GD-70D Series Intelligent Gas Detector

  • 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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  • Description
  • Features
  • Gases
  • Specifications
  • Download

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.

  • 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
  • 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.

    * Specifications subject to change without notice.

MAIN UNIT

ModelGD-70DGD-70D-NTGD-70D-ET
Communication4-20mA DCDC power line communicationPoE Method
Detection principleDifferent type depending upon sensor unit and detectable gas (see table)
Sampling methodSample 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 detected
  • Error code, content of error
Gas alarmsTwo alarm levels: 1st alarm – Red
2nd alarm – Red
Fault alarm: Yellow
External output1st, 2nd, and trouble alarms : Relay contact output for each alarm
Self diagnostic functionSystem failure, sensor failure, flow failure, communication error NT / ET / Analog
DataloggingEvent history, alarm history, calibration history. Alarm trend (180 sec before / after 1st alarm)
Operation temp. & humidity0 ~ 40ºC, 30 ~ 70% RH (non-condensing)
Operating settingsAll operational settings are user adjustable through front panel
Power requirementsDC 24V+/- 10%, approx 1.5W (Max 4W including sensor unit)
Note: Approx. 2.5W (Max 5W) with SGU sensor unit
PoE standard arrangement
Dimensions2.8”W x 4.7”H x 5.9”D (70W x 120H x 150Dmm)
WeightApprox. 0.9kg (2.0lbs), including sensor unit
MountingWall-mounting base plate by 2 or 3 screws
Sampling tubing4 x 6mm PTFE tubing recommended. Tube fittings provided as standard accessories
BushingCable type varies depending on communication method (Cable bushing optional)

SENSOR UNIT

ModelESUSGUSSUOSUNCU
Detection PrincipleElectro-chemical cellSemi-conductorPyrolysis-particleGalvanic cellCatalytic combustion
Gas detected and detection rangeRefer to list of detectable gases0-2000ppm H2, CH4, or CH2F2
(R-32) in air and others
0-15ppm TEOS in air0-25% O2 in air0-100% LEL H2, CH4, and others
Self diagnosis functionSensor trouble, system failure
Date logging functionEvent history, alarm history, calibration history, Alarm trend (60 sec. before/after 1st alarm)

PYROLYSER UNIT

ModelPLU-70
ApplicationNF3 / TEOS gases detected in air
UsageUsed 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 functionPyrolyser unit trouble
Fan Trouble
System trouble
Operating temp. & humidity0-40° C, 30-70% RH (non-condensing)
Operational settingsAll operational settings are user adjustable through front panel.
Power requirementsDC 24V+/- 10%, approx. 25W (max)
Dimensions2.8”W x 4.7”H x 5.9”D (70W x 120H x 150Dmm)
WeightApprox. 1.2kg (2.6lbs)
MountingWall-mounting base plate by 2 or 3 screws
Sampling4x6mm PTFE tubing recommended. Tube fittings provided as standard accessories
Bushing1.25sq 2 core cable for power supply DC24V (Cable bushing optional)

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Driven By Values, Delivering On A Vision.