Intelligent Gas Detector

GD-70D Series

RKI Instruments

The new Model GD-70D smart gas detection transmitter series sets a new standard for performance, flexibility, and versatility. The GD-70D sample-draw transmitter offers an array of sensor technologies unmatched in the industry, including unique offerings, such as our hydrogen-specific or LEL versions. The long life high capacity pump and wide variety of sensing elements are replaceable in a few seconds, with no tools required! The smart sensors retain all calibration and sensor-specific data in non-volatile memory, so sensors can be hot-swapped in the field with no programming required. The sensors also retain calibration information, which means they can be conveniently calibrated separate from the transmitter, avoiding transport of calibration gases to the field location. The GD-70D firmware automatically corrects for long-term zero and span “drift” minimizing maintenance and maximizing reliability. The GD-70D can be used as a stand-alone device, offering a number of communication protocols to existing PLC systems, or can be integrated with RKI’s Beacon series of single and multi-channel controllers. All GD-70D transmitters include a large, easy to read integral LCD display, tri-color bar graph for visual notification of alarm status, programmable low and high alarm relays, and fault relay. Pump flow is self-tuning for maintenance-free operation. Because all GD-70D base units are identical, sensors can be interchanged with no programming or tools required, resulting in maximum flexibility to the user.

Quick Overview

    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
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Details


MAIN UNIT

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)

Additional Information


Manufacturer: RKI Instruments

 
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