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RKI Instruments Sensor, Hydrogen (H2) 0 - 100% LEL, Sensor Unit - NCU-H2

Item #:
NCU-H2
Brand:
RKI Instruments
RKI Instruments Sensor, Hydrogen (H2) 0 - 100% LEL, Sensor Unit - NCU-H2
$393.75
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Discontinued

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RKI Instruments Sensor, Hydrogen (H2) 0 - 100% LEL, Sensor Unit - NCU-H2

RKI Instruments Sensor, Hydrogen (H2) 0 - 100% LEL, Sensor Unit - NCU-H2

$393.75

Discontinued


NCU-H2 Sensor, Hydrogen (H2) 0 - 100% LEL, Sensor Unit by RKI Instruments

The new Model GD-70D series 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 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 sensor 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 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.

Features:

  • Common platform (Main/Sensor/Pump) to 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 replacement of sensor and pump
  • Large size LCD (Easily viewable)
  • Reduced maintenance through enhanced troubleshooting firm ware functions
  • Smaller Footprint
  • Simple upgrade from existing unit
  • Reuse & Recycle
  • Global standard

*Please note we can only ship RKI products to customers within the United States

Main Unit Specifications:
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
Flowrate, 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)
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
Operating settings
All operational settings are user adjustable through front panel
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. PP half union fittings provided as standard accessories
Bushing
Cable type varies depending on communication method (Cable bushing optional)

Sensor Unit Specifications:
Model
ESU
SGU
SSU
OSU
NCU
Detection principle
Electrochemical cell
Semiconductor
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)

Pyrolyzer Unit Specification:
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
Pyrolyzer 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)

Gases:
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
Phosphine PH3
0.3 ppm
0 - 1.0 ppm
Phosphorus Oxychloride POCl3
0.1 ppm
HCl 0 - 6 ppm or 0 - 15 ppm
Phosphorus Pentachloride PCl5
0.1 ppm
HCl 0 - 6 ppm or 0 - 15 ppm
Phosphorus Pentafluoride PF5
(C) 2 ppm
HF 0 - 9 ppm
Phosphorus Trichloride PCl3
(C) 2 ppm
HCl 0 - 6 ppm or 0 - 15 ppm
Silane SiH4
5 ppm
0 - 15.0 ppm
Silicone Tetrachloride SiCl4
(C) 2 ppm
HCl 0 - 6 ppm or 0 - 15 ppm
Silicone Tetrafluoride SiF4
(C) 2 ppm
HF 0 - 9 ppm
Sulfur Tetrafluoride SF4
(C) 2 ppm
HF 0 - 9 ppm
Tetraethyl Orthosilicate SiC8H20O4
(C) 10 ppm
TEOS 0 - 15 ppm
Tin Tetrachloride SnCl4
(C) 2 ppm
HCl 0 - 6 ppm or 0 - 15 ppm
Trichlorosilane SiHCl3
(C) 2 ppm
HCl 0 - 6 ppm or 0 - 15 ppm
Tungsten Hexachloride WCl6
(C) 2 ppm
HCl 0 - 6 ppm or 0 - 15 ppm
Tungsten Hexafluoride WF6
(C) 2 ppm
HF 0 - 9 ppm
Hydrogen Selenide H2Se
0.05 ppm
0 - 0.20 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.

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