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GD-70D Series Intelligent Gas Detector

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The GD-70D is a compact transmitter for detection of toxic gases, oxygen, or combustible gases and vapors. This new 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 ppm and LEL versions.

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.

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

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.

Available gases
ESU Gas Detected
Ammonia NH3
Arsine AsH3
Bromine BR2
Carbon Monoxide CO
Chlorine Cl2
Chlorine Trifluoride ClF3
Diborane B2H6
Disilane Si2H6
Dimethylamine (CH3)2NH
Diethylamine (CH3CH2)2NH
Fluorine F2
Germane GeH4
Hydrogen Bromide HBr
Hydrogen Chloride HCI
Hydrogen Fluoride HF
Hydrogen Selenide H2Se
Methylamine CH3NH2
Nitric Oxide NO
Nitrogen Dioxide NO2
Nitrogen Trifluoride NF3
Ozone O3
Phosphine PH3
Silane SiH4
Sulfur Dioxide SO2
Trimethylamine (CH3)3N

SGU Gas Detected
Methane CH4
Dichloroethene C2H2CL2
Isopropyl Alcohol CH3CHOHCH3
Propane CH3H8
Methyl Alcohol CH3OH
Hydrogen H2
Difluoromethane R-32
Fluoro Methane R-41
Carbonyl Sulfide COS
Dichloromethane CH2CL2

NCU Gas Detected
Methane CH4
Isobutane i-C4H10
Hydrogen H2

SSU Gas Detected
Trimethyl Silane TMS
Trimethoxysilane TRIMOS
Tetraethyl Orthosilicate TEOS

OSU Gas Detected
Oxygen O2

Ordering Information (please refer to manual and spec sheet in the member section)
GD-70D Sample Drawing Sensor / Transmitter For Toxic Gases
GD-70D-LEL-CH4 Smart transmitter,GD-70D for Methane (CH4), 0-100% LEL
GD-70D-LEL-H2 Smart transmitter,GD-70D for Hydrogen (H2), 0-100% LEL
GD-70D-MOS-XXX Smart transmitter, GD-70D with metal oxide sensor,(specify gas & range)
GD-70D-OXY Smart transmitter,GD-70D for Oxygen (O2), 0-25%
GD-70D-XXX Smart transmitter, GD-70D toxic gas monitor (XXX denotes the gas,
see spec sheet)
GD-70DP-NF3 Smart transmitter, GD-70D for Nitrogen Trifluoride (NF3), 0-30 ppm,
includes pyrolyzer
GD-70DP-TEOS Smart transmitter,GD-70D for TEOS, 0-15 ppm, includes pyrolyzer

Standard Versions
GD-70DLN-LEL-CH4 Smart transmitter, GD-70D for Methane (CH4), 0-100% LEL with LonWorks…
GD-70DLN-LEL-H2 Smart transmitter, GD-70D for Hydrogen (H2), 0-100% LEL with LonWorks…
GD-70DLN-MOS Smart transmitter, GD-70D with MOS sensor, (specify gas & range), with LonWorks
GD-70DLN-OXY Smart transmitter, GD-70D for Oxygen (O2) 0-25%, with LonWorks…
GD-70DLN-XXX Smart transmitter, GD-70D toxic gas monitor with LonWorks (XXX denotes the gas)…
GD-70DPLN-NF3 Smart transmitter, GD-70D for Nitrogen Fluoride, 0-30 ppm, includes pyrolyzer, with LonWorks
GD-70DPLN-TEOS Smart transmitter, GD-70D for TEOS, 0-15 ppm, includes pyrolyzer, with LonWorks

GD-70SC-LN Signal converter, 4-20 mA to LonWorks
ESU-YYY-XXX Sensor, electrochemical / amp unit (YYY denotes sensor type, XXX denotes gas)

NCU-CH4 Sensor, Methane (CH4) 0-100% LEL, sensor unit
NCU-H2 Sensor, Hydrogen (H2) 0-100% LEL, sensor unit
OSU-OXY Sensor, Oxygen (O2), 0-25%, sensor/amp unit
SGU-YYY-XXX Sensor, MOS sensor / amp unit, specify gas & range (YYY denotes sensor type, XXX denotes gas)
SSU-TEOS Sensor, TEOS 0-15 ppm, ionization sensor unit