Aurora NOSSTDLAS moisture analyzer
Aurora NOSS is a modified version of the Aurora analyzer. It is
configured to enable installation within customized samplingsystems.
The Aurora NOSS consists of the laser absorption flow
cell, sample pressure and temperature sensors, read-out
electronics with local display and keypad interface. The
unit is assembled on an epoxy coated or 316 SS plate. All
system components are Class 1 Division 1 or ATEX/IECEx Zone
1 certified.

A sampling system is required to filter contaminants, reduce
the pressure of the applied process gas and control the flowrate. In addition, sample-conditioning components such asheaters, valves, flow meters etc., may be applied dependingon the specific application. Panametrics’ applications
engineers can review your application details and design asystem to meet your requirements.
The Aurora NOSS has the identical functionality, features, andperformance as the turnkey Aurora. Please refer to the Aurora
product data sheet for additional information.

Dimensions

13.6(345.44)

3.300(83.82)

15.75
(400)

27.94(709.67)

26.50(673.10)

3.23(82.04)
9.290(235.96)

Dimensions in inches (mm)Specifications
PowerResponse time100-240 VAC, 50-60 Hz, 10 W
18-32 VDC (24 VDC nominal), 10 W

Optical response< 2 seconds

Range
Parts per million by volume
0 to 5000 ppmv
For CO2 applications: 0 to 1000 ppmv
Dew/frost point-97.1° to 27.3°F (-71.7° to –2.6°C) frost point @ STP of 25°C,14.696 psia
Process dew/frost point
Process or equivalent dew point/frost point by calculation
with process pressure signal (4-20 mA) or constant pressure
value.
Notes: Readings below 0°C (32°F) are in “frost point” temperature andabove 0°C (32°F) are in “dew point” temperature.

Absolute humidity
0.095 to 237 lbs/MMSCF (1.52 to 3,803 mg/m3)

Accuracy
Parts per million by volume±1% of reading or ±2 ppmv, whichever is greater; for >1000
ppmv ±5% of reading.
For CO2 applications:±3% of reading or ±5 ppmv
For H2 recycle applications: ±1% of reading or ±2 ppmv (forup to ±5% H2 and ±1% C2H6 variation from nominal calibration
composition).
Individual instrument calibrated accuracy conditions
provided in Certificate of Conformance. Accuracy of otherparameters derived from ppmv.

Repeatability
Parts per million by volume±0.2 ppmv or ±0.1%, whichever is greater.
For CO2 applications: ±1.0 ppmv or ±0.5%, whichever isgreater.
Other moisture parameters
Derived from ppmv

System response
The system response is dependent on the length of sample
tubing, sample system components, flow rate and pressure,and the change in moisture concentration.

Operating pressure
Operating sample cell pressure
10 to 25 psia (69 to 172 Pa)
Maximum sample cell pressure
200 psi (1380 kPa)
Notes: Higher pressure available with application of additional samplingsystem components.

Operating temperature
Operating temperature range-20° to 65°C (-4° to 149°F)

Flowrate
Sample cell flowrate
10 to 60 SLH (0.4 to 2 SCFH ); 30 SLH (1 SCFH) nominal
Notes: A fast loop bypass of 5-10x of the sample cell flow rate isrecommended.

Display
Backlit LCD
Three programmable simultaneous parameters.
Alphanumeric status and diagnostic display.
LED indicators
Power, laser temperature stability, keypad lockout and faults.
User interface
Keypad is programmable “through-the-glass” via magneticstylus.

I/Os

Certifications

Analog outputs
Three 0/4-20 mA DC (source) with 500-ohm load. User
programmable for any parameter and scalable. Complies
with NAMUR protocol for analog signals.

United States/Canada
cFMus Explosion-proof for Class I, Division 1, Groups B, C, D.

Analog inputs
Loop powered 4-20 mA input for remote pressure transmitter.
Aurora supplies 24 VDC.

Digital interface
Serial ports
Two programmable digital communications RS232/RS485
ports. Multidrop capability with assignable address. MODBUS
RTU protocol.
One ethernet port: Modbus TCP/IP protocol
EnclosureIngress rating IP-66

Dimensions

EU and other countries
ATEX and IECEx: Ex de IIB+H2 T6 -20°C to +65°C Flameproof
with increased safety compartment
European certification
CE: Complies with EMC Directive 2004/108/EC, Low Voltage
Directive 2006/95/EC and Pressure Directive 97/25/EC for
DN/25

LaserLaser Class 1 product. Conforms to IEC 60825-1. Edition 2.0
Safety of Laser Products.
Notes:
1. P er ATEX and IECEx requirements the laser head assembly of the Aurora
H2O Moisture Analyzer shall be inside a tool secured enclosure with IP20or better rating to ensure the factory installed laser head assembly bolts
are unaccessible from the outside.

Ordering information

PhysicalSee drawing
Notes: The unit is assembled on an epoxy-coated steel plate. A 316
stainless steel plate is available on special order.

Net weight33.6 kg/74 lbs.

The Aurora-NOSS is sold on a customized basis per yourparticular application. Please contact Panametrics for a pricequotation.

Panametrics, a Baker Hughes Business, provides solutions in
the toughest applications and environments for moisture,oxygen, liquid and gas flow measurement.
Experts in flare management, Panametrics technology also
reduces flare emissions and optimizes performance.
With a reach that extends across the globe, Panametrics’
critical measurement solutions and flare emissions
management are enabling customers to drive efficiency
and achieve carbon reduction targets across criticalindustries including: Oil & Gas; Energy; Healthcare; Water andWastewater; Chemical Processing; Food & Beverage andmany others.
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