Exclusive UK Distributor and Service Centre for Gas Detection Equipment by Riken Keiki & RKI Instruments.
Exclusive UK Distributor and Service Centre for Gas Detection Equipment by Riken Keiki & RKI Instruments.
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.
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.
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.
OX-600 Oxygen Deficiency Monitor
| 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, |
| Hydrogen Chloride HCI |
(C) 2 ppm |
6 ppm, |
| Hydrogen Fluoride HF |
0.5 ppm |
9 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 |
|
||
| 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.
Smart Transmitter Gas Detector
Carbon Monoxide Monitor
Standalone Ethylene Oxide Detector
Oxygen Deficiency Monitor
Carbon Dioxide Monitor
Contact Weatherall
Datasheet for Riken Keiki model GD-70D
Applications Bulletin # 11 Intelligent Gas Monitoring for the Semiconductor industry