppm 2nd：1000ppm [Standard setting]
POWER lamp lighting(green)
Gas/Flow/ModeGas concentration signal/Gas alarm contact/Trouble alarm contact
Less than ±30%(against alarm preset point)(under an identical condition)

Alarm-delay time
(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact*

Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact*

Contact capacity
Contact cable
Transmission scheme

Specification oftransmission
Transmission cable
Various functions
Power cable
Power supply
Power consumption
Piping port
Initial clear
Operating temperature
Operating humidity
Structure
Outer dimension
WeightColorLess than 30sec(when introducing 1.6 times thicker gas than alarm preset
point)(without piping delay time)Two-level alarm(H-HH)
1st：ALM1 lamp lighting(red)2nd：ALM2 lamp lighting(red)Auto-recover
Each no-voltage contact 1a or 1b(contact output for each alarm)
Non-exciting at normal(exciting at alarm) or exciting at
normal(non-exciting at alarm)
System failure/Sensor failure/Flow failure
FAULT lamp lighting(yellow)/content display
Auto-recoverNo-voltage contact 1a or 1b
Non-exciting at normal(exciting at alarm) or exciting at
normal(non-exciting at alarm)
DC24V・0.5A(load resistance)
CVV worth cable(1.25mm2)・MAX.6-core
Digital transmission:Ethernet
Analog transmission:Three-wire analog transmission(in common with power
supply<power supply,signal,common>) or two-wire analog transmission
Digital transmission:Ethernet
Analog transmission:DC4-20mA(non-isolated・load resistance less than300Ω)Digital transmission:Ethernet cable(category 5 or more)
Analog transmission:Shielded cable of CVVS, etc.(1.25mm2) - 2-core
White backlight/Alarm delay/Suppress/Zero tracking/Span assist/
Flow control/Proofreading history/Alarm trend history/Event history
CVV worth of cable (1.25mm2)・2-core(three-wire analog transmission isin common with transmission cable)
DC24V±10% orPoE
DC24V：Approx.4.5W(MAX.6.5W)
PoE：Approx.5.5W(MAX.8W)
Rc1/4(PP half union<for O.Dφ6-1t>is provided as standard accessories.)
Approx.25sec
0-40℃(non-rapidly-vary.)
Below 95%RH(non-condensing.)
Box type・Wall mounting type
Approx.70(W)×120(H)×145(D)mm(projection excluding)Approx.0.9kg
Body：gray
Front door：white＊ Please specify your request when ordering.

RSE-0844-1
Outline Drawings

Terminal Drawings

1
+
24VDC

2

3

4

-

+
4-20mA

5

6

ALM1 contact

7

8

ALM2 contact

9

10

FAULT contact＊For the 3-wire type (4 - 20 mA), the terminal 2 is used for common, and the terminals 2(-) and 3(+)
are used to output 4 - 20 mA.
If power supply by PoE is performed, the terminal 1(+) and 2(-) cannot be used.