Aurora TDLAS Hygrometer
GE™s Aurora analyzer uses tunable diode laser absorption spectroscopy (TDLAS) to measure moisture in natural gas rapidly and accurately. The analyzer is suitable for installation in hazardous areas and operates over a wide range of environmental conditions. Aurora™s fast response quickly alerts and documents when moisture concentrations are out of compliance. Once process upsets are corrected and the gas dries out, the fast response enables natural gas to be cleared for entry into the energy grid.
GE™s experience in moisture measurement includes aluminum oxide, polymer capacitance and chilled mirror sensors. GE™s heritage also includes the development of the first injection diode laser in 1962 by Dr. Robert Hall in Schenectady, NY. The compact and inexpensive diode laser made it possible for compact discs, laser printers and fiber optic telecommunications. The new Aurora TDLAS hygrometer enables natural gas processing and transportation facilities to monitor moisture content in real time with high precision and reliability.
Get the Moisture
Aurora TDLAS Hygrometer Specifications
Ease of Operation
Reliable and Safe
Key Features & Benefits
AuroraView PC Software
The system is supplied with AuroraView software, a utility that enables the Aurora to interface to a remote personal computer. AuroraView enables remote readout of user-selected parameters, trend graphing, diagnostics and the capture of the spectral scan. Trend data and spectral scans can be saved as ASCII text files, facilitating the ability to export and share the data in other application software such as Excel.
AuroraView has intuitive pull-down menus for setting up the parameters to be displayed, graphed and data logged.
AuroraView software displays direct readings of moisture, temperature and pressure, as well as trend graphs. The data trends can be exported as ASCII text and opened in spreadsheet programs such as Excel.
Moisture monitoring in oil & gas and transportation facilities.
|Analyzer||100-240 VAC, 50-60 Hz, 10 W
18-32 VDC (24 VDC nominal), 10 W
|Optional Electrical Heater||120 VAC, 120 W
230 VAC, 75 W
|Parts Per Million by Volume||5 to 5000 ppm|
-65.5° to -2.6°C frost point
-85.9° to 27.3°F frost point
|Process Dew/Frost Point1||Process or equivalent dew point/frost point by calculation with process pressure signal (4-20 mA) or constant|
|Absolute Humidity||3.8 to 3,803 mg/m3|
|Absolute Humidity||0.24 to 237 lbs/MMSCF|
|1 Readings below 0°C (32°F) are in "frost point," temperature and above 0°C (32°F) are in dew point temperature.|
|Parts Per Million by Volume||±2% of reading or 4 ppmv
(Accuracy of other parameters derived from ppmv.)
|System Response||The system response is dependent on the length of sample tubing, sample system components, flow rate and pressure, as well as the change in moisture concentration.|
|Operating Sample Cell Pressure||69 to 172 Kpa (10-25 psia)|
|Maximum Pressure||1380 KPa (200 psi)|
|Process Pressure||10,342 KPa (1500 psig) maximum2
2 Higher pressure available with application of additional sampling system components.
|Operating||-20 to 65°C (-4 to 149Â°F)|
|Storage||-20 to 70°C (-4 to 158Â°F)|
|Optional Heater/Thermostat Set Point||25°C (77°F)|
|Sample Cell Flowrate||10 to 60 SLH (0.4 to 2 SCFH ); 30 SLH (1 SCFH) nominal|
|Coalescer By-pass Fast Loop||5 to 10X of flowrate through sample cell|
|Backlit LCD. Three programable simultaneous parameters. Alphanumeric status and diagnostic display. LEDs for power, laser temperature stability, keypad lockout.|
|Analog Outputs||Three programmable 0/4-20 mA; 500 Ohm max load.|
|Analog Input||Loop powered 4-20 mA input for remote pressure transmitter. Aurora supplies 24 VDC.|
|Digital Interface||Two programmable digital communications ports RS232, RS485 with multidrop capability and assignable address, Modbus RTU protocol|
|Class 1 product. Conforms to IEC 60825-1. Edition 2.0
Safety of Laser Products
|Programmable â€œthrough-the-glass via magnetic stylus|
|37 Kg (100 lb)|
Hazardous Area Certification
|USA/Canada||Explosion-proof for Class I, Division 1, Groups C&D|
|EU and Elsewhere||ATEX and IEC Ex:
Ex de IIB T6 -20°C to +65°C
Flameproof with increased safety compartment
|CE||Complies with EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC and Pressure Directive 97/25/EC for DN/25|
Recommended Factory Verification/Service