GD-70D

Intelligent Gas Detector

  • Riken Keiki - GD-70D Intelligent Fixed Gas Monitor, Detects Hydride Gases, Toxics, Combustibles and Oxygen over 100 sensor options Riken Keiki - GD-70D Intelligent Fixed Gas Monitor, Detects Hydride Gases, Toxics, Combustibles and Oxygen over 100 sensor options
  • GD-70D - Smart Sensor GD-70D - Smart Sensor
  • GD-70D - Pump Replacement GD-70D - Pump Replacement
  • GD-70D - Intelligent Gas Detector GD-70D - Intelligent Gas Detector
GD-70D at a glance

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Riken Keiki – GD-70D. Intelligent Fixed Gas Monitor

The GD-70D Intelligent Fixed Gas Monitor has exceptional performance, flexibility, and versatility. The GD-70D has an array of sensor technologies that are unmatched in the industry. There a many toxic gas options. There are also hydrogen-specific as well as LEL versions.

The long life high capacity pump and sensors are easily and quickly replaceable. With no special tools required.

Plug and Play Smart Sensors :

The smart sensors retain all calibration as well as sensor-specific data in non-volatile memory.  The sensors can therefore be hot-swapped in the field with no programming required. In addition the sensors also retain calibration information, which means they can be conveniently calibrated separate from the Monitor.  This avoids having to transport of calibration gases to the field location. The GD-70D firmware automatically corrects for long-term zero in addition to span “drift” minimizing maintenance and maximizing reliability.

The GD-70D can be used as a stand-alone device as well as offering a number of communication protocols to existing PLC systems. Users also integrate it with single and multi-channel controllers.

Maximum Flexibility :

The GD-70D Intelligent Fixed Gas Monitors have a large, easy to read integral LCD display. They have a tri-color bar graph for visual notification of alarm status, programmable low as well as high alarm relays, and a fault relay. Pump flow is self-tuning.  It has maintenance-free operation therefore. All GD-70D base units are identical. Users can Change sensors without the need for  programming or tools. This results in maximum user flexibility .

These Monitors are very popular being used in high numbers throughout the world. Users have many years of reliable as well as trouble free service.

The GD-70D is an industry standard in semiconductor fabs and factories worldwide. They have applications  in battery room monitoring as well as anywhere where toxic gases are present . See links to complementary instruments below.

Riken Keiki - GD-70D. Intelligent Fixed Gas Monitor

OX-600 Oxygen Deficiency Monitor

RI-600 Carbon Dioxide Monitor

EC-600 Carbon Monoxide Monitor

GM-600 Ethylene Oxide Monitor

SD-1 Fixed Smart Gas Detector

 Features

  • Monitor combustibles, O2, and a wide range of toxics
  • Plug and play smart sensors retain calibration and sensor data
  • Common platform (Main unit / Sensor / Pump) for all detection methods
  • Universal main unit (all sensor types)
  • Multifunctional sensor unit (New Intelligent sensor)
  • No internal tubing (main unit) / No coil (pump)
  • Front access, no tool required, easy sensor and pump replacement
  • Large size LCD screen
  • Various communication methods available (4-20mA, NT and PoE)
  • Minimal maintenance cost through enhanced troubleshooting firmware functions
  • Small mounting space
  • Environmentally friendly
  • Wide variety of sensors available

Gas List

ESU Gas Detected

ACGIH TLV-TWA

Detection Range

Ammonia NH3

25 ppm

75 ppm

Arsine AsH3

5 ppb

0.2 ppm

Bromine BR2

0.1 ppm

1 ppm

Carbon Monoxide CO

25 ppm

75 ppm *

150 ppm

300 ppm *

Chlorine Cl2

0.5 ppm

3 ppm

1.5 ppm *

Chlorine Trifluoride ClF3

(C) 0.1 ppm

0.6 ppm

Diborane B2H6

0.1 ppm

0.3 ppm

Disilane Si2H6

(C) 2 ppm

15 ppm

Dimethylamine (CH3)2NH

5 ppm

15 ppm

Diethylamine (CH3CH2)2NH

5 ppm

15 ppm

Fluorine F2

1 ppm

3 ppm

Germane GeH4

(C) 2 ppm

0.8 ppm

Hydrogen Bromide HBr

(C) 2 ppm

6 ppm,
9 ppm *

Hydrogen Chloride HCI

(C) 2 ppm

6 ppm,
15 ppm *

Hydrogen Fluoride HF

0.5 ppm

9 ppm,
3 ppm *

Hydrogen Selenide H2Se

0.05 ppm

0.2 ppm

Methylamine CH3NH2

5 ppm

15 ppm

Nitric Oxide NO

25 ppm

100 ppm

Nitrogen Dioxide NO2

3 ppm

15 ppm

Nitrogen Trifluoride NF3

10 ppm

30 ppm

Ozone O3

0.1 ppm

0.6 ppm

Phosphine PH3

0.3 ppm

1. ppm

Silane SiH4

5 ppm

15 ppm

Sulfur Dioxide SO2

6 ppm

Trimethylamine (CH3)3N

5 ppm

15 ppm

SGU Gas Detected

ACGIH TLV-TWA

Detection Range

Methane CH4

1,000 ppm

2,000 ppm

5,000 ppm *

Dichloroethene C2H2CL2

200 ppm

600 ppm

Isopropyl Alcohol CH3CHOHCH3

200 ppm

2,000 ppm

Propane CH3H8

1,000 ppm

2,000 ppm

5,000 ppm *

Methyl Alcohol CH3OH

200 ppm

1,000 ppm

2,000 ppm *

Hydrogen H2

500 ppm *

1,000 ppm *

2,000 ppm

Difluoromethane R-32

1,000 ppm

2,000 ppm

Fluoro Methane R-41

1,000 ppm

2,000 ppm

Carbonyl Sulfide COS

2,000 ppm

Dichloromethane CH2CL2

50 ppm

2,000 ppm

NCU Gas Detected

LEL % Vol. Levels

Detection Range

Methane CH4

5% Vol.

100% LEL

2.0 Vol.

Isobutane i-C4H10

1.8% Vol.

100% LEL

Hydrogen H2

4% Vol.

2.0 Vol.

SSU Gas Detected

ACGIH TLV-TWA

Detection Range

Trimethyl Silane TMS

15 ppm

Trimethoxysilane TRIMOS

15 ppm

Tetraethyl Orthosilicate TEOS

10 ppm

15 ppm

OSU Gas Detected

ACGIH TLV-TWA

Detection Range

Oxygen O2

25% Vol.

* Special order for non-standard range

Model GD-70D GD-70D-NT GD-70D-ET
Communication 4-20mA DC DC power line communication PoE Method
Detection principle Different type depending upon sensor unit and detectable gas (see table)
Sampling method Sample drawing types (auto-adjustment of flow rate) 0.5 / min +/-10%
Display
  • Large LCD display (white backlight)
  • Gas concentration
  • Flow rate, communication status, Pyrolyzer status, gas detectored
  • Error code, content of error
Gas alarms Two alarm levels: 1st alarm – Red
2nd alarm – Red
Fault alarm: Yellow
External output 1st, 2nd, and trouble alarms : Relay contact output for each alarm
Self diagnostic function System failure, sensor failure, flow failure, communication error NT / ET / Analog
Datalogging Event history, alarm history, calibration history. Alarm trend (180 sec before / after 1st alarm)
Operation temp. & humidity 0 ~ 40ºC, 30 ~ 70% RH (non-condensing)
Operating settings All operational settings are user adjustable through front panel
Power requirements DC 24V+/- 10%, approx 1.5W (Max 4W including sensor unit) Note: Approx. 2.5W (Max 5W) with SGU sensor unit PoE standard arrangement
Dimensions 2.8”W x 4.7”H x 5.9”D (70W x 120H x 150Dmm)
Weight Approx. 0.9kg (2.0lbs), including sensor unit
Mounting Wall-mounting base plate by 2 or 3 screws
Sampling tubing 4 x 6mm PTFE tubing recommended. Tube fittings provided as standard accessories
Bushing Cable type varies depending on communication method (Cable bushing optional)

SENSOR UNIT

Model ESU SGU SSU OSU NCU
Detection Principle Electro-chemical cell Semi-conductor Pyrolysis-particle Galvanic cell Catalytic combustion
Gas detected and detection range Refer to list of detectable gases 0-2000ppm H2, CH4, or CH2F2
(R-32) in air and others
0-15ppm TEOS in air 0-25% O2 in air 0-100% LEL H2, CH4, and others
Self diagnosis function Sensor trouble, system failure
Date logging function Event history, alarm history, calibration history, Alarm trend (60 sec. before/after 1st alarm)

PYROLYSER UNIT

Model PLU-70
Application NF3 / TEOS gases detected in air
Usage Used by connecting to “GD-70D” (Main unit)
Power Lamp LED (Green color)
Normal: Light-on
Warming-up: Flashing at every 1 sec interval
Trouble: Flashing at every 0.2 sec interval
Self-diagnostic function Pyrolyser unit trouble
Fan Trouble
System trouble
Operating temp. & humidity 0-40° C, 30-70% RH (non-condensing)
Operational settings All operational settings are user adjustable through front panel.
Power requirements DC 24V+/- 10%, approx. 25W (max)
Dimensions 2.8”W x 4.7”H x 5.9”D (70W x 120H x 150Dmm)
Weight Approx. 1.2kg (2.6lbs)
Mounting Wall-mounting base plate by 2 or 3 screws
Sampling 4x6mm PTFE tubing recommended. Tube fittings provided as standard accessories
Bushing 1.25sq 2 core cable for power supply DC24V (Cable bushing optional)

* Specifications subject to change without notice.